A compact dual-WLAN-band antenna, in the shape of a paper clip, is presented. The antenna can easily be manufactured by bending few times a single copper wire with a length of about 65 mm, and operates in the 2.4 and 5.2 GHz bands in the WLAN environment. In addition to the simple configuration, the antenna is easily fed by 50- mini-coaxial cable, which allows it flexibility in a defined location for installation. An experimental prototype of the proposed antenna with the overall dimensions about 5 mm x 23.5 mm is constructed, tested, and demonstrated.
Very-Low-Cost Copper-Wire Antenna for 2.4-GHz WLAN OperationSaou-Wen Su
A very-low-cost copper-wire antenna, easily fabricated by bending a single 70-mm-long copper wire two times, for WLAN operation in the 2.4 GHz band (2400-2484 MHz) is presented. The antenna has a very simple structure and is easily fed by using a 50- mini-coaxial cable. A prototype of the proposed antenna with the overall dimensions 40 mm x 5 mm is constructed and tested.
Printed Omnidirectional Access-Point Antenna for 2.4/5-GHz WLAN OperationSaou-Wen Su
A new design of the printed omnidirectional antenna for applications in 2.4/5-GHz dual-WLAN-band access points is proposed. The antenna consists of a conventional collinear antenna for 2.4 GHz operation and two U stubs for 5 GHz operation. The two U stubs are located near the points where the maximum currents at about 5.5 GHz occurring on the strips of the collinear antenna, and arranged back to back in the same phase for achieving better antenna gain. Detailed analyses of the U stub on the impedance matching over the 5 GH band is presented. A prototype with good omnidirectional radiation across the 2.4/5-GHz WLAN bands is demonstrated.
Printed Coplanar Two-Antenna Element for 2.4/5 GHz WLAN Operation in a MIMO S...Saou-Wen Su
A printed coplanar two-antenna element suited for WLAN operation in the 2.4 and 5 GHz bands for dual-module applications in a MIMO system is proposed. The two-antenna element is comprised of one planar inverted-F antenna (PIFA) and one monopole antenna, both printed and integrated in a coplanar configuration on a narrow dielectric substrate with the dimensions 50 mm × 11 mm. The two antennas are excited using two separate feeds with a common ground plane. By utilizing two proposed elements spaced 10 mm apart in the lateral direction with an optimized arrangement, the four-antenna MIMO system obtained can achieve optimal isolation between any two of the four antennas. In comparison with the conventional dual-band antenna with a single feed, the proposed two-antenna element allows the 2.4 and 5 GHz signals to be simultaneously received or transmitted with no external switch circuit between the antenna and modules required.
Low-Cost Flat Metal-Plate Dipole Antenna for 2.4/5 GHz WLAN OperationSaou-Wen Su
A low-cost, one-piece, flat-plate dipole antenna for dual WLAN band operation is presented. The dipole antenna is rectangular in shape with the dimensions 10 mm × 37 mm and fed by 50-ohm mini-coaxial cable. By cutting two L-shaped slits in each radiating arm, two dipole arms are obtained, which form a larger dipole and a smaller dipole antennas for the 2.4 and 5 GHz band operation respectively. The dipole arms are further short-circuited, making it possible for the antenna to be fabricated by stamping a single, flat metal plate only. The impedance bandwidth for 2.4/5 GHz WLAN operation is with VSWR below 1.5 and good omnidirectional radiation patterns are also observed.
Hybrid of Monopole and Dipole Antennas for Concurrent 2.4- and 5-GHz WLAN Acc...Saou-Wen Su
A novel hybrid of a 2.4-GHz monopole antenna and a 5-GHz dipole antenna is presented to provide concurrent 2.4 and 5 GHz band operation for access- point applications. The two antennas are arranged in a collinear structure and printed on a compact dielectric substrate with dimensions 12 mm × 60 mm. The monopole antenna has a meandered radiating strip and is short-circuited to a small ground plane through a shorting strip. The dipole antenna includes two sub-dipoles at the opposite side of a narrow ground plane and fed by a simple T-junction microstrip-line network. The two antennas are closely set with a distance of 1 mm only, yet good port isolation (S21) well below –20 dB can be obtained. With a low profile, the proposed design can easily fit into the casing of some standard access points and allow the 2.4 and 5 GHz band signals to be simultaneously received or transmitted with no external diplexer required. Good omnidirectional radiation has been observed too.
Integration of Internal 700 MHz and WLAN/WiMAX Antennas for Palm-Sized Mobile...Saou-Wen Su
Two promising, internal, shorted monopole antennas for 700 MHz and WLAN/WiMAX operation are combined in an arrangement with minimized mutual coupling for palm-sized mobile applications. The two stamped, metal-plate antennas with a 2 mm gap therein between can be integrated into a compact configuration and are then mounted near one side of the system circuit board. With the suitable shorting locations and arrangement of the two antennas, good isolation (S21 < –20 dB) between the two ports can easily be obtained. Analysis of placing a CCD shielding cylinder between the two antennas and the two shorting strips joined to form a shorting wall are also conducted. Detailed designs of the two antennas are described, and the results thereof are discussed.
