This slide describes design and simulation about the micro strip patch antenna using HFSS software.study the return characteristics,gain(db)and radiation pattern
As the given frequency & substrate thickness, we calculate substrate length,width & patch length.you can refer theory in "ANTENNA THEORY" by C.A.Balanis
MicroStrip Antenna
Introduction .
Micro-Strip Antennas Types .
Micro-Strip Antennas Shapes .
Types of Substrates (Dielectric Media) .
Comparison of various types of flat profile printed antennas .
Advantages & DisAdvantages of MSAs .
Applications of MSAs .
Radiation patterns of MSAs .
How to Optimizing the Substrate Properties for Increased Bandwidth ?
Comparing the different feed techniques .
An Antenna is a transducer, which converts electrical power into electromagnetic waves and vice versa.
An Antenna can be used either as a transmitting antenna or a receiving antenna.
A transmitting antenna is one, which converts electrical signals into electromagnetic waves and radiates them.
A receiving antenna is one, which converts electromagnetic waves from the received beam into electrical signals.
In two-way communication, the same antenna can be used for both transmission and reception.
Basic Parameters
Frequency
Wavelength
Impedance matching
VSWR & reflected power
Bandwidth
Percentage bandwidth
Radiation intensity.
HFSS MICROSTRIP PATCH ANTENNA- ANALYSIS AND DESIGNShivashu Awasthi
ANALYSIS AND DESIGN OF MICROSTRIP SQUARE PATCH ANTENNA USING HFSS SIMULATION TOOL.
Its the Final Year Presentation at 75% of its full flow.
Hopefully It should Help..do leave your reviews and suggestions / queries.
Thanks.
This slide describes design and simulation about the micro strip patch antenna using HFSS software.study the return characteristics,gain(db)and radiation pattern
As the given frequency & substrate thickness, we calculate substrate length,width & patch length.you can refer theory in "ANTENNA THEORY" by C.A.Balanis
MicroStrip Antenna
Introduction .
Micro-Strip Antennas Types .
Micro-Strip Antennas Shapes .
Types of Substrates (Dielectric Media) .
Comparison of various types of flat profile printed antennas .
Advantages & DisAdvantages of MSAs .
Applications of MSAs .
Radiation patterns of MSAs .
How to Optimizing the Substrate Properties for Increased Bandwidth ?
Comparing the different feed techniques .
An Antenna is a transducer, which converts electrical power into electromagnetic waves and vice versa.
An Antenna can be used either as a transmitting antenna or a receiving antenna.
A transmitting antenna is one, which converts electrical signals into electromagnetic waves and radiates them.
A receiving antenna is one, which converts electromagnetic waves from the received beam into electrical signals.
In two-way communication, the same antenna can be used for both transmission and reception.
Basic Parameters
Frequency
Wavelength
Impedance matching
VSWR & reflected power
Bandwidth
Percentage bandwidth
Radiation intensity.
HFSS MICROSTRIP PATCH ANTENNA- ANALYSIS AND DESIGNShivashu Awasthi
ANALYSIS AND DESIGN OF MICROSTRIP SQUARE PATCH ANTENNA USING HFSS SIMULATION TOOL.
Its the Final Year Presentation at 75% of its full flow.
Hopefully It should Help..do leave your reviews and suggestions / queries.
Thanks.
By completing this presentation will be have a clear idea about Antenna's working principles, Antenna's Types & Antenna's Parameters. At the end to this document you'll have a brief idea about Antenna's Tilt vs Distance Calculation & Cluster wise optimum Antenna Selection procedure. Impact of antenna PIM & VSWR have been described elaborately in this document as well.
Microstrip patch antenna using Ku and K bandNahida Ali
In this presentation, results are yet to be analysed. But I think it might give the idea to electronics engineering students how to prepare their project ppt.
Modified T&U Shape Triangular Microstrip Patch Antenna Array for Communication.IJSRD
Modern communication system requires high gain, large bandwidth and less size antennas which shows excellent performance over a wide range of frequency spectrum. Proposed system uses FR4 as a dielectric substrate(€r=4.4).Proposed Triangular Miscrostrip Patch antenna is designed with additional T & U shape ,simulated by using high frequency simulation software HFSS & finally tested with the help of vector network analyzer (VNA -N9923A) . Various antenna parameters like Return Loss, Gain and VSWR etc. are calculated using HFSS. The antenna has been designed to operate on the range of 5.5GHz. This paper report the simulation result using equilateral triangular patch antenna with Microstrip line feed.
