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JP,2006-005846,A
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CLAIMS
DETAILED DESCRIPTION
TECHNICAL FIELD
PRIOR ART
EFFECT OF THE INVENTION
TECHNICAL PROBLEM
MEANS
DESCRIPTION OF DRAWINGS
DRAWINGS
* NOTICES *
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1.This document has been translated by computer. So the translation may not
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2.**** shows the word which can not be translated.
3.In the drawings, any words are not translated.
[Detailed Description of the Invention]
[Field of the Invention]
[0001]
This invention relates mainly to the conversion structure of the high frequency
transmission line in a microwave band and a millimeter wave belt, and relates to
the waveguide microstrip line converter which connects rectangular waveguide and
a microstrip line especially.
[Background of the Invention]
[0002]
As the transmission line of the high frequency signal in a microwave band and a
millimeter wave belt, rectangular waveguide and a microstrip line (following,
MSL) are used widely. Rectangular waveguide is used when transmitting a high
frequency signal to the antenna apparatus which has a case where low-loss [ of
the transmission line ] is searched for, and a rectangular waveguide interface.
MSL is used when a miniaturization is called for in the transmission line inside
apparatus. Rectangular waveguide and the converter of MSL are often needed and
are used.
[0003]
There are a thing of the structure connected as a connection form of rectangular
waveguide and MSL without changing each signal transmission direction and a
thing of structure which changes a transmission direction right-angled in a
connected part, and it is properly used by arrangement and structure of the
connection appliance.
[0004]
As the rectangular waveguide connected without changing a signal transmission
direction, and a converter of MSL, the prior art with a comparatively easy
structure is known. (For example, see nonpatent literature 1)
[0005]
[Nonpatent literature 1] Microstrip Lines and Slotlines Second
Edition,p43,Figure 1.28,Artech House
[0006]
The connection structure shown in the nonpatent literature 1 is once converted
to ridge waveguide form by attaching a taper type converter to the inside of
rectangular waveguide, After making the electric field distribution seen in the
waveguide section approximate to the electric field distribution seen in the MSL
section, a taper termination is connected to the line conductor of MSL, and the
high frequency signal to MSL is transmitted. A taper converter is good also as
lambda / a 4 multistage step converter (henceforth, step converter), and if the
form and dimension specifications of MSL are suitably set up also in which
converter, it is possible to suppress a reflection of a high frequency signal
low over a broadband.

[Description of the Invention]
[Problem to be solved by the invention]
[0007]
However, in the connection structure shown in the nonpatent literature 1, no
current of high frequency signals will flow into the MSL side in the connected
part of a taper converter and MSL, but a part of current will flow into a
rectangular waveguide outer surface further from the cutting plane of
rectangular waveguide along a taper end face. By this current, an unnecessary
wave is emitted to space from the break point of form, or there was a problem of
gathering a noise from the external world.
[0008]
It is made in order that this invention may solve the starting problem, and it
aims at suppressing the radiation of an unnecessary wave and mixing of the noise
from the external world in a waveguide microstrip line converter.
[Means for solving problem]
[0009]
The waveguide microstrip line converter by this invention,
A microstrip line, rectangular waveguide, and the conductor shorting bar with
which the line end of the aforementioned microstrip line arranged oppositely,
the end face of the aforementioned rectangular waveguide provided, and the
through hole was formed, While being attached to the inner surface of the
aforementioned rectangular waveguide and forming the step surface of multistage
in the opposite side of the clamp face to the rectangular waveguide concerned,
Between the terminal part of the aforementioned step converter and the line ends
of the aforementioned microstrip line is connected with the step converter with
which the height of the step surface of each stage and a clamp face becomes high
sequentially toward a terminal part, and it has a conductor pin arranged by
penetrating the through hole of the aforementioned conductor shorting bar.
The aforementioned microstrip line arranges the surface on the line conductor
side oppositely to the clamp-face side of the aforementioned step converter, and
the aforementioned conductor shorting bar carries out eccentricity of the medial
axis of the aforementioned through hole to the clamp-face side of the
aforementioned step converter to the medial axis of the aforementioned conductor
pin.
[Effect of the Invention]
[0010]
According to this invention, the extraneous emission between a taper converter
and a microstrip line can be oppressed.
Since the electric field distribution of the transmission line from rectangular
waveguide to a microstrip line is maintainable to the distribution approximated
substantially, a reflection can be low suppressed over a broadband.
[Best Mode of Carrying Out the Invention]
[0011]
Embodiment 1.
Hereinafter, it describes about the embodiment 1 which starts this invention
using the figure.
Fig.1 is the figure showing the composition of the waveguide MSL converter by
embodiment 1, and (a) shows each electric field distribution [ in / (c) can be
set / in / in a side surface cross sectional view and (b) / the section AA / to
section BB, and / in (d) / section CC ]. Fig.2 is a plan showing the composition
of the coaxial MSL converter by embodiment 1.
[0012]
In the figure, the conductor chassis 8, the conductor cover 9, and the shorting
bar 10 constitute the rectangular waveguide 7. The step converter 6 is attached
at the inner surface of the rectangular waveguide 7 of the conductor cover 9 on
the propagating direction (the following, propagating direction) of the high
frequency signal in the rectangular waveguide 7, and the center line of the
conductor cover 9 which corresponds. The step converter 6 comprises a metal
plate molded into staircase shape, and the step surface of at least two or more
steps of multistage is provided. The example of the figure shows three steps of
step surfaces. The length of the propagating direction of each step is 1 of
abbreviated 4 minutes of the wavelength of using frequency. From the clamp face
of the rectangular waveguide 7, toward the terminal part (henceforth, final step
part) of the rectangular waveguide 7, the step converter 6 is arranged so that

the step surface may separate from the clamp face sequentially. That is, in a
final step part, the height from a clamp face to the step surface becomes the
highest, and it approaches most the inner surface of the rectangular waveguide 7
which faces a clamp face.
[0013]
The step converter 6 is providing the conductor pin 4 to the terminal surface
contiguous to the step surface in a final step part. The final step part of the
step converter 6 has a gap between the inner surfaces on the clamp-face side of
the rectangular waveguide 7. The penetrated through hole 5 is provided, and the
shorting bar 10 approaches the final step part of the step converter 6, and is
arranged in the terminal surface of the rectangular waveguide 7. The conductor
pin 4 penetrates the through hole 5 of the rectangular waveguide 7, and it is
arranged so that it may project in the specified quantity from the through hole
5. Positioning which is the conductor pin 4 and the through hole 5 has
accomplished the medial axis of the through hole 5 so that it may become the
position shifted to the specified quantity step converter clamp-face side to the
medial axis of the conductor pin 4. That is, the through hole 5 is an eccentric
hole to the conductor pin 4.
[0014]
In a facing-clamp face of step converter 6 of conductor chassis 8 surface, the
substrate 2 which constitutes MSL is attached so that the shorting bar 10 near
the shorting bar 10 may be touched. The line conductor 1 is provided on the
substrate 2, and the conductor pin 4 is connected to the terminal part of the
line conductor 1 with soldering etc. The earth conductor 3 is provided by the
back surface of the substrate 2. The earth conductor 3 is soldered to the
conductor chassis 7, and is completely fixed to the conductor chassis 8 by
adhesion or a screw stop by electroconductive glue, etc. Of course, if
sufficient bonding strength is obtained, only solder fixing will be. Between the
final step part of the step converter 6, and the conductor cover 9, the sum of
the dimension of a and b shown in Fig.1 considers it as the form excised so that
it might become one wave of abbreviated 4 minutes of using frequency
(propagation wave length). a dimension shows the length of the conductor cover 9
in the shorting bar 10, and the inner surface of the through hole 5, and b
dimension shows the height of the gap of the step converter 6 and the conductor
cover 9.
[0015]
On account of not the parts separated not necessarily but processing, or an
assembly, it may unify suitably, and the conductor chassis 8, the shorting bar
10, the conductor cover 9, the step converter 6, and the conductor pin 4 should
just finish setting up each separated part by a screw stop etc.
[0016]
Hereinafter, it describes about propagation operation of a signal based on
change of electric field distribution when a high frequency signal is input from
the rectangular waveguide 7.
[0017]
When the electric field distribution in the section of the rectangular waveguide
7 is TE01 mode usual in excitation mode, the electric field of a cross section
center become the cosine distribution with the highest strength. Next, if a
signal spreads in the part which provided the step converter 6, in the final
step section where the field intensity between the rectangular waveguide inner
surfaces which face a step lower surface becomes still stronger, and an interval
becomes minimum, As shown in Fig.1 (d), it comes to concentrate most electric
fields near the center of rectangular waveguide 7 inner surface which faces the
step converter 6.
[0018]
The sectional shape shown in Fig.1 (d) is called ridge waveguide, and the step
converter 6 is functioning as a converter from the rectangular waveguide 7 to
ridge waveguide. The length to the propagating direction of each step is what is
considered as one wave of abbreviated 4 minutes, and it is possible to negate
the reflection in a step level difference mutually. Broadband-izing is possible
by increasing the number of stages of a step, and if 4 thru/or about 5 steps are
used, it will be made to a low reflection converter over the whole operating
frequency band of the rectangular waveguide 7.
[0019]