2009 EuCAP-Hybrid of Monopole and Dipole Antennas for Concurrent WLAN APSaou-Wen Su
A novel hybrid of a 2.4-GHz monopole antenna and a 5-GHz dipole antenna is presented to provide concurrent 2.4 and 5 GHz band operation for access- point applications. The two antennas are arranged in a collinear structure and printed on a compact dielectric substrate with dimensions 12 mm × 60 mm. The monopole antenna has a meandered radiating strip and is short-circuited to a small ground plane through a shorting strip. The dipole antenna includes two sub-dipoles at the opposite side of a narrow ground plane and fed by a simple T-junction microstrip-line network. The two antennas are closely set with a distance of 1 mm only, yet good port isolation (S21) well below –20 dB can be obtained. With a low profile, the proposed design can easily fit into the casing of some standard access points and allow the 2.4 and 5 GHz band signals to be simultaneously received or transmitted with no external diplexer required. Good omnidirectional radiation has been observed too.
An Internal Wideband Monopole Antenna for UMTS/WLAN Dual-Mode Mobile PhoneSaou-Wen Su
An internal wideband metal-plate monopole antenna for mobile phone applications is presented. The antenna is easily fabricated by bending a single metal plate and suitable to be embedded within the casing of a mobile phone as an internal antenna. Further, the antenna shows a wide operating bandwidth of about 5 GHz (about 1.8−6.7 GHz), making it easy to cover the UMTS band and the 2.4/5.2/5.8 GHz WLAN bands for mobile/WLAN dual-mode operation for a mobile phone.
Very-Low-Cost Copper-Wire Antenna for 2.4-GHz WLAN OperationSaou-Wen Su
A very-low-cost copper-wire antenna, easily fabricated by bending a single 70-mm-long copper wire two times, for WLAN operation in the 2.4 GHz band (2400-2484 MHz) is presented. The antenna has a very simple structure and is easily fed by using a 50- mini-coaxial cable. A prototype of the proposed antenna with the overall dimensions 40 mm x 5 mm is constructed and tested.
Printed Omnidirectional Access-Point Antenna for 2.4/5-GHz WLAN OperationSaou-Wen Su
A new design of the printed omnidirectional antenna for applications in 2.4/5-GHz dual-WLAN-band access points is proposed. The antenna consists of a conventional collinear antenna for 2.4 GHz operation and two U stubs for 5 GHz operation. The two U stubs are located near the points where the maximum currents at about 5.5 GHz occurring on the strips of the collinear antenna, and arranged back to back in the same phase for achieving better antenna gain. Detailed analyses of the U stub on the impedance matching over the 5 GH band is presented. A prototype with good omnidirectional radiation across the 2.4/5-GHz WLAN bands is demonstrated.
Printed Coplanar Two-Antenna Element for 2.4/5 GHz WLAN Operation in a MIMO S...Saou-Wen Su
A printed coplanar two-antenna element suited for WLAN operation in the 2.4 and 5 GHz bands for dual-module applications in a MIMO system is proposed. The two-antenna element is comprised of one planar inverted-F antenna (PIFA) and one monopole antenna, both printed and integrated in a coplanar configuration on a narrow dielectric substrate with the dimensions 50 mm × 11 mm. The two antennas are excited using two separate feeds with a common ground plane. By utilizing two proposed elements spaced 10 mm apart in the lateral direction with an optimized arrangement, the four-antenna MIMO system obtained can achieve optimal isolation between any two of the four antennas. In comparison with the conventional dual-band antenna with a single feed, the proposed two-antenna element allows the 2.4 and 5 GHz signals to be simultaneously received or transmitted with no external switch circuit between the antenna and modules required.
Low-Cost Flat Metal-Plate Dipole Antenna for 2.4/5 GHz WLAN OperationSaou-Wen Su
A low-cost, one-piece, flat-plate dipole antenna for dual WLAN band operation is presented. The dipole antenna is rectangular in shape with the dimensions 10 mm × 37 mm and fed by 50-ohm mini-coaxial cable. By cutting two L-shaped slits in each radiating arm, two dipole arms are obtained, which form a larger dipole and a smaller dipole antennas for the 2.4 and 5 GHz band operation respectively. The dipole arms are further short-circuited, making it possible for the antenna to be fabricated by stamping a single, flat metal plate only. The impedance bandwidth for 2.4/5 GHz WLAN operation is with VSWR below 1.5 and good omnidirectional radiation patterns are also observed.
Hybrid of Monopole and Dipole Antennas for Concurrent 2.4- and 5-GHz WLAN Acc...Saou-Wen Su
A novel hybrid of a 2.4-GHz monopole antenna and a 5-GHz dipole antenna is presented to provide concurrent 2.4 and 5 GHz band operation for access- point applications. The two antennas are arranged in a collinear structure and printed on a compact dielectric substrate with dimensions 12 mm × 60 mm. The monopole antenna has a meandered radiating strip and is short-circuited to a small ground plane through a shorting strip. The dipole antenna includes two sub-dipoles at the opposite side of a narrow ground plane and fed by a simple T-junction microstrip-line network. The two antennas are closely set with a distance of 1 mm only, yet good port isolation (S21) well below –20 dB can be obtained. With a low profile, the proposed design can easily fit into the casing of some standard access points and allow the 2.4 and 5 GHz band signals to be simultaneously received or transmitted with no external diplexer required. Good omnidirectional radiation has been observed too.