By completing this presentation will be have a clear idea about Antenna's working principles, Antenna's Types & Antenna's Parameters. At the end to this document you'll have a brief idea about Antenna's Tilt vs Distance Calculation & Cluster wise optimum Antenna Selection procedure. Impact of antenna PIM & VSWR have been described elaborately in this document as well.
Microstrip patch antenna using Ku and K bandNahida Ali
In this presentation, results are yet to be analysed. But I think it might give the idea to electronics engineering students how to prepare their project ppt.
Modified T&U Shape Triangular Microstrip Patch Antenna Array for Communication.IJSRD
Modern communication system requires high gain, large bandwidth and less size antennas which shows excellent performance over a wide range of frequency spectrum. Proposed system uses FR4 as a dielectric substrate(€r=4.4).Proposed Triangular Miscrostrip Patch antenna is designed with additional T & U shape ,simulated by using high frequency simulation software HFSS & finally tested with the help of vector network analyzer (VNA -N9923A) . Various antenna parameters like Return Loss, Gain and VSWR etc. are calculated using HFSS. The antenna has been designed to operate on the range of 5.5GHz. This paper report the simulation result using equilateral triangular patch antenna with Microstrip line feed.
Performance Analysis of Corporate Feed Rectangular Patch Element and Circular...Mohamed Hassouna
This paper present simple, slim, low cost and high gain circular patch and rectangular patch microstrip array antenna, with the details steps of design process, operate in X-band(8 GHz to 12 GHz) and it provides a mean to choose the effective one based on the performance analysis of both of these array antennas. The method of analysis, design and development of these array antennas are explained completely here and analyses are carried out for 4x2 arrays. The simulation has been performed by using commercially available antenna simulator, SONNET version V12.56, to compute the current distribution, return loss response and radiation pattern. The proposed antennas are designed by using Taconic TLY-5 dielectric substrate with permittivity, εr = 2.2 and height, h =1.588 mm. In all cases we get return losses in the range -4.96 dB to -25.21 dB at frequencies around 10 GHz. The gain of these antennas as simulated are found above 6 dB and side lobe label is maintained lower than main lobe. Operating frequency of these antennas is 10 GHz so these antennas are suitable for X-band application.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Designing of Rectangular Microstrip Patch Antenna for C-Band ApplicationIJMER
Microstrip patch antenna becoming very popular day by day because of its ease of analysis, fabrication, low cast, light weight easy to feed and their attractive radiation characteristics. In this paper we proposed the designed of rectangular microstrip patch antenna to operate at frequency range 5-6 GHz. The simulation is carried out using high frequency simulation structure (HFSS) program.
The antenna is based on the modified epoxy substrate with dielectric constant of approximate 4.4. After simulation rectangular microstrip antenna performs characteristics such as VSWR & return loss smith chart
A TRIPLE RECTANGULAR-SLOTTED MICROSTRIP PATCH ANTENNA FOR WLAN & WIMAX APPLIC...jantjournal
A triple rectangular slotted microstrip patch antenna is designed and investigated with and without slot using CST Software. By using the triple rectangular shaped slot the designed antenna operates at 2.4GHz (ranging from 2.3704 GHz (Gigahertz) to 2.4391 GHz at -10dB return loss) for WLAN (Wireless Local Area Network) and 3.6GHz (ranging from 3.5643 GHz to 3.6548 GHz at -10dB return loss) for WiMAX (Worldwide Interoperability for Microwave Access) applications having a maximum return loss -28.5dB and -25.4dB respectively. For the design of this antenna we have chosen FR-4 (lossy) as substrate having permittivity 4.3. The designed antenna has appreciable values of gain and directivity at both the frequencies. The proposed antenna works on the principle of excitation of the slots at the operating frequencies. The antenna was designed keeping in mind the two major Wireless standards i.e., WLAN and WiMAX bands of frequencies. The proposed triple-rectangular slots are unique in terms of its construction and have appreciable results at the operating frequencies.