Next, a high frequency signal is led to the eccentricity coaxial track
constituted from the conductor pin 4 and the through hole 5 from the final step.
In the node of a step converter and MSL, with the nonpatent literature 1, short
circuit planes are provided to the nearest to a rectangular waveguide end face
used as an open structure, and the through hole is provided to these short
circuit planes at this embodiment. By letting the conductor pin which connects
the line conductor of MSL with the step converter installed in this through hole
inside rectangular waveguide mutually pass, the eccentricity coaxial track was
formed and the waveguide MSL converter which suppressed radiation of unnecessary
electromagnetic waves is realized.
[0020]
However, in converting rectangular waveguide to ridge waveguide form and making
the electric field distribution of a waveguide section approximate to the
electric field distribution of a MSL section. If it connects with the coaxial
track where electric field distribution only differs, when transmitting a high
frequency signal to MSL from which electric field distribution differs again,
signal reflection happens easily by the difference in electric field
distribution in each connected part. That is, it is because the usual coaxial
track serves as uniform electric field distribution radiate in view of a central
conductor. Under the present circumstances, although it is also possible to add
a dielectric plate and a consistency screw between a step converter and
rectangular waveguide, and to perform characteristic-impedance consistency of
the connected part of rectangular waveguide and a coaxial track, The number of
parts will increase, and it will be a high cost, and will produce the problem
that signal reflection in a coaxial track and the connected part of MSL is not
further improvable.
[0021]
For this reason, in this embodiment, as shown in Fig.1 (c), the electric field
in the section of an eccentricity coaxial track are considered as the
distribution concentrated between the conductor pin 4 and one inner surface of
the through hole 5. Since this electric field distribution is approximated with
ridge waveguide-shaped electric field distribution, it is easy to suppress the
reflection in an eccentricity coaxial track and the connected part of the
rectangular waveguide 7.
[0022]
Although are a part of ground current transmitted from the edge of the through
hole 5 about the inner surface of the shorting bar 10, it flows to the joint
part with the step converter 6 over the inner surface of the conductor cover 9
further, is reflected from a connected part and it returns to the through hole
5, If the sum of the dimensions a and b shown in Fig.1, i.e., the course length
of ground current, is set as one wave of abbreviated 4 minutes, Since it will
become open electrically [ in view of the edge of the through hole 5 ] and the
phase contrast of the ground current with the signal current which flows on the
surface of the conductor pin 4 which has reflected and returned will be 180
degree, a problem does not arise.
[0023]
Next, a high frequency signal is led to MSL from an eccentricity coaxial track.
The electric field of the MSL section serve as distribution concentrated between
the line conductor 1 and the earth conductor 3 on both sides of the substrate 2
like Fig.1 (b), and have become the electric field distribution of an
eccentricity coaxial track section, and the approximated thing. Therefore, it is
easy to suppress the reflection which takes place in an eccentricity coaxial
track and the connected part of MSL.
[0024]
As mentioned above, since the distribution approximated substantially is
maintained, the electric field in each transmission line from the rectangular
waveguide 7 to an eccentricity coaxial track and MSL become easy [ realizing the
waveguide MSL converter which suppressed the reflection low over the
broadband ]. Since the MSL side edge of the rectangular waveguide 7 has form
closed with the shorting bar 10 except for the through hole 5, the spurious
radiation which had become a problem can be inhibited with the structure of the
nonpatent literature 1.
[0025]

the through hole 5 which constitutes an eccentricity coaxial track fills with
dielectrics, such as Teflon (registered trademark), -- it may have structure. In
this case, although the part cost of a dielectric goes up, insulating
improvement in the conductor pin 4 and the through hole 5 and mechanical
improvement in holdout of the conductor pin 4 can be aimed at.
[0026]
Embodiment 2.
In the above-mentioned embodiment 1, although the step converter 6 is used for
rectangular waveguide 7 inside as a converter to ridge waveguide, the taper
converter 11 as instead shown in Fig.3 may be used. With the clamp face of the
rectangular waveguide 7, the tapered surface of curved surface shape is made to
oppose to the surface of an opposite side, i.e., the inner surface of the
conductor chassis 8, and the taper converter 11 arranges it. The tapered surface
of the taper converter 11 makes height with an installing surface high
sequentially toward the terminal surface with which the conductor pin 4 is
attached. As for the taper converter 11, the cavity part is formed between the
conductor covers 9.
The length to the transmission direction of a taper may be suitably adjusted
with a required frequency band, and the same effect as embodiment 1 is acquired.
[0027]
Embodiment 3.
According to the above-mentioned embodiment, although the diameter of the
conductor pin 4 is set constant, as shown in Fig.4, the tip of the conductor pin
4 may be processed with the stage so that the path of the point 12 of the
conductor pin 4 may become small in the connected part to the line conductor 1.
When the width of the line conductor 1 of MSL is smaller than the diameter of
the conductor pin 4, connection workability, such as soldering of the line
conductor 1 and the conductor pin 4, worsens, but this is cancelable by the
above-mentioned processing. Although a reflection arises of the stray
capacitance component which occurs between the conductor pin 4 and the shorting
bar 10 in the part where the conductor pin 4 laps with the line conductor 1,
this reflection is also mitigable in embodiment 3. The size of the point 12 of a
central conductor may be made small to a degree permissible from the mechanical
strength after processability and processing, etc.
[0028]
It cannot be overemphasized that it is good also considering the step converter
6 of embodiment 3 as the taper converter 11.
[Brief Description of the Drawings]
[0029]
[Drawing 1]It is a side surface cross sectional view showing the coaxial MSL
converter which is this embodiment of the invention 1.
[Drawing 2]It is a plan showing the coaxial MSL converter which is this
embodiment of the invention 1.
[Explanations of letters or numerals]
[0030]
1 A line conductor and 2 [ A step converter and 7 / Rectangular waveguide and
8 / A conductor chassis, 9 conductor covers, and 10 / A shorting bar and 11 /
Taper converter. ] A substrate and 3 An earth conductor, 4 conductor pins, and 5
A through hole and 6
Representative drawing
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Representative drawing 1 2 3 4
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JP,2005-347809,A
PAJ
Detail
Image
CLAIMS
TECHNICAL FIELD
PRIOR ART
TECHNICAL PROBLEM
MEANS
DRAWINGS
* NOTICES *
[0001]
The present invention relates to the satellite signal converter used for the
antenna system of satellite broadcasting or satellite communication.
[0002]
The perspective view of an antenna system which receives electric waves, such as
satellite broadcasting and satellite communication, is shown in Fig.8. An
antenna system is provided with the parabolic antenna 32, and the satellite
signal converter is arranged as a portion which receives an electric wave so
that it may oppose to the parabolic antenna 32. In the example shown in Fig.8,
the LNB converter 31 for electric wave reception (Low Noise Block Down
Converter) is formed. The LNB converter 31 is separated and arranged from the
parabolic antenna 32, and as shown in the arrow 41, it is arranged in the
position which can receive the electric wave reflected on the surface of the
parabolic antenna 32. The electric wave received by the LNB converter 31 is
transmited to an indoor receiving set etc. by the cable 33.
[0003]
The side view of a LNB converter is shown in Fig.9. A LNB converter is provided

with the chasis body 1, the waveguide section 20, and the horn part 3. The
electric wave reflected on the surface of the parabolic antenna is received by
the primary radiator arranged inside the horn part 3. The electric wave received
with the primary radiator is detected as a signal with a probe through the
waveguide section 20. The detected signal is led to the inside of the chasis
body 1. An electric circuit is arranged and conversion etc. of the frequency of
the detected signal are performed in the inside of the chasis body 1. The F plug
4 is arranged in the surface of 1 of the chasis body 1. The output signal of a
LNB converter is transmited via the cable connected to the F plug 4 (refer to
Fig.8). The waveguide section 20 is formed cylindrical, and it is formed so that
the axial direction of the waveguide section 20 may become vertical to the
surface of the chasis body 1.
[0004]
Two components are usually contained in the microwave used for satellite
broadcasting or satellite communication. In the case of the circular
polarization, dextrorotation polarization and levorotation polarization are
contained.
[0005]
For example, the polarized-wave-separation structure of separating these two
polarization is included in the converter for satellite reception which receives
the electric wave from satellite broadcasting. The polarization rib is formed in
the inside of the waveguide section 20 as a structure for performing polarized
wave separation.
[0006]
The arrowed cross-section figure about a XI-XI line [ in / it can set in the
cross sectional view of the waveguide section 20 at Fig.10, and / to Fig.11 /
Fig.10 ] is shown. The waveguide section 20 contains the tube part 23 and the
polarization rib part 21. The waveguide section 20 is formed so that sectional
shape may become a round shape, and the plate-like polarization rib part 21 is
formed so that it may correspond to the diameter of circle of sectional shape.
The polarization rib part 21 contains the septum part 22 stair-like in plane
shape in one end.
[0007]
The polarization rib part 21 and the tube part 23 are integrally formed by
casting. That is, the polarization rib part 21 and the tube part 23 are formed
as one component. The waveguide section 20 is fixed to the chasis body 1.
[0008]
About the structure of having the characteristics in a waveguide section, the
waveguide and the coaxial line mode converter, with which the inside of a
waveguide was constituted by tapered shape are disclosed, for example in JP,S61-
134103,U.
[Patent document 1] JP,S61-134103,U
[0009]
In the LNB converter shown in Fig.11 from Fig.8, the form of the septum part 22
of the polarization rib part 21 passes only one polarization among
dextrorotation polarization or levorotation polarization, and is formed in form
which intercepts the polarization of another side. For this reason, when the
form of the septum part 22 deviated from predetermined form to the stipulated
range, there was a problem that polarized wave separation could not be performed
precisely.
[0010]
For example, when R form (not shown) at the tip of each stage of the septum part
22, the position in the width of the septum part 22 or the tube part 23 of the
septum part 22, etc. deviated from regulation, change arose for the performance
of polarized wave separation, and there was a problem "perform desired polarized
wave separation."
[0011]
in a Prior art, since the tube part 23 and the polarization rib part 21 were
formed by casting, it becomes impossible for the form of the septum part 22 to
have filled predetermined form by the conditions of casting, etc., and there was
a problem that the yield got very bad.
[0012]