Integration of Internal 700 MHz and WLAN/WiMAX Antennas for Palm-Sized Mobile...Saou-Wen Su
Two promising, internal, shorted monopole antennas for 700 MHz and WLAN/WiMAX operation are combined in an arrangement with minimized mutual coupling for palm-sized mobile applications. The two stamped, metal-plate antennas with a 2 mm gap therein between can be integrated into a compact configuration and are then mounted near one side of the system circuit board. With the suitable shorting locations and arrangement of the two antennas, good isolation (S21 < –20 dB) between the two ports can easily be obtained. Analysis of placing a CCD shielding cylinder between the two antennas and the two shorting strips joined to form a shorting wall are also conducted. Detailed designs of the two antennas are described, and the results thereof are discussed.
2009 EuCAP-Hybrid of Monopole and Dipole Antennas for Concurrent WLAN APSaou-Wen Su
A novel hybrid of a 2.4-GHz monopole antenna and a 5-GHz dipole antenna is presented to provide concurrent 2.4 and 5 GHz band operation for access- point applications. The two antennas are arranged in a collinear structure and printed on a compact dielectric substrate with dimensions 12 mm × 60 mm. The monopole antenna has a meandered radiating strip and is short-circuited to a small ground plane through a shorting strip. The dipole antenna includes two sub-dipoles at the opposite side of a narrow ground plane and fed by a simple T-junction microstrip-line network. The two antennas are closely set with a distance of 1 mm only, yet good port isolation (S21) well below –20 dB can be obtained. With a low profile, the proposed design can easily fit into the casing of some standard access points and allow the 2.4 and 5 GHz band signals to be simultaneously received or transmitted with no external diplexer required. Good omnidirectional radiation has been observed too.
An Internal Wideband Monopole Antenna for UMTS/WLAN Dual-Mode Mobile PhoneSaou-Wen Su
An internal wideband metal-plate monopole antenna for mobile phone applications is presented. The antenna is easily fabricated by bending a single metal plate and suitable to be embedded within the casing of a mobile phone as an internal antenna. Further, the antenna shows a wide operating bandwidth of about 5 GHz (about 1.8−6.7 GHz), making it easy to cover the UMTS band and the 2.4/5.2/5.8 GHz WLAN bands for mobile/WLAN dual-mode operation for a mobile phone.
Concurrent 2.4/5-GHz Multi-Loop MIMO Antennas with Wide 3-dB Beamwidth Radiat...Saou-Wen Su
A high-gain, wide-beamwidth, six-loop-antenna MIMO system suited for wireless access points in the concurrent WLAN 2.4 and 5 GHz bands is presented. The antenna system mainly comprises an antenna ground plane and single-band loop antennas, among which the three antennas are designated for 2.4 and 5 GHz operation respectively. The antennas are set in a sequential, rotating arrangement on the ground plane with an equal inclination angle of 60° to form a symmetrical structure, and the 2.4 and 5 GHz loops are facing each other one by one. The experimental results show that good port isolation can be obtained between antenna ports. High-gain, directional radiation patterns with wide 3-dB beamwidth in elevation planes are also observed. Details of a design prototype are described and discussed in the paper.
Realization of Dual-Dipole-Antenna System for Concurrent Dual-Radio Operation...Saou-Wen Su
The study of the mutual coupling between the two simple strip dipole antennas is first carried out and investigated. The results show that the coupling or the antenna port isolation is almost separation distance independent when the two dipole antennas are arranged to be of orthogonal polarization. Following this characteristic, a novel dual-dipole-antenna system aimed for concurrent 2.4 and 5 GHz band operation and at the same time, to achieve very compact integration of two individual antennas with separate feeds is proposed. The two dipole antennas are etched on a two-layered dielectric substrate with dimensions 30 mm × 30 mm. On the front layer is put the 2.4 GHz dipole, which is perpendicular to the 5 GHz dipole located on the bottom layer. Though the two dipoles are stacked up with a distance of 0.8 mm only, port isolation can still be below –15 dB. The proposed dual-dipole-antenna system is a promising candidate for the antenna solution that enables simultaneous dual-radio operation.
A Bent, Shorted, Planar Monopole Antenna for 2.4 GHz WLAN ApplicationsSaou-Wen Su
A simple, bent monopole antenna well useful for WLAN applications in the 2.4 GHz band is presented. The monopole antenna has a rectangular radiating plate in general and is short-circuited to a small antenna ground and an assembly plate. The assembly plate is not only used as a supporting plate for antenna installation but also regarded as antenna ground. With a low profile of the monopole and use of the coaxial-line feed, the antenna has much flexibility in the placement inside a wireless device. Good radiation characteristics have been observed too.
Very-Low-Profile Monopole Antennas for Concurrent 2.4- and 5-GHz WLAN Access-...Saou-Wen Su
A very-low-profile, six-antenna MIMO system aimed at operating in the concurrent 2.4 and 5 GHz bands for WLAN access-point applications is proposed. The MIMO system consists mainly of an antenna ground plane and six short-circuited monopole antennas, among which the three antennas are designated for 2.4 and 5 GHz operation respectively. The antennas are set in a sequential, rotating arrangement on the ground plane, and the 2.4 and 5 GHz antennas are facing each other one by one. The results show that well port isolation can be obtained together with good radiation characteristics. With a low profile of 6 mm in height, the proposed design can easily fit into wireless access points or routers and allow the 2.4- and 5-GHz band signals to be simultaneously received and transmitted with no need of external diplexer.