A TRIPLE RECTANGULAR-SLOTTED MICROSTRIP PATCH ANTENNA FOR WLAN & WIMAX jantjournal
A triple rectangular slotted microstrip patch antenna is designed and investigated with and without slot using CST Software. By using the triple rectangular shaped slot the designed antenna operates at 2.4GHz (ranging from 2.3704 GHz (Gigahertz) to 2.4391 GHz at -10dB return loss) for WLAN (Wireless Local Area Network) and 3.6GHz (ranging from 3.5643 GHz to 3.6548 GHz at -10dB return loss) for WiMAX (Worldwide Interoperability for Microwave Access) applications having a maximum return loss -28.5dB and -25.4dB respectively. For the design of this antenna we have chosen FR-4 (lossy) as substrate having permittivity 4.3. The designed antenna has appreciable values of gain and directivity at both the frequencies. The proposed antenna works on the principle of excitation of the slots at the operating frequencies. The antenna was designed keeping in mind the two major Wireless standards i.e., WLAN and WiMAX bands of frequencies. The proposed triple-rectangular slots are unique in terms of its construction and have appreciable results at the operating frequencies.
A TRIPLE RECTANGULAR-SLOTTED MICROSTRIP PATCH ANTENNA FOR WLAN & WIMAX APPLIC...jantjournal
A triple rectangular slotted microstrip patch antenna is designed and investigated with and without slot using CST Software. By using the triple rectangular shaped slot the designed antenna operates at 2.4GHz (ranging from 2.3704 GHz (Gigahertz) to 2.4391 GHz at -10dB return loss) for WLAN (Wireless Local Area Network) and 3.6GHz (ranging from 3.5643 GHz to 3.6548 GHz at -10dB return loss) for WiMAX (Worldwide Interoperability for Microwave Access) applications having a maximum return loss -28.5dB and -25.4dB respectively. For the design of this antenna we have chosen FR-4 (lossy) as substrate having permittivity 4.3. The designed antenna has appreciable values of gain and directivity at both the frequencies. The proposed antenna works on the principle of excitation of the slots at the operating frequencies. The antenna was designed keeping in mind the two major Wireless standards i.e., WLAN and WiMAX bands of frequencies. The proposed triple-rectangular slots are unique in terms of its construction and have appreciable results at the operating frequencies.
A TRIPLE RECTANGULAR-SLOTTED MICROSTRIP PATCH ANTENNA FOR WLAN & WIMAX APPLIC...jantjournal
A triple rectangular slotted microstrip patch antenna is designed and investigated with and without slot
using CST Software. By using the triple rectangular shaped slot the designed antenna operates at 2.4GHz
(ranging from 2.3704 GHz (Gigahertz) to 2.4391 GHz at -10dB return loss) for WLAN (Wireless Local
Area Network) and 3.6GHz (ranging from 3.5643 GHz to 3.6548 GHz at -10dB return loss) for WiMAX
(Worldwide Interoperability for Microwave Access) applications having a maximum return loss -28.5dB
and -25.4dB respectively. For the design of this antenna we have chosen FR-4 (lossy) as substrate having
permittivity 4.3. The designed antenna has appreciable values of gain and directivity at both the
frequencies. The proposed antenna works on the principle of excitation of the slots at the operating
frequencies. The antenna was designed keeping in mind the two major Wireless standards i.e., WLAN and
WiMAX bands of frequencies. The proposed triple-rectangular slots are unique in terms of its construction
and have appreciable results at the operating frequencies.
A small H-shaped microstrip patch antenna (MPA) with enhanced bandwidth is presented. The H-shaped antenna is first studied and then fully simulated by HFSS. A dual U slot H patch configuration is proposed to increase the narrow bandwidth, radiation efficiency and directivity. A novel H-shaped patch antenna suitable for wireless and satellite communications is presented. This paper presents the dual U slot H-shaped microstrip patch antenna feed by transmission line. The decrease in the prices of handheld devices and services has made available on the move internet and web services facility to the customers, small antennas requirement are increasing. In this paper H-shaped patch antenna is designed using FR4 substrate. The proposed modified H shaped antenna is designed and simulated using HFSS and caters to various wireless applications such as WiMAX, Wi-Fi, UMTS and Digital Multimedia Broadcasting (DMB) e.g. T V, etc.