The present invention is made in order to solve the above-mentioned problem.
The purpose is to provide a satellite signal converter which is excellent in
polarized-wave-separation performance and whose yield improves.
[0013]
In order to achieve the above-mentioned object, the satellite signal converter
based on the present invention is provided with the waveguide section connected
to the horn part, including the polarization rib by which at least one copy is
arranged, the above-mentioned waveguide and a polarization rib are individually
formed in the inside of a waveguide and the above-mentioned waveguide, and the
above-mentioned waveguide section is mutually fixed to it. By adopting this
composition, it excels in polarized-wave-separation performance, and can provide
the satellite signal converter whose yield improves.
[0014]
In the above-mentioned invention, preferably, the above-mentioned polarization
rib is made from either among aluminum, zinc, stainless steel, and conductive
resin, and is formed. Cross polarization improves by adopting one of composition
among these.
[0015]
In the above-mentioned invention, it has preferably the chasis body in which the
above-mentioned waveguide was fixed, the above-mentioned polarization rib is
fixed so that it may be inserted into a plurality of fixing members, and the
above-mentioned fixing member is fixed to the chasis body. By adopting this
composition, the above-mentioned polarization rib can be easily fixed to the
above-mentioned waveguide. Positioning of the above-mentioned polarization rib
can be performed easily.
[0016]
In the above-mentioned invention, preferably, a groove part is formed in the
inner surface of the above-mentioned waveguide, and the above-mentioned
polarization rib is inserted in the above-mentioned groove part, and is fixed to
the above-mentioned waveguide with the binder. By adopting this composition, the
above-mentioned polarization rib can be fixed to the above-mentioned waveguide
with easy composition.
[0017]
In the above-mentioned invention, the above-mentioned binder contains either
among silicon system resin, epoxy system resin, and acrylic resin preferably. By
adopting this composition, the above-mentioned polarization rib can be fixed to
the above-mentioned waveguide by a well-known component.
[Effect of the Invention]
[0018]
According to the present invention, it excels in polarized-wave-separation
performance, and can provide the satellite signal converter whose yield
improves.
[0019]
(Embodiment 1)
(Elements of the Invention)
With reference to Fig.5, it describes from Fig.1 about the satellite signal
converter in the embodiment 1 based on the present invention. The satellite
signal converter in this embodiment is a LNB converter with which the antenna
system which receives the signal of satellite broadcasting was equipped. As
shown in Fig.8, it is the same as that of the LNB converter in a Prior art that
a LNB converter is arranged so that it may oppose on the surface of a parabolic
antenna.
[0020]
The front view of the LNB converter in this embodiment is shown in Fig.1, and
the side view of a LNB converter is shown in Fig.2. A LNB converter is provided
with the following.
Chasis body 1.
Waveguide section 2.
Horn part 3.
The LNB converter in this embodiment is a LNB converter for receiving a
plurality of electric waves. Multiple waveguide sections 2 are formed.

[0021]
In this embodiment, it is formed so that the sectional shape of each waveguide
section 2 may become a round shape. That is, the waveguide section 2 is formed
so that contour shape may become cylindrical. The two waveguide sections 2 are
formed so that an axial direction may become parallel mutually, and the axial
direction is formed so that it may become vertical to the surface of the chasis
body 1. The waveguide section 2 is formed so that it may project from the
surface of the chasis body 1.
[0022]
The chasis body 1 is substantially formed in the core box of rectangular
parallelepiped shape, and electric circuits, such as a frequency changing
circuit, are formed in the inside. The F plug (F connector) 4 for connecting the
cable to outside is formed in the side surface of the chasis body 1. The two F
plugs 4 are formed in this embodiment.
[0023]
The horn part 3 is formed at the tip of the waveguide section 2. Inside the horn
part 3, the primary radiator of a horning die and the dielectric type primary
radiator are arranged. In this embodiment, each primary radiator is formed to
each waveguide section 2. The horn part 3 is formed so that an electric wave may
be received, and the waveguide section 2 is connected to the horn part 3 so that
the received electric wave may be detected with a probe.
[0024]
The cross sectional view of the one waveguide section 2 is shown in Fig.3, and
the arrowed cross-section figure about the IV-IV line in Fig.3 is shown in
Fig.4. The waveguide section 2 is provided with the following.
The waveguide 8 of cylindrical shape.
The polarization rib 5 plate-like [ for performing polarized wave separation ].
The waveguide 8 and the polarization rib 5 in the waveguide section 2 are formed
as a component with individual each.
[0025]
The waveguide 8 has the groove part 15. The groove part 15 is arranged on the
circular diameter which is the sectional shape of the waveguide 8. The groove
part 15 is formed so that it may correspond to the sectional shape of the
polarization rib 5. The groove part 15 is formed so that it may become
substantially parallel to the axial direction of the waveguide 8. That is, the
main surface of the polarization rib 5 and the axial direction of the waveguide
8 are formed so that it may become substantially parallel. Or the polarization
rib 5 is arranged so that it may pass along the center of the circle in the
sectional shape of the waveguide 8. The polarization rib 5 in this embodiment is
made from aluminum, and is formed.
[0026]
As shown in Fig.4, junction fixing of the waveguide 8 is carried out by methods,
such as welding, at the chasis body 1. A part is inserted in the groove part 15
of the waveguide 8, and the polarization rib 5 is arranged so that it may be
inserted in the waveguide 8. The polarization rib 5 has the septum part 6 stair-
like in plane shape. In this embodiment, the septum part 6 is arranged so that
it may oppose to a horn part. In this embodiment, the stationary plate 10 is
formed as a fixing member of the polarization rib 5.
[0027]
A rear elevation when the portion of Fig.4 is seen from the stationary-plate 10
side is shown in Fig.5. With reference to Fig.4 and Fig.5, the part which
projected the polarization rib 5 inside the chasis body 1 is fixed by the
stationary plate 10. The polarization rib 5 is fixed to the two stationary
plates 10. The stationary plate 10 is formed in plate-like form, and it is
arranged so that the polarization rib 5 may be put.
[0028]
The stationary plate 10 is fixed to the screw holding part 12 formed in the
chasis body 1 on the screw 11. The screw holding part 12 is the portion formed
so that it might project toward the inside of the chasis body 1. The screw 11 is
fixed to the screw holding part 12. The stationary plate 10 of two sheets is
fixed where the polarization rib 5 is put. Thus, the stationary plate 10 is
fixed to the chasis body 1 via the screw holding part 12.
[0029]
(An operation and an effect)

With reference to Fig.1 and Fig.2, the electric wave reflected on the surface of
the parabolic antenna is received by the horn part 3. The electric wave received
by the horn part 3 passes along the waveguide section 2, is detected as a signal
with a probe, and is led to electric circuits, such as frequency conversion
formed in the inside of the chasis body 1. The output from an electric circuit
lets the F plug 4 pass, and is transmitted to a connecting cable. The electric
wave containing dextrorotation polarization and levorotation polarization is an
inside of the waveguide section 2, and is converted to a linearly polarized
wave. That is, a circular polarization is converted to a linearly polarized wave
by the polarization rib 5 arranged inside the waveguide section 2.
[0030]
With reference to Fig.3 and Fig.4, as for the waveguide section of a LNB
converter based on the present invention, the waveguide and the polarization rib
are formed individually. That is, the waveguide and polarization rib of each
other which were formed by another manufacturing process, respectively are
fixed, and the waveguide section is formed. By adopting this composition, a
polarization rib can be formed easily. The form of a polarization rib can be
manufactured precisely and the LNB converter excellent in the polarized-wave-
separation performance can be provided.
[0031]
For example, when forming a polarization rib by casting, the conditions at the
time of casting can be doubled only with a polarization rib, and while the span
of adjustable range of the conditions of casting enlarges, the polarization rib
which was excellent in the quality of dimensional accuracy improving can be
formed. Similarly, the waveguide which was excellent in quality can be formed.
[0032]
In a manufacturing process, a polarization rib can be fixed to a waveguide and
the position of the polarization rib in a waveguide section can be tuned finely.
Therefore, the polarized-wave-separation characteristic can be improved.
[0033]
Thus, while the dimensional accuracy of the component of a waveguide and a
polarization rib improves, the position of the polarization rib to a waveguide
can be tuned finely. Therefore, the defective article in manufacture can be
reduced and the yield can be improved. That is, the rectangular rate in a
factory line can be improved substantially.
[0034]
As shown in Fig.4 and Fig.5, the LNB converter in this embodiment is fixed so
that a polarization rib may be pinched by the stationary plate as a plurality of
fixing members, and a plurality of stationary plates are fixed to the chasis
body. By adopting this composition, a polarization rib can be easily fixed to a
waveguide. The position of a polarization rib can be finely tuned easily at the
time of an assembly.
[0035]
Since the waveguide and the polarization rib are formed individually, the
satellite signal converter based on the present invention can make the material
of a waveguide, and the material of a polarization rib a different thing.
Although formed from aluminum, it is not restricted to this form in particular,
but the polarization rib in this embodiment is made from either among zinc,
stainless steel, and conductor resin in consideration of the characteristic of
an electric wave, the durability of a polarization rib, etc. to receive, and may
be formed. By forming the polarization rib with one of materials among these,
the polarization rib corresponding to each electric wave can be formed. As a
result, the polarized-wave-separation characteristic can be improved or cross
polarization can be improved.
[0036]
In this embodiment, although the polarization rib is fixed by the stationary
plate of two sheets as a plurality of fixing members, it may not be restricted
to this form in particular, but the polarization rib may be fixed to more fixing
members. For example, the four corners of the polarization rib may be fixed with
each fixing member. As a fixing member, it is not restricted to a plate-like
component, but the thing of any form can be used. In this embodiment, although
two waveguide sections have the same composition mutually, even if the present
invention is applied to one of waveguide sections, it does not matter even if
one waveguide section is formed.