Internal Wideband Monopole Antenna for MIMO Access-Point Applications in the ...Saou-Wen Su
A three-antenna MIMO system capable of generating a wide operating bandwidth of 2400-5850 MHz for access-point applications is introduced. The proposed design is based on a bent metal-plate monopole antenna with a compact size of 20 × 20 × 14 mm3. The three antennas are equally spaced along the perimeter of a circular ground and all generate a wide bandwidth of larger than 4 GHz. With the antenna short-circuiting facing the center of the ground, not only the overall antenna size is reduced but also good isolation of less than -20 dB can easily be obtained. Calculated envelope correlation is also less than 0.002 across the operating band. The design prototype of the antenna is discussed in detail in the paper.
2008 IEEE AP-S-Internal Wideband Monopole Antenna For MIMO Access-Point Appli...Saou-Wen Su
A three-antenna MIMO system capable of generating a wide operating bandwidth of 2400-5850 MHz for access-point applications is introduced. The proposed design is based on a bent metal-plate monopole antenna with a compact size of 20 × 20 × 14 mm3. The three antennas are equally spaced along the perimeter of a circular ground and all generate a wide bandwidth of larger than 4 GHz. With the antenna short-circuiting facing the center of the ground, not only the overall antenna size is reduced but also good isolation of less than -20 dB can easily be obtained. Calculated envelope correlation is also less than 0.002 across the operating band.
Design of a Dual-Band Microstrip Patch Antenna for GPS,WiMAX and WLAN.IOSR Journals
The A multi band microstrip patch antenna has been designed for GPS,WiMAX and WLAN
applications. The proposed antenna is designed by using substrate of RT duroid having permittivity of about 2.2
and loss tangent of 1.The substrate is having thickness of 6mm at which a trapezoidal patch antenna with V slot
has been introduced in this paper. The designing results like S11 parameter return loss,VSWR and field pattern
is plotted successfully. The obtained result is having a two band resonance with S11 less then -10dB and VSWR
less than 2.
So a dual band trapezoidal microstrip patch antenna has been designed and all results are plotted.Simmulating
software used is IE3D.
2009 IEEE AP-S-Compact Coaxial-Line-Fed Printed Monopole Antenna for Lower-Ba...Saou-Wen Su
A compact, printed, ultrawideband (UWB) monopole antenna suitable to be as an internal antenna attractive for future UWB applications is demonstrated. The proposed antenna is of a small form factor with the dimensions 6 mm × 33 mm and can easily be fed by 50-ohms mini-cable line. The antenna mainly comprises a monopole antenna, a feeding strip and a ground plane, all printed on a small FR4 substrate. The monopole antenna is printed on both layers of the substrate with an end portion on the back for control of the first/lower resonant mode of the antenna. The feeding strip in between the monopole antenna and the ground plane is further offset to achieve better impedance matching and proper upper-edge operating frequency. With the proposed antenna structure, which provides an operating bandwidth of larger than 2.7 GHz, the impedance bandwidth by 10-dB return loss can easily cover the 3.1–4.85 GHz band, the lower band of the UWB operation.
A Review of Multi Resonant Slotted Micro Strip Patch Antenna (MPA) for IMT, W...IJEEE
In this paper, a stacked multi resonant slotted micro strip patch antenna (MPA) has been proposed which is suitable to be used for GSM, WLAN standard and WiMAX applications. The antenna has been designed using substrate of FR4 material. In the designed stacked antenna, substrates having different thickness has been used. The bottom stack of designed antenna has a radiating patch of circular shape and the patch on the upper stack has rectangular shape and is flexible in nature. The antenna has a feed line which is connected to circular patch to feed power to the antenna. The feed line has to be of suitable width to match the antenna impedance with port impedance of 50 ohms. The designed antenna has a defected ground structure in order to improve the antenna performance. The antenna performance has been measured in terms of antenna parameters such as impedance bandwidth (GHz), Return loss (dB), antenna impedance (ohms), VSWR and Directivity (dBi). The designed antenna results have been simulated in CST Microwave Studio 2010. The practically designed antenna has been tested successfully by using Network analyzer E5071C. It has been observed that the practical results closely match with theoretical results.
Design of Reconfigurable Microstrip Patch Antenna for WLAN ApplicationEditor IJMTER
In this paper we propose a rectangular microstrip patch antenna with inset fed which can
operate at 2.4 GHz (IEEE 802.11b) & 5.8 GHz (IEEE 802.11a) WLAN applications. Various slot is
cut into the antenna structure which changes the surface current path resulting in dual resonant
frequency. Further by embedding any switch into a slot, reconfiguration can be achieved i.e. the
antenna can only be used in unlicensed 2.4 GHz band. The achieved directivity is greater than 5db and
the bandwidth obtained is much greater than the required bandwidth. The proposed antenna is
simulated using High Frequency Structure Simulator.
Compact Vertical Patch Antenna for Dual-Band WLAN OperationSaou-Wen Su
A new compact patch antenna, which is arranged perpendicular to a circular ground plane, for WLAN operation is presented. The antenna consists mainly of one driven patch and one shorted parasitic patch, which both wind along two concentric circles. A constructed prototype covering the 2.4 and 5 GHz WLAN bands is demonstrated. Good broadside radiation characteristics are obtained across the operating bands. Details of the proposed patch antenna and experimental results are presented and discussed.
Characteristic Comparison of U-Shaped Monopole and Complete Monopole AntennaIOSR Journals
A monopole antenna is a type of radio antenna formed by replacing one half of a dipole antenna with
a ground plane at right-angles to the remaining half. Monopoles may be used from a few hundred KHz through
several GHz in frequency and are commonly one-quarter of a wave length long, but may be shorter or longer.