MINIATURISATION OF PATCH ANTENNA USING NOVEL FRACTAL GEOMETRYIAEME Publication
In the Field of low profile antennamicro strip patch antennas have attracted many researchers due to small sizeand low cost of fabrication. One of trending member of new designs is Fractalantenna. Fractal shapes are recursive/repetitive self-similar geometries, dueto this self-similarity they can provide high gain, multiband, widebandsolutions and design miniature antenna. Fractal shapes are widely used incomputing, analysis and design; recent trends suggest positive outcomes ofusing fractal shapes in electromagnetics and communication system. In thispaper Jerusalem cube fractal shape is introduced in probe fed conventionalpatch antenna for L1 band. A dual band antenna resonating at 1.41 GHz (L) and3.37 (S) GHz, band is constructed using said fractal shape.
A Simple Uhf Rfid Circularly-Polarized Reader Antenna DesignIJERA Editor
In this paper, the simple antenna is proposed for ultra high- frequency (UHF) radio frequency identification
(RFID) application. It is designed to achieve circular polarization with unidirectional beam. The antenna is
composed of the truncated radiation patch and ground plane. The simulation results show that the antenna
achieves the return loss of -31.92 dB, gain of 8 dBic, axial ratio (AR) of 1.8 dB and 3 dB AR beamwidth of 60
degree over the band width of 915-928 MHz.
A TRIPLE RECTANGULAR-SLOTTED MICROSTRIP PATCH ANTENNA FOR WLAN & WIMAX APPLIC...jantjournal
ABSTRACT
A triple rectangular slotted microstrip patch antenna is designed and investigated with and without slot using CST Software. By using the triple rectangular shaped slot the designed antenna operates at 2.4GHz (ranging from 2.3704 GHz (Gigahertz) to 2.4391 GHz at -10dB return loss) for WLAN (Wireless Local Area Network) and 3.6GHz (ranging from 3.5643 GHz to 3.6548 GHz at -10dB return loss) for WiMAX (Worldwide Interoperability for Microwave Access) applications having a maximum return loss -28.5dB and -25.4dB respectively. For the design of this antenna we have chosen FR-4 (lossy) as substrate having permittivity 4.3. The designed antenna has appreciable values of gain and directivity at both the frequencies. The proposed antenna works on the principle of excitation of the slots at the operating frequencies. The antenna was designed keeping in mind the two major Wireless standards i.e., WLAN and WiMAX bands of frequencies. The proposed triple-rectangular slots are unique in terms of its construction and have appreciable results at the operating frequencies.
KEYWORDS
MSPA, Rectangular slots, Return loss, WLAN, WiMAX
A TRIPLE RECTANGULAR-SLOTTED MICROSTRIP PATCH ANTENNA FOR WLAN & WIMAX APPLIC...jantjournal
A triple rectangular slotted microstrip patch antenna is designed and investigated with and without slot using CST Software. By using the triple rectangular shaped slot the designed antenna operates at 2.4GHz (ranging from 2.3704 GHz (Gigahertz) to 2.4391 GHz at -10dB return loss) for WLAN (Wireless Local Area Network) and 3.6GHz (ranging from 3.5643 GHz to 3.6548 GHz at -10dB return loss) for WiMAX (Worldwide Interoperability for Microwave Access) applications having a maximum return loss -28.5dB and -25.4dB respectively. For the design of this antenna we have chosen FR-4 (lossy) as substrate having permittivity 4.3. The designed antenna has appreciable values of gain and directivity at both the frequencies. The proposed antenna works on the principle of excitation of the slots at the operating frequencies. The antenna was designed keeping in mind the two major Wireless standards i.e., WLAN and WiMAX bands of frequencies. The proposed triple-rectangular slots are unique in terms of its construction
and have appreciable results at the operating frequencies.
Similar to Rectangular Microstrip Antenna Parameter Study with HFSS (20)
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Rectangular Microstrip Antenna Parameter Study with HFSS
1. RECTANGULAR FEED MICROSTRIPANTENNA
PARAMETER STUDY WITH HFSS SOFTWARE
School of Electrical Engineering
(Branch - ENTC)
Course: Antenna theory and design
Group-2 Batch-2 Block-1
Omkar Rane (TETB118) Exam Seat No: T187014
Chaitanya Deshpande (TETB119) Exam Seat No: T187001
Kaustubh Wankhade (TETB131) Exam Seat No: T187003
2. Rectangular Microstrip Feedline Antenna(MSA)
Microstrip antennas are low profile antennas and requires where size, weight, cost, performance and ease of installation and
aerodynamic profile are constraint such as in high-performance aircraft, spacecraft, satellite and missile applications.