[0037]
In this embodiment, although described about the LNB converter which receives
satellite broadcasting, it is not restricted to this form in particular, but the
present invention can be applied to the satellite signal converter which
receives satellite broadcasting or satellite communication.
[0038]
(Embodiment 2)
(Elements of the Invention)
With reference to Fig.6 and Fig.7, it describes about the satellite signal
converter in the embodiment 2 based on the present invention. The satellite
signal converter in this embodiment is a LNB converter for receiving the signal
of satellite broadcasting. It is the same as that of the LNB converter in
embodiment 1 that a LNB converter is arranged so that it may oppose to the
parabolic antenna of an antenna system, and it contains a waveguide section. In
the LNB converter of this embodiment, the composition of a waveguide section
differs from the LNB converter in embodiment 1.
[0039]
The cross sectional view of the waveguide section in this embodiment is shown in
Fig.6. The arrowed cross-section figure about the VII-VII line in Fig.6 is shown
in Fig.7. The waveguide section 9 of the waveguide 8 and the polarization rib 5
being included is the same as that of embodiment 1.
[0040]
The LNB converter of each other [ the waveguide 8 and the polarization rib 5 /
in the resin 7 as a binder ] in this embodiment is fixed. The groove part 15 is
formed in the inner surface of the waveguide 8, and the polarization rib 5 is
arranged so that a part of polarization rib 5 may be inserted in the groove part
15. The resin 7 is arranged in the groove part 15, and it is arranged so that
the waveguide 8 and the polarization rib 5 may be fixed along the groove part
15. As resin which fixes the waveguide 8 and the polarization rib 5, silicon
system resin, epoxy system resin, acrylic resin, etc. can be used.
[0041]
Since it is the same as that of embodiment 1 about other composition, a
description is not repeated here.
[0042]
(An operation and an effect)
As for the LNB converter in this embodiment, a groove part is formed in the
inner surface of a waveguide, and a polarization rib is inserted in a groove
part and fixed to the waveguide section by resin. By adopting this composition,
composition which fixes a polarization rib to a waveguide can be made easy.
[0043]
As resin which fixes a polarization rib and a waveguide, silicon system resin,
epoxy system resin, acrylic resin, etc. can be used. A polarization rib and a
waveguide can be reliably fixed with a well-known binder by using either among
these. As for a binder, it is preferable to use the optimal thing according to
the material of a waveguide and the material of a polarization rib.
[0044]
Since it is the same as that of embodiment 1 about other operations and effects,
a description is not repeated here.
[0045]
The above-mentioned embodiment disclosed this time is [ no ] illustration at
points, and restrictive. The range of the present invention is not the above-
mentioned description, is shown by Claims, and includes Claims, an equal
meaning, and all the change in within the limits.
[0046]
[Drawing 1]It is a front view of the LNB converter in embodiment 1.
[Drawing 2]It is a side view of the LNB converter in embodiment 1.
[Drawing 3]It is a first cross sectional view of the waveguide section of the
LNB converter in embodiment 1.
[Drawing 4]It is a second cross sectional view of the waveguide section of the
[Drawing 5]It is a rear elevation of the portion which fixes the polarization
rib of the LNB converter in embodiment 1.
[Drawing 6]It is a first cross sectional view of the waveguide section of the

[Drawing 7]It is a second cross sectional view of the waveguide section of the
[Drawing 8]It is a perspective view of an antenna system.
[Drawing 9]It is a side view of the LNB converter based on a Prior art.
[Drawing 10]It is a first cross sectional view of the waveguide section of a LNB
converter based on a Prior art.
[Drawing 11]It is a second cross sectional view of the waveguide section of a
LNB converter based on a Prior art.
[0047]
1 A chasis body, and 2 and 9 A waveguide section, 3 horn parts, 4 F plug, 5 A
polarization rib and 6 [ A stationary plate and 11 / A screw and 12 / A screw
holding part and 15 / A groove part and 20 / A waveguide section and 21 / A
polarization rib part and 22 / A septum part and 23 / A tube part, 31 LNB
converter, and 32 / A parabolic antenna and 33 / A cable and 41 / Arrow. ] A
septum part and 7 Resin and 8 A waveguide and 10
drawing1
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Representative drawing 1 2 3 4 5 6 7 8 9 10 11
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JP,2005-027299,A
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CLAIMS
TECHNICAL FIELD
PRIOR ART
TECHNICAL PROBLEM
MEANS
DRAWINGS

CORRECTION OR AMENDMENT
* NOTICES *
[0001]
The present invention relates to signal conversion equipment and a multi port
device.
[0002]
The electromagnetic radiation of a radio frequency (RF), microwave, a millimeter
wave, and other high frequency (HF) is widely used in the use of a
communications system, a household appliance, and an automobile.
[0003]
Converting a high frequency electromagnetism signal to other elements brings
eventually a result of the remarkable noise and loss which can give a shock to
the performance of parts or a system from one element. In a high frequency use,
the causes of a remarkable loss are the impedance between the parts combined so
that propagation of a high frequency signal might be affected, and the
mismatching (only called impedance mismatching in many cases) of a reactance.
[0004]
An autonomous vehicle speed setting device (below Autonomous Cruise Control:
calls ACC) is a millimeter wave radar base.
It is used for controlling speed of an automobile safely.
This ACC adjusts the vehicle speed based on the signal reflected from the object
close to vehicles and vehicles. This equipment requires the antenna which
converged satisfactorily the high frequency signal from the ACC electronic
device mounted in vehicles. For this reason, the thing from an electrical
machinery and apparatus to antenna structure which an ACC signal converts is
required. This signal transformation is performed in many cases by combining
with antenna feed the micro stripe transmission line (micro stripe) which is an
electromagnetic wave waveguide. In operation frequency, ACC antenna feed is a
rectangular and circular waveguide in many cases.
[0005]
The impedance mismatching between a micro stripe and antenna feed can become the
insertion loss and reflection attenuation which degrade signal strength and also
the performance of ACC and which cannot be disregarded.
[Patent document 1] JP,S62-133801,A
[0006]
The publicly known equipment and technique which are used for converting to the
antenna of ACC from an electronic device had mechanical instability, a low
separation loss, return loss, and a problem of too high a manufacturing cost.
[0007]
Therefore, the high frequency signal from an electronic device is combined with
a waveguide, and the equipment which conquers the defect of above-mentioned
equipment at least is needed.
[0008]
A "single" term comprises [ both ] three or more parts, is fixed, and means
forming elegance in part as used on these Descriptions. The term of "one" means
the thing which cannot divide and which is consisted of elegance in part. For
example, both single elements may have a plurality of fixed parts, and an
integral part may be molded from a molded article.
[0009]
According to the typical embodiment of the present invention, signal conversion
equipment possesses the 1st waveguide, the 2nd waveguide, and the 3rd waveguide.

The ** impedance match of the conversion between the 1st, 2nd, and 3rd
waveguides is carried out substantially.
[0010]
According to another typical embodiment of the present invention, signal
conversion equipment possesses ridge waveguide, the 1st rectangular waveguide,
and a circular waveguide.
[0011]
According to another typical embodiment of the present invention, a multi port
device possesses a plurality of signal conversion equipment, and each signal
conversion equipment possesses ridge waveguide, the 1st rectangular waveguide,
and a circular waveguide.
[0012]
If the present invention is read with an accompanying drawing, it will be best
understood from the following detailed descriptions. It emphasizes that the
various characteristics are not necessarily illustrated as a dimension. In order
to describe clearly, a dimension is actually expanded or reduced suitably.
[0013]
In the following detailed descriptions, the typical embodiment which discloses
specific details is described in order to give a perfect understanding of the
present invention for the description object instead of the limited object.
However, it will be understood for the person skilled in the art who got
disclosure of the present invention that the present invention can be practiced
by another embodiment which deviated from the specific details disclosed in this
Description. The description of a well-known device, a method, and material is
abbreviated to the description of the present invention not becoming indefinite.
Finally, even if it is a case where it applies and practices where, the same
reference mark is attached about the same element.
[0014]
Fig.1 shows the signal conversion equipment (STA is called hereafter) 100
according to one typical embodiment of the present invention. STA100 has the
component 109 arranged on the bottom plate 108. Although it becomes clear by the
back, STA100 converts impedance to parts (not shown) from a device, and converts
the mode of a device to the mode of parts. This part is passive components, such
as an antenna.
[0015]
The device 101 is arranged on the bottom plate 108, and may have a high
frequency integrated circuit, passivity, active radio-frequency head articles,
or those combination. The device 101 may have the one or more plane (planar)
transmission lines, such as an asymmetrical strip / micro stripe signal
transmission line (a micro stripe or a microstrip line), and a bottom plate
functions as a ground plane (ground plane) of the transmission line in this
case.
[0016]
The component 109 has the 1st waveguide 102, the 2nd waveguide 103, and the 3rd
waveguide 104. The 1st waveguide 102 is constituted so that it may combine with
the device 101, and it carries out mode conversion of the mode of the device 101
to the waveguide mode of the 1st waveguide 102. For example, when the connection
part to a device goes via a micro stripe, the 1st waveguide 102 converts the
quasi TEM mode of microwave to the mode of the 1st waveguide. The 1st waveguide
102 is constituted so that a signal may be combined with the 2nd waveguide 103.
Similarly, the 2nd waveguide 103 is constituted so that a signal may be combined
with the 3rd waveguide 104, and the 3rd waveguide 104 combines a signal with
another device (not shown). As for the element which STA100 adjoins, common
impedance is adjusted substantially. That is, both conversion that crosses the
waveguide with which STA continues is adjusted. The structure acquired as a
result of STA100 becomes comparatively small, and this consistency enables it to
have sufficient performance characteristic.
[0017]
The 2nd waveguide 103 and the 3rd waveguide 104 are arranged at the angle 107
which the axis 105 of the 2nd waveguide 103 (as a result, device 101) and the
axis 106 of the 3rd waveguide 104 intersect. In the embodiment shown in Fig.1,
this angle 107 is about 90 degrees. For this reason, eventually, the signal from
the device 101 advances in the direction which carries out a regular rectangular