Monopole antennas exhibit high gain and improved efficiency in a surprisingly small package. Monopole
antenna can be designed to exhibit wideband capabilities. The different available monopole antennas are dual
band printed monopole antenna, cross-slot monopole antenna, U-shaped monopole antenna, triangular shaped
monopole antenna and a wideband monopole antenna. This paper deals with the comparison obtained from the
results such as return loss, VSWR, current distribution, and the radiation pattern of simple U-shaped and
complete monopole antenna
Matching a Bluetooth Headset Antenna on a Small System Ground by Using a Cond...Saou-Wen Su
A simple yet effective method for matching a compact planar inverted- F antenna (PIFA) on a small system circuit board for Bluetooth-headset applications is presented. The antenna is perpendicular to and extends along the top and right sides of the system ground, making it possible for the antenna to occupy almost no limited board space. Results have shown that by introducing a thin conductive wire soldered to the bottom corner of the system ground, good input matching over the 2400-2484 MHz band can easily be achieved for the PIFA mounted on a small ground of length less than a quarter wavelength at 2440 MHz. Radiation measurements of the proposed design in a real headset attached to a standard head phantom are also taken.
A Probe-Fed Patch Antenna with a Step-Shaped Ground Plane for 2.4 GHz Access ...Saou-Wen Su
This Letter demonstrates a new design of a probe-fed patch antenna with a modified antenna ground, and a constructed prototype ideal for applications in a 2.4-GHz WLAN access point is presented. The antenna has a thick air substrate for broadband operation and is fed by an inclined probe pin at the edge of the patch bent portion. The antenna ground comprises different portions and is in the shape of a step. With the proposed probe feed and ground configuration, good impedance bandwidth with VSWR below 1.5 over the 2.4 GHz WLAN band can be obtained. In addition, good broadside radiation characteristics have also been observed.
Concurrent 2.4/5-GHz Multi-Loop MIMO Antennas with Wide 3-dB Beamwidth Radiat...Saou-Wen Su
A high-gain, wide-beamwidth, six-loop-antenna MIMO system suited for wireless access points in the concurrent WLAN 2.4 and 5 GHz bands is presented. The antenna system mainly comprises an antenna ground plane and single-band loop antennas, among which the three antennas are designated for 2.4 and 5 GHz operation respectively. The antennas are set in a sequential, rotating arrangement on the ground plane with an equal inclination angle of 60° to form a symmetrical structure, and the 2.4 and 5 GHz loops are facing each other one by one. The experimental results show that good port isolation can be obtained between antenna ports. High-gain, directional radiation patterns with wide 3-dB beamwidth in elevation planes are also observed. Details of a design prototype are described and discussed in the paper.
Realization of Dual-Dipole-Antenna System for Concurrent Dual-Radio Operation...Saou-Wen Su
The study of the mutual coupling between the two simple strip dipole antennas is first carried out and investigated. The results show that the coupling or the antenna port isolation is almost separation distance independent when the two dipole antennas are arranged to be of orthogonal polarization. Following this characteristic, a novel dual-dipole-antenna system aimed for concurrent 2.4 and 5 GHz band operation and at the same time, to achieve very compact integration of two individual antennas with separate feeds is proposed. The two dipole antennas are etched on a two-layered dielectric substrate with dimensions 30 mm × 30 mm. On the front layer is put the 2.4 GHz dipole, which is perpendicular to the 5 GHz dipole located on the bottom layer. Though the two dipoles are stacked up with a distance of 0.8 mm only, port isolation can still be below –15 dB. The proposed dual-dipole-antenna system is a promising candidate for the antenna solution that enables simultaneous dual-radio operation.
A Bent, Shorted, Planar Monopole Antenna for 2.4 GHz WLAN ApplicationsSaou-Wen Su
A simple, bent monopole antenna well useful for WLAN applications in the 2.4 GHz band is presented. The monopole antenna has a rectangular radiating plate in general and is short-circuited to a small antenna ground and an assembly plate. The assembly plate is not only used as a supporting plate for antenna installation but also regarded as antenna ground. With a low profile of the monopole and use of the coaxial-line feed, the antenna has much flexibility in the placement inside a wireless device. Good radiation characteristics have been observed too.
Very-Low-Profile Monopole Antennas for Concurrent 2.4- and 5-GHz WLAN Access-...Saou-Wen Su
A very-low-profile, six-antenna MIMO system aimed at operating in the concurrent 2.4 and 5 GHz bands for WLAN access-point applications is proposed. The MIMO system consists mainly of an antenna ground plane and six short-circuited monopole antennas, among which the three antennas are designated for 2.4 and 5 GHz operation respectively. The antennas are set in a sequential, rotating arrangement on the ground plane, and the 2.4 and 5 GHz antennas are facing each other one by one. The results show that well port isolation can be obtained together with good radiation characteristics. With a low profile of 6 mm in height, the proposed design can easily fit into wireless access points or routers and allow the 2.4- and 5-GHz band signals to be simultaneously received and transmitted with no need of external diplexer.
Internal Wideband Monopole Antenna for MIMO Access-Point Applications in the ...Saou-Wen Su
A three-antenna MIMO system capable of generating a wide operating bandwidth of 2400-5850 MHz for access-point applications is introduced. The proposed design is based on a bent metal-plate monopole antenna with a compact size of 20 × 20 × 14 mm3. The three antennas are equally spaced along the perimeter of a circular ground and all generate a wide bandwidth of larger than 4 GHz. With the antenna short-circuiting facing the center of the ground, not only the overall antenna size is reduced but also good isolation of less than -20 dB can easily be obtained. Calculated envelope correlation is also less than 0.002 across the operating band. The design prototype of the antenna is discussed in detail in the paper.