Presently in some government and commercial applications such as in mobile radio and wireless communications that have
similar specifications, to meet these requirements, microstrip antennas can be used. These antennas are low profile,
conformable to planar and non-planar surfaces, simple and inexpensive to manufacture using modern printed circuit
technology . They are very versatile in terms of resonant frequency, polarization, pattern and impedance when a particular
patch shape and mode are selected. In addition by adding loads between the patch and the ground plane, such as pins and
varactor diodes, adaptive elements with variable resonant frequency, impedance polarization and pattern can be designed.
Major operational disadvantages of microstrip antennas are their low efficiency, low power, high Q, poor polarization purity,
poor scanning performance, spurious feed radiation and very narrow frequency bandwidth, which is typically only a fraction
of a percent or at most a few percent. In some government security systems narrow bandwidth are desirable; however, there
are methods such as increasing the height of the substrate that can be used to extend the efficiency (to as large as 90 % if
surface waves are not included) and bandwidth (up to 35%); however, as the height increases, surface waves are introduced
which usually are not desirable because they extract power from the total available for direct radiation (space waves). The
surface waves travel within the substrate and they are scattered at bends and surface discontinuities, such as the truncation of
the dielectric ground plane and degrade the antenna pattern and polarization characteristics. Surface waves can be eliminated,
while maintaining large bandwidths, by using cavities stacking as well as other methods of microstrip elements can also be
used to increase the bandwidth. In addition, microstrip antennas also exhibit large electromagnetic signatures at certain
frequencies outside the operating band are rather large physically at VHF and possibly UHF frequencies, and in large arrays
there is a tradeoff between bandwidth and scan volume. The next section describes the basic characteristics of antenna.
4. Design of MSA patch length and width
Step 1: Calculation of the
Width (W) -
Step 2: Calculation of the Effective Dielectric Constant. This
is based on the height, dielectric constant of the dielectric and
the calculated width of the patch antenna.
Step 3: Calculation of the Effective length
Step 4: Calculation of the length extension ΔL
Step 5: Calculation of actual length of the patch
Where the following parameters are used
f0 is the Resonance Frequency
W is the Width of the Patch
L is the Length of the Patch
h is the thickness
εr is the relative Permittivity of the dielectric substrate
c is the Speed of light: 3 x 108
6. Antenna dimensions and operating frequency
Ref: EM-TALK Patch and Line Calculator
Feedline Dimensions :
L=7.47245 mm
W=3.0589 mm
Z0 (impedance)=50 Ω
Dimension of Ground ,Substrate and Patch:
Overall dimension of antenna : 40 x 40 mm
Infinite Ground: 40x 40 mm
Substrate FR_4 Epoxy : height =1.6 mm and εr=4.4
Width of patch: 16.597 mm
Length of patch :12.438 mm
Operating Frequency of
MSA : f0 =5.5 GHz
9. Results (main antenna- f =5.5 GHz )
VSWR S11 Rectangular plot
2D polar plot 3D polar plot
10. Parametric study for Rectangular Microstrip Antenna
a) Varying L and W more than original value and observe results
b) Varying L and W less than original value and observe results
c) Changing height of substrate (h>1.6 mm)
d) Changing height of substrate (h<1.6 mm)
e) Changing Material of substrate (ℰr )
11. a) Varying L and W more than original value and observe
Calculations
Feedline Dimensions :
L=9.8794 mm
W=3.0589 mm
Z0 (impedance)=50 Ω
Dimension of Ground ,Substrate and Patch:
Overall dimension of antenna : 40 x 40 mm
Infinite Ground: 40x 40 mm
Substrate FR_4 Epoxy : height =1.6 mm and εr=4.4
Width of patch: 14 mm
Length of patch :17 mm
Operating Frequency of
MSA : f0 =4.16 GHz
15. Calculations
Feedline Dimensions :
L=6.737 mm
W=3.0589 mm
Z0 (impedance)=50 Ω
Dimension of Ground ,Substrate and Patch:
Overall dimension of antenna : 40 x 40 mm
Infinite Ground: 40x 40 mm
Substrate FR_4 Epoxy : height =1.6 mm and εr=4.4
Width of patch: 11.130 mm
Length of patch :14.965 mm
Operating Frequency of
MSA : f0 =6.1 GHz
b) Varying L and W less than original value and observe
23. e) Changing material of substrate
Previously the dielectric material was FR_4 Epoxy which is now Changed to RT_Duroid
ℰ r =4.4 for FR_4 Epoxy substrate material and ℰ r=2.2 for RT_Duroid
Radiation pattern
25. Applications of MSA
1) Mobile and satellite communication application:
Mobile communication requires small, low-cost, low profile
antennas. Microstrip patch antenna meets all requirements and
various types of microstrip antennas have been designed for use
in mobile communication systems. In case of satellite
communication circularly polarized radiation patterns are
required and can be realized using either square or circular
patch with one or two feed points.