cross to the first direction of propagation.
[0018]
Although it becomes clear by the back, probably, the regular orthogonal
transformation of a propagating direction will be advantageous in the embodiment
of a certain use of supplying electric power to an antenna within an ACC device.
However, in other uses, probably, it will be useful, also when changing a
propagating direction in other directions or not changing at all. For this
reason, the angle 107 is within the limits of about 0 to about 90 degrees.
[0019]
According to the illustrated embodiment, the 4th waveguide 110 may be arranged
between the 2nd and 3rd waveguides 103,104, and may be 1/4 substantial
wavelength converter. Since the 4th waveguide 110 gives the impedance match
between the 2nd and 3rd waveguides, and mode consistency, it improves a
transmission characteristic. For example, when the connection part from the
device 101 to STA100 is a micro stripe, the 3rd waveguide 104 is a circular
waveguide and the 4th waveguide can promote the efficient conversion in the high
order former mode of the 1st and 2nd waveguides to the rule mode of a circular
waveguide.
[0020]
The component 109 and the bottom plate 108 are the suitable products made from
material for use for a high-frequency-signal-transmission use. For example, in
the signal-transmission use in the frequency of about 74.0 GHz - about 79.0 GHz,
STA100 may be aluminum, brass, copper, other metal, or a product made from an
alloy. The frequency range and material which were mentioned are shown for the
purpose of illustration, and it does not have intention of limiting the range of
an embodiment. For example, STA100 may be useful although the mode and impedance
from the device 101 whose signal is the frequency ranging from the divisor of
100 MHz to less than about 200 GHz to parts are converted, and it may be a
product made from material suitable for the signal transmission in the selected
specific frequency range.
[0021]
The component 109 illustrated is really an element and may be molded with
suitable materials, such as suitable metal or an alloy. Or the component 109 may
be a single element which consists of the discrete part fixed by both suitable
anchorages, such as a screw, electroconductive glue, solder, and those
combination. According to another typical embodiment, the component 109 and the
bottom plate 108 can be made into one. Or the component 108 and the bottom plate
108 may be the elements of the separate body fixed by both suitable anchorages,
such as a screw, solder, or electroconductive glue.
[0022]
As characteristics, STA100 and the parts to constitute are waveguide structures,
and do not include a dielectric material (except for air). For this reason, even
if the ohmic loss usually governed by the tangent loss of a dielectric material
on high frequency, such as especially 77 GHz, does not become zero substantially
by use of STA100, it becomes the minimum. The insertion loss and reflection
attenuation in signal transformation from the device 101 to guide structures,
such as antenna feed, are improved as a result of substantial consistency of the
** impedance which crosses that a tangent loss is lost substantially and the
waveguide with which a typical embodiment adjoins so that he can understand
easily. In this embodiment and other embodiments, STA100 can convert a signal to
a waveguide from a device with a small structure substantially so that it may be
described more by details on these Descriptions. This originates in ****** of
the waveguide of STA100.
[0023]
STA100 of an above-mentioned embodiment functions on a useful thing as the
impedance and the mode converter between the device 101 and the 3rd waveguide
104 which turn to the angle from about 0 degree to about 90 degrees to the axis
of a device.
[0024]
Before continuing the description of other embodiments, various materials of
STA100, the characteristic, the characteristics, and the use should care about
that it is possible to take in also to the embodiment described below. Similarly
various materials of an embodiment described below, the characteristic, the
characteristics, and use can be taken in also to STA100.

[0025]
Fig.2 thru/or Fig.5 show STA200 according to one typical embodiment. STA200
illustrated converts the quasi TEM mode of the micro stripe 214 to the rule mode
(for example, H11 mode) of the circular waveguide 211 of the small structure
where the performance characteristic has been improved as compared with a
publicly known device.
[0026]
In one embodiment, STA200 is useful, although an ACC circuit is combined with an
ACC antenna via antenna feed. An ACC circuit has a signal source which generates
the signal transmitted by the antenna. A signal source may have a cancer (Gunn)
oscillator, an oscillator of a metal semiconductor-field-effect-transistors
(MESFET) base, or an oscillator of a pseudomorph high electron mobility
transistor (pHEMT) base. However, it is only illustration to carry out STA200 in
ACC, and STA200 is usable although other radio-frequency head articles are
combined with a waveguide in many other uses. For example, STA200 is usable
although the high frequency electromagnetism signal between elements is combined
in other uses, such as a communications system of point to point, a point-to-
multi point, and a multipoint versus a multipoint.
[0027]
In one typical embodiment, STA200 possesses the component 201 arranged on the
bottom plate 210. The bottom plate 210 has as illustration the micro stripe 214
which has the signal wire conductor 202. The micro stripe 214 is combined with
one or more electronic devices (not shown) like a passive component (not shown)
with the one end usable to a high frequency circuit (not shown), and the other
end is combined with the component 201 at the point 203. STA200 strengthens the
efficient combination to the circular waveguide 211 of the signal from the
microstrip line 214 which functions as impedance and a mode converter and
functions as a feeder system to an ACC antenna (not shown) so that it may become
clear by the back.
[0028]
As shown in the various figures of Fig.2 thru/or Fig.5, the component 201 has
the ridge waveguide 205, the 1st rectangular waveguide 207 of the region 206,
and the circular waveguide 209. When combined, the component 201 and the bottom
plate 210 have the 2nd rectangular waveguide 215 which consists of the upper
part 208 and the lower part 212. If the component 201 and the bottom plate 210
are combined, it will be combined with the circular waveguide 211 of the bottom
plate 210, and the circular waveguide 209 of the component 201 will follow the
circular waveguide 211 electrically substantially. Therefore, if the bottom
plate 210 and the component 201 are combined, the circular waveguide 209,211 can
be substantially considered as a single circular waveguide.
[0029]
The ridge waveguide 205 is a two-step device, and functions as the micro stripe
214 and a main impedance converter of the 1st 207 rectangular waveguides. The
ridge waveguide 205 converts the quasi TEM mode of the micro stripe 214
efficiently with the mode of the 1st rectangular waveguide 207. The ridge
waveguide 205 provides small substantial 1/4-wave impedance conversion between
the waveguides of the micro stripe 214, the component 201, and the bottom plate
210. That is, in order to assist the circular waveguide 211 with a small and
efficient method in carrying out signal transformation from the microstrip line
214, the ridge waveguide 205 is used.
[0030]
However, please care about that the ridge waveguide 205 may use other waveguides
in order to have little [ many or ] stage and to attain this first conversion
from what was illustrated. Depending on the impedance characteristic of the
micro stripe 214, a circular waveguide, and the waveguide of STA200, selection
of a specific waveguide is chosen in order to optimize substantially the
waveguide mode conversion to other waveguides [ waveguide / an impedance match
and / one ].
[0031]
In order to keep between the micro stripe 214 and the waveguide 205 from
becoming discontinuous substantially electrically, **** 204 of the waveguide 205
uses suitable conductive adhesion or solder, such as conductive epoxy, and is
attached to the signal wire 202 in the single point of contact 203. Eventually,
signal contact also strengthens the improvement of insertion loss and reflection

attenuation covering a specific frequency range as compared with publicly known
structure.
[0032]
As mentioned above, the ridge waveguide 205 combines the signal from the
microstrip line 214 with the 1st rectangular waveguide. The rectangular
waveguide 207 is combined with the 2nd rectangular waveguide 215 which consists
of the upper part 208 and the lower part 212. The 2nd rectangular waveguide 215
has high height as compared with the height of the 1st (for example, it is shown
in Fig.5 like) rectangular waveguide 207 so that it may be illustrated. The
length of the 1st rectangular waveguide 207 should care about that it may be
smaller than the length of the 2nd rectangular waveguide 215. In one typical
embodiment, the length of the 1st rectangular waveguide 207 may be comparatively
small, or the 1st rectangular waveguide 207 may actually omit the whole.
[0033]
The 2nd rectangular waveguide 215 acts as 1/4 substantial wavelength converter
in which the impedance between the 1st rectangular waveguide 207 and the
circular waveguides 209/211 is adjusted. The 2nd rectangular waveguide 215
provides the angle conversion between the 1st waveguide 207 and the circular
waveguide 209. Various higher order waveguide modes are supported by the
waveguide of STA200. The 2nd rectangular waveguide 215 promotes conversion in
the rule mode of the circular waveguide 209 in these modes.
[0034]
Next, the signal from the 2nd rectangular waveguide 215 is combined with the
circular waveguide 211 after being combined with the circular waveguide 209.
Electric power may be supplied to the outputting part 213 of the circular
waveguide 211 by antenna feed or other circular-waveguide devices. Itself of the
circular waveguides 209/211 may be the antenna feed of an antenna. This is only
illustration and the outputting part should care about that it may combine with
other waveguides which are not circular.
[0035]
** impedance adjusts substantially the waveguide of each other with which STA200
adjoins, and it is useful. For this reason, both the conversion to the 1st
rectangular waveguide 207 from the ridge waveguide 205, the conversion to the
2nd rectangular waveguide 215 from the 1st rectangular waveguide 207, and the
conversion to the circular waveguides 209/211 from the 2nd rectangular waveguide
215 are adjusted. Thereby, a reflection decreases and it improves the insertion
loss and reflection attenuation within space limited as compared with publicly
known structure, or a small device.
[0036]
Each of the component 201 and a bottom plate may really be an element. Or the
component 201 may be single element structure. STA200 may be the suitable metal
for signal transmissions or the product made from an alloy in the specific
frequency range. For example, STA200 may be copper, brass, aluminum, or those
products made from an alloy. Anyway, STA200 is a signal-transmission device of
the waveguide base which does not include the dielectric material (except for
air) which caused the tangent loss which cannot be disregarded. This improves an
insertion loss characteristic as compared with publicly known structure. In the
typical embodiment described on these Descriptions, the dimension of various
elements of STA200 is chosen so that a desired ** impedance match and mode
consistency may be given. Of course, this is applied also like the embodiment
described in relation to Fig.1 and Fig.6 thru/or Fig.11. At the last, this
structure is a small dimension which can become advantageous for many uses, such
as ACC, and is useful. Partially, this is performed that use the waveguide of
STA200 as a detail part and a waveguide converts to the next from one, and by
polymerizing between waveguides.
[0037]
The waveguide of STA200 should care about that it is not what is illustration of
an embodiment and means limiting to it. For this reason, it is usable in the
waveguide and impedance conversion device except having mentioned above. For
example, an elliptical form waveguide is usable instead of a circular waveguide.
More [ that it is less or ] waveguides and converters are usable. If required to
improve consistency finally, a tuning element (not shown) is also usable.
[0038]
Fig.6 shows three-channel STA300 according to typical 1 embodiment of the