2008 IEEE AP-S-Internal Wideband Monopole Antenna For MIMO Access-Point Appli...Saou-Wen Su
A three-antenna MIMO system capable of generating a wide operating bandwidth of 2400-5850 MHz for access-point applications is introduced. The proposed design is based on a bent metal-plate monopole antenna with a compact size of 20 × 20 × 14 mm3. The three antennas are equally spaced along the perimeter of a circular ground and all generate a wide bandwidth of larger than 4 GHz. With the antenna short-circuiting facing the center of the ground, not only the overall antenna size is reduced but also good isolation of less than -20 dB can easily be obtained. Calculated envelope correlation is also less than 0.002 across the operating band.
Design of a Dual-Band Microstrip Patch Antenna for GPS,WiMAX and WLAN.IOSR Journals
The A multi band microstrip patch antenna has been designed for GPS,WiMAX and WLAN
applications. The proposed antenna is designed by using substrate of RT duroid having permittivity of about 2.2
and loss tangent of 1.The substrate is having thickness of 6mm at which a trapezoidal patch antenna with V slot
has been introduced in this paper. The designing results like S11 parameter return loss,VSWR and field pattern
is plotted successfully. The obtained result is having a two band resonance with S11 less then -10dB and VSWR
less than 2.
So a dual band trapezoidal microstrip patch antenna has been designed and all results are plotted.Simmulating
software used is IE3D.
2009 IEEE AP-S-Compact Coaxial-Line-Fed Printed Monopole Antenna for Lower-Ba...Saou-Wen Su
A compact, printed, ultrawideband (UWB) monopole antenna suitable to be as an internal antenna attractive for future UWB applications is demonstrated. The proposed antenna is of a small form factor with the dimensions 6 mm × 33 mm and can easily be fed by 50-ohms mini-cable line. The antenna mainly comprises a monopole antenna, a feeding strip and a ground plane, all printed on a small FR4 substrate. The monopole antenna is printed on both layers of the substrate with an end portion on the back for control of the first/lower resonant mode of the antenna. The feeding strip in between the monopole antenna and the ground plane is further offset to achieve better impedance matching and proper upper-edge operating frequency. With the proposed antenna structure, which provides an operating bandwidth of larger than 2.7 GHz, the impedance bandwidth by 10-dB return loss can easily cover the 3.1–4.85 GHz band, the lower band of the UWB operation.
A Review of Multi Resonant Slotted Micro Strip Patch Antenna (MPA) for IMT, W...IJEEE
In this paper, a stacked multi resonant slotted micro strip patch antenna (MPA) has been proposed which is suitable to be used for GSM, WLAN standard and WiMAX applications. The antenna has been designed using substrate of FR4 material. In the designed stacked antenna, substrates having different thickness has been used. The bottom stack of designed antenna has a radiating patch of circular shape and the patch on the upper stack has rectangular shape and is flexible in nature. The antenna has a feed line which is connected to circular patch to feed power to the antenna. The feed line has to be of suitable width to match the antenna impedance with port impedance of 50 ohms. The designed antenna has a defected ground structure in order to improve the antenna performance. The antenna performance has been measured in terms of antenna parameters such as impedance bandwidth (GHz), Return loss (dB), antenna impedance (ohms), VSWR and Directivity (dBi). The designed antenna results have been simulated in CST Microwave Studio 2010. The practically designed antenna has been tested successfully by using Network analyzer E5071C. It has been observed that the practical results closely match with theoretical results.
Design of Reconfigurable Microstrip Patch Antenna for WLAN ApplicationEditor IJMTER
In this paper we propose a rectangular microstrip patch antenna with inset fed which can
operate at 2.4 GHz (IEEE 802.11b) & 5.8 GHz (IEEE 802.11a) WLAN applications. Various slot is
cut into the antenna structure which changes the surface current path resulting in dual resonant
frequency. Further by embedding any switch into a slot, reconfiguration can be achieved i.e. the
antenna can only be used in unlicensed 2.4 GHz band. The achieved directivity is greater than 5db and
the bandwidth obtained is much greater than the required bandwidth. The proposed antenna is
simulated using High Frequency Structure Simulator.
Compact Vertical Patch Antenna for Dual-Band WLAN OperationSaou-Wen Su
A new compact patch antenna, which is arranged perpendicular to a circular ground plane, for WLAN operation is presented. The antenna consists mainly of one driven patch and one shorted parasitic patch, which both wind along two concentric circles. A constructed prototype covering the 2.4 and 5 GHz WLAN bands is demonstrated. Good broadside radiation characteristics are obtained across the operating bands. Details of the proposed patch antenna and experimental results are presented and discussed.
Characteristic Comparison of U-Shaped Monopole and Complete Monopole AntennaIOSR Journals
A monopole antenna is a type of radio antenna formed by replacing one half of a dipole antenna with
a ground plane at right-angles to the remaining half. Monopoles may be used from a few hundred KHz through
several GHz in frequency and are commonly one-quarter of a wave length long, but may be shorter or longer.