26. 2) Global Positioning System applications:
Nowadays microstrip patch antennas with substrate having high permittivity
sintered material are used for global positioning system. These antennas are
circularly polarized, very compact and quite expensive due to its positioning. It
is expected that millions of GPS receivers will be used by the general
population for land vehicles, aircraft and maritime vessels to find there position
accurately Єr2 Єr1 Patch Antenna Transmission Line Ground plane with
aperture Patch Microstrip feed line Antenna dielectric Feed substrate .
27. 3) Radio Frequency Identification (RFID):
RFID uses in different areas like mobile communication,
logistics, manufacturing, transportation and health care [2].
RFID system generally uses frequencies between 30 Hz and 5.8
GHz depending on its applications. Basically RFID system is a
tag or transponder and a transceiver or reader. Worldwide
Interoperability for Microwave Access (WiMax): The IEEE
802.16 standard is known as WiMax. It can reach upto 30 mile
radius theoretically and data rate 70 Mbps. MPA generates three
resonant modes at 2.7, 3.3 and 5.3 GHz and can, therefore, be
used in WiMax compliant communication equipment.
28. 4) Radar Application:
Radar can be used for detecting moving targets such as people
and vehicles. It demands a low profile, light weight antenna
subsystem, the microstrip antennas are an ideal choice. The
fabrication technology based on photolithography enables the
bulk production of microstrip antenna with repeatable
performance at a lower cost in a lesser time frame as compared
to the conventional antennas. Rectenna Application: Rectenna is
a rectifying antenna, a special type of antenna that is used to
directly convert microwave energy into DC power. Rectenna is
a combination of four subsystems i.e. Antenna, ore rectification
filter, rectifier, post rectification filter. in rectenna application, it
is necessary to design antennas with very high directive
characteristics to meet the demands of long-distance links. Since
the aim is to use the rectenna to transfer DC power through
wireless links for a long distance, this can only be accomplished
by increasing the electrical size of the antenna.
Ref:
https://www.drdo.gov.in/drdo/pub/techf
ocus/aug05/antena.htm
29. 5) Telemedicine Application:
In telemedicine application antenna is operating at 2.45 GHz. Wearable
microstrip antenna is suitable for Wireless Body Area Network (WBAN).
The proposed antenna achieved a higher gain and front to back ratio
compared to the other antennas, in addition to the semi directional radiation
pattern which is preferred over the omni-directional pattern to overcome
unnecessary radiation to the user's body and satisfies the requirement for on-
body and off-body applications. A antenna having gain of 6.7 dB and a F/B
ratio of 11.7 dB and resonates at 2.45GHz is suitable for telemedicine
applications. Medicinal applications of patch: It is found that in the treatment
of malignant tumours the microwave energy is said to be the most effective
way of inducing hyperthermia. The design of the particular radiator which is
to be used for this purpose should posses light weight, easy in handling and
to be rugged. Only the patch radiator fulfils these requirements. The initial
designs for the Microstrip radiator for inducing hyperthermia was based on
the printed dipoles and annular rings which were designed on S-band. And
later on the design was based on the circular microstrip disk at L-band. There
is a simple operation that goes on with the instrument; two coupled
Microstrip lines are separated with a flexible separation which is used to
measure the temperature inside the human body. A flexible patch applicator
can be seen in the figure below which operates at 430 MHz
30. Conclusion
1) With increase in width, aperture area, (dielectric constant)εr and fringing fields increase, hence frequency
decreases and input impedance plot shifts towards lower impedance values. BW αWand Gain αW.
2) As height of substrate increases, fringing fields and probe inductance increase, frequency decreases and input
impedance plot shifts upward.
3) With decrease in εr, both Length and Width of patch Increase, which increases fringing fields and aperture area,
hence both Bandwidth and Gain increase.
4) With increase in εr , size of the antenna decreases for same resonance frequency. Hence, gain decreases and
HPBW increases.
5) Width of microstrip feedline plays important role in impedance matching.