present invention. Although STA300 is substantially [ as STA200 substantially
shown in Fig.2 thru/or Fig.5 with the same element and the point which consists
of material ] the same, in the single component 301, it has three individual STA
devices and can transmit three signals. For this reason, as not described
vaguely, the description of an element common to the embodiment of Fig.2 thru/or
Fig.5, and Fig.6 as much as possible, material, the characteristics, and use is
as above-mentioned. STA300 should further care about that it may consist of a
plurality of signal conversion equipment described in relation to the Fig.7
thru/or Fig.11 described [ the Fig.1 and here ] it mentioned above here.
[0039]
STA300 possesses the component 301 which has the three individual signal
conversion equipment 302,303,304. Each signal conversion equipment transmits a
specific channel (signal). STA has the bottom plate 308. Each inverter 302
thru/or 304 has the ridge waveguide 305 which connects STA300 to each signal
wire 306 of the microstrip line 307 connected to the device (not shown). The
microstrip line 307 is arranged on the bottom plate 308 which has the circular
waveguide 309 combined with each circular waveguide of the component 301. In
order to separate between the individual inverters 302 thru/or 304 sufficiently,
the separator 310 is arranged among the individual inverters 302 thru/or 304.
[0040]
A detail part may be sufficient as STA300 and it consists of an individual STA
fixed using [ both ] a suitable conductive anchorage which was mentioned above.
Or STA300 may be an integral part. By neither of the cases, STA300 can be
manufactured from the metal and the alloy which were mentioned above, and
includes a dielectric material (except for air). STA300 may consist of an STA
described by another typical embodiment, and the one or more individual signal
inverters 302 thru/or 304 may differ. For example, one of the signal conversion
equipment 302 thru/or 304 may be an embodiment of Fig.11, and others may be the
embodiments of Fig.2. Since two port STA300 is only illustration, more or fewer
ports may be used. For example, a certain ACC incorporates five beams or seven
beam antennas for wider angle detection. For this reason, deformation of five
ports of the embodiment of Fig.6 or seven ports will be easily converted to five
signals or seven signals, respectively.
[0041]
STA300 illustrated is used as three antenna feed for individual channels of ACC
(not shown). It is installed in vehicles, a reflection of the signal which an
antenna emits is based, and ACC provides predetermined control of vehicles
useful. The antenna of this typical embodiment has three antenna elements which
form the antenna pattern (robe) which covers the area before vehicles and both
sides were decided to be. Since the specified quantity of the lane of vehicles
and one side of vehicles is covered ****, it is required to transmit the beam of
an ACC signal at sufficient big arc length. However, when arc length is too
long, incorrect reading and the incorrect reaction of ACC may arise as a result
of the unnecessary reflection from a road side or other vehicles. ACC must emit
the beam which does not have a shadow, i.e., a node, substantially.
[0042]
Although an antenna pattern enables exact detection of the object of vehicles
and a vehicles way for the small structure of the component 301 and the
individual signal conversion equipment 302 thru/or 304, it is not such big width
that the vehicles of the distant place of vehicles way outside are detected. Use
of the circular waveguide as antenna feed is useful although a sharp signal beam
is formed in vertical and horizontal both with the antenna of limited space.
With the form of the circular waveguide 309, when the wall of the separator 310
is mounted in the bottom plate 308, the big touch area in contact with the
bottom plate 308 is provided. Thereby, sufficient separation of the signal of
one channel from a neighboring channel is strengthened. Of course, thereby, the
channel separation of an antenna pattern and also the performance of ACC are
improvable.
[0043]
Fig.7 thru/or Fig.9 show another typical embodiment. In this embodiment, many
characteristics, material, the characteristic, and use are the same as the
characteristics etc. which were mentioned above in relation to the typical
embodiment. The description of a common element, structure, and material is not
repeated as much as possible so that the description of this embodiment may not

be made indefinite.
[0044]
STA400 has the component 401 arranged on the bottom plate 415 so that it can be
most clearly [ in Fig.8 and Fig.9 ] seen. The microstrip line 214 is arranged on
the bottom plate 415, and the state of fixing to the bottom plate directly using
electroconductive glue, such as solder or suitable conductive epoxy (not shown),
is illustrated. In the single point 403, the stub 402 is connected to the ridge
waveguide 410 using conductive materials, such as conductive epoxy and solder,
in the signal wire 202 of the microstrip line 214, and another point 417. The
ridge waveguide 410 is arranged by the lower part of the bottom plate 415 so
that it may be illustrated. Since the height difference between the upper
surface 406 of the bottom plate 415 and the upper stage 418 of the ridge
waveguide 410 is suited, the stage 404 may be provided between the bottom level
405 and the upper surface 406. The stub 402 can orient with the same level
substantially by this with the upper stage 418 of the signal wire 202 and the
ridge waveguide 410, and it can become another side and a level whose upper
surface of ridge waveguide is perpendicularly lower than the level of the upper
surface 406.
[0045]
The dimension of the material used for the stub 402 and the stub 402 is chosen
so that the suitable impedance conversion from the microstrip line 214 to the
ridge waveguide 410 may be attained. Especially the stub 402 is the substantial
same-axis-like transmission line which carries out the impedance match of
between the microstrip line 214 and ridge waveguide substantially. The stub 402
converts the quasi TEM mode of a micro stripe to the mode of the ridge waveguide
410 efficiently.
[0046]
The ridge waveguide 410 has at least one step of 407 so that it may look best to
Fig.9. The ridge waveguide 410 acts as an impedance converter between the stub
402 and the 1st rectangular waveguide 408, and the component 401 has the region
416 covering the ridge waveguide 410 and the 1st rectangular waveguide 408. The
2nd rectangular waveguide 409 is more expensive than the height of the 1st
rectangular waveguide 408, and has the portion 411,412 in the component 401 and
the bottom plate 415, respectively. Since the impedance between the 1st
rectangular waveguide 408 and the circular waveguide 413 is adjusted, the
dimension of the 2nd rectangular waveguide 409 has a perpendicularly bigger
dimension than the 1st rectangular waveguide 408. The 2nd rectangular waveguide
409 promotes carrying out mode conversion of the primary mode and higher mode of
the ridge waveguide 410 and the 1st rectangular waveguide 408 to the rule mode
of the circular waveguide 409.
[0047]
Like an above-mentioned embodiment, each conversion between the waveguides with
which STA400 adjoins is adjusted to ** impedance, improves performance and it
provides small structure. With the impedance and the mode converter which
consists of the stub 402, the ridge waveguide 410, and the 1st and 2nd
rectangular waveguides 408,409, The high frequency electromagnetism signal from
the micro stripe 214 can be made to be able to denote by an outputting part, and
it can emanate in the direction which intersects perpendicularly with the first
propagating direction in alignment with the micro stripe 214 substantially.
Finally, the outputting part 414 is combined with an antenna or other elements
(not shown).
[0048]
In the typical embodiment shown in Fig.7 thru/or Fig.9, a suitable anchorage,
solder, or conductive epoxy, such as a screw, may be used for the component 401,
and it may fix it to the bottom plate 415. Although the embodiment shown in
Fig.7 thru/or Fig.9 provides Fig.2 thru/or the substantially same electrical
performance as the embodiment of Fig.5, since parts are fixed to the whole
surface of STA400 with epoxy or solder, an assembly is easier for this typical
embodiment. Especially the connection between the micro stripe 214 and the
circular waveguide 413 only needs to solder a stub on a same part, i.e., the
bottom plate 415. Then, the component 401 is fixed as mentioned above. To a
convenient thing, this can attain higher manufacture tolerance by a easier
assembly process. STA400 should care about that it may be an integral part or a
detail part, and they may be suitable metal/product made from an alloy for the