Monopole antennas exhibit high gain and improved efficiency in a surprisingly small package. Monopole
antenna can be designed to exhibit wideband capabilities. The different available monopole antennas are dual
band printed monopole antenna, cross-slot monopole antenna, U-shaped monopole antenna, triangular shaped
monopole antenna and a wideband monopole antenna. This paper deals with the comparison obtained from the
results such as return loss, VSWR, current distribution, and the radiation pattern of simple U-shaped and
complete monopole antenna
Matching a Bluetooth Headset Antenna on a Small System Ground by Using a Cond...Saou-Wen Su
A simple yet effective method for matching a compact planar inverted- F antenna (PIFA) on a small system circuit board for Bluetooth-headset applications is presented. The antenna is perpendicular to and extends along the top and right sides of the system ground, making it possible for the antenna to occupy almost no limited board space. Results have shown that by introducing a thin conductive wire soldered to the bottom corner of the system ground, good input matching over the 2400-2484 MHz band can easily be achieved for the PIFA mounted on a small ground of length less than a quarter wavelength at 2440 MHz. Radiation measurements of the proposed design in a real headset attached to a standard head phantom are also taken.
A Probe-Fed Patch Antenna with a Step-Shaped Ground Plane for 2.4 GHz Access ...Saou-Wen Su
This Letter demonstrates a new design of a probe-fed patch antenna with a modified antenna ground, and a constructed prototype ideal for applications in a 2.4-GHz WLAN access point is presented. The antenna has a thick air substrate for broadband operation and is fed by an inclined probe pin at the edge of the patch bent portion. The antenna ground comprises different portions and is in the shape of a step. With the proposed probe feed and ground configuration, good impedance bandwidth with VSWR below 1.5 over the 2.4 GHz WLAN band can be obtained. In addition, good broadside radiation characteristics have also been observed.
A Three-in-One Diversity Antenna System for 5 GHz WLAN ApplicationsSaou-Wen Su
A novel, three-in-one antenna system suitable for WLAN operation in the 5 GHz band is presented. The design is based upon incorporating one slot and two dipole antennas into a compact multi-antenna system that has comparable dimensions of a single mobile-unit antenna element. The three antennas are arranged parallel to each other with the two dipoles set on the right and left sides of the slot respectively. With this arrangement, not only can compact integration of three individual antennas be realized, pattern diversity and polarization diversity are also obtained. A design prototype has been constructed and tested. The results show that the coupling or the antenna port isolation is below –20 dB and good radiation characteristics have been observed.
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Developing an actual very high frequency antenna using genetic algorithmseSAT Journals
Abstract Antenna for the 88-108MHz Very high frequency (VHF) broadcast audio frequency-modulation (FM) band. The antenna is intended tofit in the flat area inside the head-band of an over ear hearing-protector headset. The space for the antenna is limited by an existing head-band design, where the unused internal area is the space studied in this thesis. A genetic algorithm is described for the multiple objective optimization of the antenna matching and radiation pattern optimization. The results of multiple genetic algorithm evaluations are described, and possible further improvements outlined. Progress is made on the development of the antenna. The antenna radiation pattern is evolved in desirable way, but a difficulty in solving the antenna matching problem is identified. Research for resolving the antenna matching problem is described in this paper Keywords: Antenna, Modulation, Genetic Algorithm, Frequency, Head-Band, Very High Frequency Broadcast.
The CARPET is designed using Flame Retardant (FR4) substrate with thickness of 1.6 and dielectric constant 4.6 is used for design and fabrication purpose.
The simulated results produce four frequency dips within 10GHZ range. WIMAX(2.5GHZ) , ISM band(5.8GHZ) , C-band Radar(6.2GHZ) and C-band Satellite(7.4GHZ).
Review: Dual Band Microstrip Antennas for Wireless ApplicationsIJAAS Team
In this manuscript, a review of dual band microstrip antennas for wireless communication is presented. This review manuscript discusses regarding the geometric structures, different methods of analysis for antenna characteristics, and different types of wireless applications.
Design and optimize microstrip patch antenna array using the active element p...journalBEEI
Microstrip patch antennas are widely used in modern day communication devices due to their light weight, low cost and ease of fabrication. In this paper, we have designed and fabricated two Microstrip Patch Antennas (slotted-ring and truncated-slotted ring) and array at 2.4 GHz for Wireless Local Area Network (WLAN) applications using Computer Simulation Technology, CST. The antenna design consists of rectangular radiating patch on Rogers RT5880 substrate and is excited by using coaxial probe feeding technique. The truncated-slotted ring has been designed on top of the radiating patch to improve bandwidth. The simulation and measurement results of the both antennas are in close agreement with each other. Due to the good agreement of simulation and measurement results of truncated-slotted ring antenna in comparison with slotted-ring antenna, it has been selected for antenna array design. The simulated and measured S11 of truncated-slotted ring antenna shows -21dB and -15.6 dB at 2.4 GHz respectively. Then, the antenna has been formed into 1x4 array in order to observe its beamforming capability. The proposed antenna array is suitable for 802.11b/g/n Wi-Fi standard which is proposed to be used for IoT.
