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E AND U SHAPE MICROSTRIP PATCH ANTENNA FOR

BIOMEDICAL APPLICATIONS ON HFSS

BY: RAMIT KIRTI SARAN AMIT KIRTI SARAN B-TECH(ECE), 3rd YEAR

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CONTENTS Introduction Microstrip patch antenna Feeding techniques and Design equations HFSS software tool and HFSS module E and U shape of Microstrip patch antenna Ansoft HFSS project flow Results Applications, advantages and future scope Conclusion

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INTRODUCTION What is an Antenna ? How EM Waves generate Basic Antenna Parameters

GainDirectivityRadiation Pattern

Tool: HFSS

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Fig.1: radiating Antenna[4]

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MICROSTRIP PATCH ANTENNA Microstrip patch antenna consists of a conducting patch and

ground plane between them is a dielectric medium called the substrate

The dimensions of a patch are smaller as compared to the substrate and ground

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Fig.2: Microstrip Patch[2]

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M i c r o s t r i p l i n e f e e dC o a x i a l f e e dA p e r t u r e c o u p l e d f e e dP r o x i m i t y c o u p l e d f e e d

FEEDING TECHNIQUES

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Fig.3: Types of Feeding Techniques[5]

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DESIGN EQUATIONS Step 1: Calculation of the Width (W): The width of the Microstrip patch antenna is given as:

Step 2: Calculation of Effective dielectric constant (εreff):

The effective dielectric constant is given by:

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DESIGN EQUATIONS

Step 3: Calculation of the Effective length ( Leff): The effective length is given as:

Step 4: Calculation of the length extension (L): The length extension is given as:

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DESIGN EQUATIONS

Step 5: Calculation of actual length of patch (L): The actual length is obtained by:

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HFSS SOFTWARE TOOLHFSS is a high-performance full-wave electromagnetic(EM) field simulator for arbitrary 3D volumetric passive device modeling that takes advantage of the familiar Microsoft Windows graphical user interface

High Frequency Structure Simulator It was developed by Prof. Zontal Cendes and his student at

Mellon Univ. in 1989 HFSS is commercial elements It is a method solver for electromagnetics

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HFSS MODULE

10Fig.4: HFSS modeler

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E AND U SHAPE OFMICROSTRIP PATCH ANTENNA

11Fig.5: Design of patch of antenna

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COAXIAL FEED TECHNIQUE

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Fig.6: SMA connector feed technique

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Configuration

Drawing

Boundary

Source Excitation

Solution Setup

Simulation

AnalyzeDataPlot

ANSOFT HFSS PROJECT FLOW

13Fig.7: Stages of designing antenna

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RETURN LOSS

14Fig.8: return loss

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VSWR PLOT

15Fig.9: Voltage standing wave ratio plot

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3D POLAR PLOT

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Fig.10: 3D Radiation plot and Gain

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RADIATION PATTERN

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Fig.11: 2D plot of Radiation and Gain

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APPLICATIONS Used in cellular phones, GPS systems etc. Compatible in wireless communications. The expansive transfer speed which is required in different

applications biomedical application (treatment of disease, tumour, and

so on.) Air ship, Rocket applications, and so forth

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ADVANTAGES OF MICROSTRIP ANTENNAS

Low cost Light weight and small in dimensions Mechanically robust when mounted on rigid surfaces Easy to fabricate Easy to feed (coaxial cable, Microstrip line, etc.)

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CONCLUSIONAn antenna simulation is done on High Frequency Structure Simulator HFSS. The design procedure begins with determining the length, width, height of patch plane by formulae. The obtained result of this antenna is peak gain of 9.37db, peak directivity is 10.024db and antenna efficiency is 93%, the minimum value of VSWR for this antenna is 0.0210 at 6.0175 GHz resonant frequency.

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FUTURE SCOPE

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REFERENCES[1] Amit kirti, Ramit kirti, Geeta” Design and Simulation

of E and U Shape Microstrip Patch Antenna for biomedical Applications” International Journal of Innovative research in Computer and Communication Engineering(IJIRCCE) ISSN: 2320-9801, Volume-3, Issue-10, November 2015

[2] C.A. Balanis, Antenna Theory, 2nd ed. New York: John Wiley & Sons, Inc., 1997.

[3] J.D. Kraus, ‘Antennas’, 1988, McGraw-Hill[4] www.myerseng.com[5] www.antenna-theory.com

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