selected frequency. STA400 does not include a dielectric material except for air
like another embodiment.
[0049]
Fig.10 shows STA500 according to another typical embodiment of the present
invention. STA500 is substantially [ as STA200 of the typical embodiment of
Fig.2 thru/or Fig.5 ] the same except for the point which is the ridge waveguide
502 with which the ridge waveguide which has the component 501 and is used for
impedance conversion curved.
[0050]
Fig.11 shows STA600 according to another typical embodiment of the present
invention. STA600 is substantially [ as the embodiment of Fig.2 thru/or Fig.5,
and Fig.10 ] the same except for the form of the ridge waveguide used for
impedance conversion. In particular, the ridge waveguide 602 of tapered shape is
arranged in the component 601.
[0051]
Fig.12 thru/or Fig.14 show comparison of the performance data of a typical
embodiment mentioned above, and the performance data of a typical embodiment
described to the publicly known device. An operation and the range of
performance should care about that it is only illustration.
[0052]
Fig.12 is the graph 700 which shows the simulation result of STA according to
the typical embodiment 701, and insertion loss versus the frequency of the
publicly known device 702. The insertion loss of a publicly known device is a
larger order of about 0.10 dB - about 0.70 dB than STA of a typical embodiment
so that he can understand easily from the graph 700.
[0053]
Fig.13 is the graph 800 which shows the simulation result of STA according to
the typical embodiment 801, and reflection attenuation versus the frequency of
the publicly known device 802. The reflection attenuation of a publicly known
device is an order with smaller 15-dB reflection attenuation bandwidth of STA of
a typical embodiment than 0.5 time so that he can understand easily from the
graph 800.
[0054]
Fig.14 is the table 900 showing the measurement output power data of publicly
known 3 port device (902) of the three typical ports STA and ACC of ACC (901) in
which each operates with the nominal value of 76.5 GHz. The difference between
STA of a typical embodiment and the output power of a publicly known device is
in a range of about 0.22 dB and about 0.78 dB so that I may be easily understood
from a table.
[0055]
As mentioned above, although the embodiment of the present invention was
described, probably, it will be clear that a person skilled in the art can
change and change the present invention by many methods of having the
convenience of this disclosure. Probably such change will not be regarded as
what deviates from the essence and the range of the present invention, but, as
for such deformation, it will be clear to a person skilled in the art to have
intention of being contained in Claims and the range of the equivalent.
[0056]
[Drawing 1]It is a key map of the signal conversion equipment according to one
embodiment of the present invention.
[Drawing 2]It is a perspective view showing the signal conversion equipment
according to one embodiment of the present invention.
[Drawing 3]It is a partial decomposition perspective view of the signal
conversion equipment of Fig.2.
[Drawing 4]It is a partial decomposition perspective view of the signal
conversion equipment of Fig.2.
[Drawing 5]It is the cross sectional view which was along five to 5 line of
Fig.2.
[Drawing 6]It is a partial decomposition perspective view of signal conversion
equipment according to one embodiment of the present invention which has a
plurality of signal coupling devices.
[Drawing 7]It is a perspective view showing the signal conversion equipment
according to one embodiment of the present invention.

[Drawing 8]It is a partial decomposition perspective view showing the signal
conversion equipment according to one embodiment of the present invention.
[Drawing 9]It is the cross sectional view which was along nine to 9 line of
Fig.8.
[Drawing 12]It is a graph of insertion loss versus the frequency of signal
conversion equipment and a publicly known device according to one embodiment of
the present invention.
[Drawing 13]It is a graph of S11 parameter (reflection attenuation) opposite
frequency of signal conversion equipment and a publicly known device according
to one embodiment of the present invention.
[Drawing 14]It is a table of the output power of 3 port device and a publicly
known device according to one embodiment of the present invention.
[0057]
100, 200, and 300,400,500,600 Signal conversion equipment
102 The 1st waveguide
103 The 2nd waveguide
104 The 3rd waveguide
107 Angle
108,210,308,415 Bottom plate
109, 201, and 301,401,501,601 Component
110 The 4th waveguide
205, 305,410,502,602 ridge waveguide
207,408 Rectangular waveguide
209,309,409 Circular waveguide
215,413 Another rectangular waveguide
Next
Representative drawing 1 2 3 4 5 6 7 8 9 10 11 12 13 14
[Translation done.]
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CLAIMS
TECHNICAL FIELD
PRIOR ART
TECHNICAL PROBLEM
MEANS
DRAWINGS
* NOTICES *
[0001]
The present invention relates to the equipment according to claim 1.
[0002]
In many application examples of ultrahigh frequency technology, it is necessary
to input into a waveguide the wave guided [ especially ] in a microstrip line
with millimeter wave technology, and to perform the reverse again. In that case,
junction without a reflection or a loss is desired as much as possible. This
junction brings about that impedance suits mutually between a waveguide and the
strip line, and the field pattern of one waveguide form is moved to the field
pattern of the waveguide form of another side in the limited frequency range.
[0003]
The equipment for microstrip line-waveguide-junction is publicly known by the
Germany patent publication of unexamined application No. 19741944 Description or
the US,6265950,B Description, for example.
[0004]
With the equipment stated to the Germany patent publication of unexamined
application No. 19741944 Description, the microstrip line is laminated on the
upper surface of the substrate (Fig.1). As for the waveguide HL, one transverse
plane is attached to the lower surface of the substrate S. The substrate S has
the opening D to the region of the waveguide HL, and this opening D is
corresponding to the cross section of the waveguide HL substantially. The
connecting factor child (not shown) is stationed in the microstrip line ML, and
this connecting factor child has projected in the opening D. The opening D is
enclosed by shielding cap SK on the upper surface of the substrate S, and this
shielding cap SK is connected conductively to metallizing RM on the lower
surface of the substrate S by the conductive punching (viahole) VH.
[0005]
This equipment has a defect which must maintain conductivity at the base
material board containing the waveguide HL processed preliminarily, and must
attach a printed circuit board to it. Shielding cap SK which must position
correctly strictly in finisher, and must maintain and laminate conductivity is
indispensable. Since manufacture of this equipment has many steps of various
processings, it requires time and expense. Other defects arise according to the
space demand being high in because of that of the waveguide arranged at the
outside of a printed circuit board.
[0006]
In the equipment for junction between the microstrip line and waveguide which
were stated to the US,6265950,B Description, the substrate and the microstrip
line laminated on it have projected in the waveguide. That the waveguide is
united with the circumference of a printed circuit board has a defect of this
equipment. A waveguide can only be arranged at the interface of a printed
circuit board (substrate). Unification of the waveguide inside a printed circuit
board is not possible from the Reason which requires expense for preparation of
a printed circuit board.

[Patent document 1] The Germany patent publication of unexamined application No.
19741944 Description
[Patent document 2] US,6265950,B Description
[0007]
The problem given to the present invention is providing the equipment for
junction between the microstrip line and waveguide which can be realized simply
inexpensive and need only the slight space demand.
[0008]
This problem is solved by the equipment which has the characteristics of Claim
1. The advantageous composition of this equipment is the objects of dependent
claim.
[0009]
Equipment concerning the present invention for junction between a microstrip
line and a waveguide,
The microstrip line laminated on the upper surface of - dielectric substrate,
The waveguide laminated on the upper surface of the substrate which it has the
stair-like structure formed in at least - one transverse plane in the region of
a hole and this hole at one side wall, and this structure is connected
conductively to a microstrip line by at least one copy, and consists of a
metallization layer by which the side wall of the waveguide was formed on the
substrate,
The concave part which is carried out by - metallization layer and made the
microstrip line project inside,
Back surface metallizing formed in the back surface of - substrate,
The conductive through hole which was formed between the metallization layer on
the upper surface of - substrate and back surface metallizing and which encloses
a concave part is included.
[0010]
Manufacture of the equipment for micro stripe waveguide-junction has an
advantage of the equipment concerning the present invention in it being easy and
being inexpensive. There are few parts indispensable to realize junction unlike
the present technology. Other advantages are the things which it must not be
carried out on the edge of a printed circuit board, and can be performed in any
part on a printed circuit board so that in the US,6265950,B Description in
mounting of the waveguide to the circumference of a printed circuit board.
Therefore, the equipment concerning the present invention needs only the slight
space demand.
[0011]
A waveguide is an SMD component (surface mounted device) advantageously. For
this reason, a waveguide section article is attached and connected conductively
to a printed circuit board from a top in 1 time of an attachment step. The
connection of a waveguide with the equipment for junction can be united with the
publicly known mounting method in this way. Production steps are reduced by this
and, thereby, manufacturing expense and production time decrease.
[0012]
Other advantageous composition of the equipment concerning the present invention
and the present invention is described in detail based on Drawings below.
[Description of Embodiments]
[0013]
Fig.2 shows the metallization layer of a substrate with a plan view. This
metallization layer is also called the land structure for micro stripe
waveguide-junction. Land structure LS has the concave part A provided with the
hole OZ. The microstrip line ML installed in this hole OZ is carrying out
termination inside the concave part A. The concave part A is enclosed by the
through hole VH called a viahole. These through holes VH are the openings to
which conductivity of the substrate was given, and are connected with back
surface metallizing (not shown) to which land structure LS is given in a
substrate rear. The mutual distance of the viahole VH is chosen narrowly and
radiation of the electromagnetic waves which let the gap pass in the use
frequency range is small. Since the viahole VH reduces radiation, it can also be
installed in a plurality of sequences arranged in parallel advantageously