Abc pso optimization technique for parameter optimization in circular log per...eSAT Journals
Abstract
It is applicable to note that, in the overall wireless communication mechanism, the role played by the antenna is beyond the realm of words. In fact, the deployment of the antenna the wireless network faces the grave challenges of the communication of the high speed signals. Of late, the Nano_antennas make their elegant presence in several spheres of the technology. However, it is highly essential, at present, to have an overall awareness for the purpose of a balanced design of nano_antennas with broadband feedbacks. These days, many a technique is doing its elegant rounds invested in examining the spectral features of the log periodic nano_antenna by the excitation method of reception and discharge. The field improvement of nano_ antenna can be harmonized by several geometric, constraints, including the outer radius, the tooth angle, and the ratio of the radial sizes of consecutive teeth, which furnish effective check on the spectral resonance position and the field renovation. Taking the challenges in to consideration, a novel hybrid ABC0-PSO optimization approach is launched in the document, which involves a gifted prospect for planning and adapting the LPNA. With the result, the adaption of the related constraints incredibly increases the effectiveness of the mechanism to envision it to an acceptable level. The design of the LPNA is made by adapting the constraints which is highly appropriate for the wireless communication which is assessed for field improvement and the Purcell factor of Conventional Log periodic Toothed Antenna and Log periodic Toothed Circular Nano Antenna.
Keywords: Circular Log Periodic Nano Antenna, Field Enhancement, Purcell Factor, Genetic Algorithm, Artificial Bee Colony.
Abc pso optimization technique for parameter optimization in circular log per...eSAT Journals
Abstract
It is applicable to note that, in the overall wireless communication mechanism, the role played by the antenna is beyond the realm of words. In fact, the deployment of the antenna the wireless network faces the grave challenges of the communication of the high speed signals. Of late, the Nano_antennas make their elegant presence in several spheres of the technology. However, it is highly essential, at present, to have an overall awareness for the purpose of a balanced design of nano_antennas with broadband feedbacks. These days, many a technique is doing its elegant rounds invested in examining the spectral features of the log periodic nano_antenna by the excitation method of reception and discharge. The field improvement of nano_ antenna can be harmonized by several geometric, constraints, including the outer radius, the tooth angle, and the ratio of the radial sizes of consecutive teeth, which furnish effective check on the spectral resonance position and the field renovation. Taking the challenges in to consideration, a novel hybrid ABC0-PSO optimization approach is launched in the document, which involves a gifted prospect for planning and adapting the LPNA. With the result, the adaption of the related constraints incredibly increases the effectiveness of the mechanism to envision it to an acceptable level. The design of the LPNA is made by adapting the constraints which is highly appropriate for the wireless communication which is assessed for field improvement and the Purcell factor of Conventional Log periodic Toothed Antenna and Log periodic Toothed Circular Nano Antenna.
Keywords: Circular Log Periodic Nano Antenna, Field Enhancement, Purcell Factor, Genetic Algorithm, Artificial Bee Colony.
Importance of Antennas for Wireless Communication Devicespaperpublications3
Abstract: The extensive demand for mobile communication and information exchange through wireless devices has lead to major achievements in antenna designing. The purpose of the paper is to give a frame of reference, understanding, and overview of antennas used in wireless communication devices. In this paper we will be discussing various antennas, their advantages and drawbacks. Also a brief framework of comparisons between various antennas is presented on the basis of various parameters. This paper also summarizes the benefits and use of PIFA for USB dongle to cover the Wi MAX bands.
Similar to Compact Paper-Clip-Shaped Wire Antenna for 2.4 and 5.2 GHz WLAN Operation (20)
2. Figure 2 Measured return loss for the design prototype. [Color figure
(a) can be viewed in the online issue, which is available at www.
interscience.wiley.com]
width (5 mm in this case) for the antenna, the distance is adjusted
by shifting both the feeding and the shorting points away from the
shorting portion. A near optimal value of 2 mm was selected.
Furthermore, by fine-tuning the length of the overlapped section
C–D [see Fig. 1(a)] in the longer radiating arm, well-matched
(b)
Figure 1 (a) Detailed geometry of the dual-band copper-wire antenna for
WLAN operation. (b) Photo of a working sample fed by 50- mini-coaxial
cable. [Color figure can be viewed in the online issue, which is available at
www.interscience.wiley.com]
antenna is made of a thin copper wire of about 65 mm in length
and of diameter 0.8 mm, and can be easily fabricated by bending
few times the wire into a paper-clip shape. The proposed antenna
consists mainly of a shorter radiating arm, a longer radiating arm,
(a)
and a shorting portion that links both the radiating arms. The
shorter radiating arm provides a resonant path for upper resonant
mode at 5.25 GHz. On the other hand, the longer radiating arm
dominates the antenna lower resonant mode for the 2.4-GHz band
operation and also, in part, functions as the antenna ground plane.
The overall size of the antenna in the form of a rectangle is with
the dimensions 5 mm 23.5 mm. A photo of a working sample of
the design prototype is presented in Figure 1(b). As seen in the
photo, a short 50- mini-coaxial cable with an I-PEX connector is
utilized to feed the wire antenna in the experiment. The inner
conductor of the coaxial cable is connected to the point A, the
feeding point, at the shorter radiating arm; the outer, braided
shielding is connected to the point B, the grounding point, at the
longer radiating arm.
For matching the input impedance over the 2.4 and 5.2 GHz
bands, the distance between the feeding and the shorting points (b)
were first determined. This distance has major effect on the achiev-
able bandwidth, similar to matching a monopole PIFA [8 –10], in Figure 3 Measured radiation patterns for the antenna studied in Figure
which the distance from the shorting strip to the antenna feeding 2: (a) at 2442 MHz; (b) at 5250 MHz. [Color figure can be viewed in the
point largely affects the impedance matching. With the predefined online issue, which is available at www.interscience.wiley.com]
DOI 10.1002/mop MICROWAVE AND OPTICAL TECHNOLOGY LETTERS / Vol. 50, No. 10, October 2008 2573