mutually.
[0014]
Fig.3 is a perspective view of the exemplary stair-like internal structure of an
SMD component. The part B has hole alumnus too in accordance with the hole
(refer to Fig.2) in the concave part of land structure. The distance which can
be set up from hole alumnus by the longitudinal direction of parts is kept, and
stair-like structure ST1 and ST are formed in the side wall. The side wall
containing stairs structure ST1 of the part B and ST opposes to a substrate
surface after attachment of land structure LS (refer to Fig.4). The opening of
the waveguide section article B which should be laminated is carried out in the
lower part (substrate direction) before attachment, and, for the reason, it is
still imperfect. A chipped side wall is formed by land structure LS formed on
the substrate.
[0015]
The equipment concerning the present invention is not further limited by the
number of the stairs shown in Fig.3 or Fig.4. Structure ST can fit the length
and width of the number of stairs, and each stairs to the requirements for
junction of each time. Naturally it is also possible to realize continuous
junction. Stairs ST1 is directly placed on the microstrip line ML, and the
stairs set to code ST1 in this figure have the height which realizes conductive
connection between the microstrip line ML and the part B in this way, when the
part B is laminated on the land structure by Fig.2 at a form junction type.
[0016]
Fig.4 shows the equipment concerning the present invention of the equipment for
micro stripe waveguide-junction with drawing of longitudinal section. In that
case, the component B of Fig.3 is laminated on the land structure of the
substrate S of Fig.3 at the form junction type. Especially the part B is
laminated on a substrate so that conductive connection may arise between land
structure and the part B.
[0017]
The substrate S has continuous metallic coating RM substantially on the lower
surface. The waveguide region is set to code HB in this figure. A junction area
is the code UB.
[0018]
The equipment for micro stripe waveguide-junction concerning the present
invention functions according to the following principles. The high frequency
signal of the outside of the waveguide HL is guided by impedance Z0 through the
microstrip line ML (region 1). The high frequency signal inside waveguide HL is
guided in the mode of TE10 waveguide dominant mode. The junction UB changes the
field pattern in micro stripe mode to the field pattern of waveguide mode in
stepping. Simultaneously, the converting operation of the junction UB is carried
out about a characteristic impedance by stairs-ization of the part B, and
impedance Z0 is fitted to impedance ZHL of the waveguide HL in a use frequency
range. Thereby, a loss and little reflective junction are attained among both of
waveguides.
[0019]
It lets the microstrip line ML pass in the so-called region 2 of a cutoff
channel first. This channel is formed by the part B, back surface metallizing
RM, and the viahole VH, and the viahole VH forms conductive connection between
the part B and back surface metallizing RM. In this region 2, except the micro
stripe mode in which a signal is guided, the width of the cutoff channel is
chosen so that an additional waveform type cannot be spread. The length of a
channel determines attenuation of the waveguide mode which cannot be spread and
which is not desirable, and prevents radiation into free space (region 1).
[0020]
In the region 3, the microstrip line ML is in a kind of partial packing
waveguide. A waveguide is formed by the part B, back surface metallizing RM, and
the viahole VH (Fig.5). The stair-like structure of the part B is connected with
the microstrip line ML in the region 4 (Fig.6). The side wall of the part B is
connected conductively to back surface metallizing RM of the substrate S by what
is called a shielding sequence which consists of the viahole VH. Thereby, the
ridge waveguide by which dielectric load is carried out is obtained. Signal
energy is concentrated between the ridges formed by back surface metallizing RM,
and the microstrip line ML and stairs ST1 of the part B.

[0021]
If the height of stairs structure ST contained in the part B in the region 5 as
compared with the region 4 is decreasing and the part B is assembled at a form
junction ceremony on land structure LS of the substrate S, the restrictive gap L
will produce between a substrate material and stairs structure ST (Fig.7). The
side wall of the part B is connected conductively to back surface metallizing RM
through the viahole VH. Thereby, the partial packing ridge waveguide by which
dielectric load is carried out is obtained.
[0022]
The width of stairs is extended in order to adjust the field pattern from the
region 4 to the field pattern of waveguide mode gradually (region 6). The
length, the width, and the height of stairs are chosen so that impedance Z0 in
micro stripe mode may be converted to impedance ZHL of waveguide mode at the
last of the region 6. If required, the number of stairs within the structure of
the part B can also use the ridge which could also increase in the region 5 or
was taper-ized continuously.
[0023]
The region 6 shows waveguide region HB. The part B forms the side wall and lid
of the waveguide HL. A waveguide bottom is formed by land structure LS of the
substrate S, namely, it is comparing with the region 5, and there is no
dielectric packing into the Maya waveguide HL.
[0024]
The single or multiple shielding sequence which consists of the viahole VH which
crosses and extends the direction of waveguide wave propagation in the junction
area between the region 5 and the region 6 realizes junction between the
waveguide by which the dielectric filling was carried out partially, and the
waveguide which filled up purity with air. A signal input is simultaneously
prevented between land structure LS and back surface metallizing by these
shielding sequences.
[0025]
In the region 6, stairs structure can also be provided in the cap upper part
selectively (region 5 is the same as that of stairs structure). The length and
the height of these stairs are chosen so that it may be converted to impedance
ZHL of the waveguide mode which has impedance Z0 in micro stripe mode in the
last of the region 6 in combination with another region like the region 5.
[0026]
Other advantageous embodiments of the equipment for micro stripe waveguide-
junction concerning the present invention are shown in Fig.9. It is possible to
realize easy and inexpensive waveguide junction which can output a high
frequency signal from the continuous waveguide hole DB caudad included in the
substrate through the substrate S as this embodiment is also. The waveguide hole
DB has a conductive wall (IW) advantageously. The part B has staircase shape ST
advantageously on the side wall which opposes to the region of the opening DB in
the waveguide hole DB. 90 degrees of waveguide waves DB are turned into the
waveguide hole DB of the substrate S from the waveguide region HB of the part B
as this staircase shape ST is also. Other waveguides or radiating elements can
be arranged on the lower surface of the substrate S in the region of the
waveguide hole DB. In this example of Fig.9, other support material TPs, for
example, monolayer, multilayer printed boards, or metallic support bodies are
attached to back surface metallizing RM. Compared with the Germany patent
publication of unexamined application No. 19741944 Description, the structure of
the substrate S and support material TP has an advantage of this equipment in it
being simple and being much more inexpensive. Milling of the waveguide hole is
carried out continuously, and a wall is metalized by electroplating. Both of
operation steps are the standard methods which can be carried out easily [ usual
] in printed circuit board technology.
[0027]
[Drawing 1]It is drawing of longitudinal section of the equipment for micro
stripe waveguide-junction by the present technology.
[Drawing 2]A plan view shows the metallization layer on the upper surface of a
substrate.
[Drawing 3]It is a perspective view of the exemplary stair-like internal
structure of an SMD component.

[Drawing 4]It is drawing of longitudinal section of the equipment for micro
stripe waveguide-junction concerning the present invention.
[Drawing 5]It is the 1st cross-sectional view of the region 3 shown in Fig.4.
[Drawing 6]It is the 2nd cross-sectional view of the region 4 shown in Fig.4.
[Drawing 7]It is the 3rd cross-sectional view of the region 5 shown in Fig.4.
[Drawing 8]It is the 4th cross-sectional view of the region 6 shown in Fig.4.
[Drawing 9]Other advantageous embodiments of the equipment for micro stripe
waveguide-junction concerning the present invention are shown.
Next
Representative drawing 1 2 3 4 5 6 7 8 9
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CLAIMS
TECHNICAL FIELD
PRIOR ART
TECHNICAL PROBLEM
MEANS
EXAMPLE
DRAWINGS
* NOTICES *
[0001]

[Field of the Invention]The present invention relates to the connection
structure of the dielectric waveguide line and the line conductor for high
frequency which can connect the dielectric waveguide line which is the
transmission line which transmits the high frequency signal of a microwave band,
a millimeter wave belt, etc., and line conductors for high frequency, such as a
microstrip line, by low-loss.
[0002]
[Description of the Prior Art]In recent years, he can be proceeding briskly
research of the mobile communications using the high frequency signal of a
microwave band, a millimeter wave belt, etc., the radar between vehicles, etc.
As the transmission line for high frequency for transmitting a high frequency
signal in these high frequency circuits, line conductors for high frequency,
such as a coaxial track, a waveguide, a dielectric waveguide line and a
microstrip line, and the strip line, etc. are known conventionally.
[0003]These days, since multiple high frequency lines where kinds differ are
arranged in the wiring circuit which constitutes a high frequency circuit, the
connection technology between [ these ] high frequency lines has become
important, and various structures about the connection structure are proposed.
[0004]For example, in the connection structure of a waveguide or a dielectric
waveguide, and a coaxial track, it is connected by inserting the signal wire of
a coaxial track into a waveguide, and joining together in high frequency.
[0005]In the connection structure of a waveguide and a microstrip line, when
making a waveguide and a microstrip line intersect perpendicularly and
connecting, the structure which inserts into a waveguide the dielectric
substrate in which the microstrip line was formed is used. When connecting a
waveguide and a microstrip line in a parallel direction, the structure inserted
in the inside what is called of ridge waveguide which narrowed the line
conductor of the microstrip line the shape of a curve toward the end which
connects is known.
[0006]
[Problem to be solved by the invention]It continues till these days, and since
it will become advantageous in respect of a miniaturization if a high frequency
line is formed on the substrate which a high frequency circuit comprises, or in
a substrate, to form a dielectric waveguide line with layering technique in the
wiring substrate of multilayer structure is desired. For example, in JP,6-
53711,A, a dielectric substrate is pinched by a pair of initiative body whorl,
and the waveguide line which formed the side wall by the via-hole group arranged
by two rows which connect between conductor layers further is proposed. This
waveguide line makes the region within a conductor wall the track for signal
transmissions by surrounding the four quarters of dielectric materials with the
pseudo conductor wall by a pair of initiative body whorl and via-hole group.
[0007]When mainly using the dielectric waveguide line of the lamination type
arranged inside such a multilayer interconnection board as the ceramic
multilayer interconnection board for microwave and millimeter waves, or the
transmission line of the semiconductor package for high frequency, connection
with other high frequency circuits is needed.
[0008]On the other hand, as a connection structure of the dielectric waveguide
line of a lamination type, and a microstrip line, the connection structure using
the electromagnetic combination by the slot hole provided to the initiative body
whorl of the dielectric waveguide line as shows a schematic structure to Fig.4
with a perspective view is proposed.
[0009]According to Fig.4, to the dielectric waveguide line 5 of the above-
mentioned lamination type which comprises the side wall 4 formed by penetration
conductor groups, such as a via-hole group arranged by two rows which sandwich
the dielectric substrate 1 by the pair of initiative body whorls 2.3, and
connect between the initiative body whorls 2-3 further, The slot hole 6 for
inductive coupling is formed in the initiative body whorl 2 of one of these, and
by this, the line conductor 8 and the dielectric waveguide lines 5 of a high
frequency line, such as a microstrip line formed on the multilayer
interconnection board 7 etc., are combined with an electromagnetic target, and
it connects.
[0010]According to this connection structure, inductive coupling can be easily
carried out to other line conductors for high frequency by forming the slot hole
6 in a part of initiative body whorl 2. And the multilayer interconnection board

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