Rectangularmicrostrippatchantenna
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This document describes the design and analysis of a rectangular microstrip patch antenna. It discusses the fundamental parameters of antennas, defines a microstrip patch antenna and its properties. It then details the design specifications for the rectangular patch, including its 3D modeling in HFSS software. The results of simulating the patch antenna in HFSS are presented, including S-parameters, radiation patterns and far field reports. Advantages and disadvantages of microstrip patch antennas are listed, along with their applications. The conclusion discusses achieving better return loss, gain and efficiency for the designed patch antenna.
Rectangularmicrostrippatchantenna
- 1. RECTANGULAR MICROSTRIP PATCH ANTENNA ABHIMANYU KUMAR GAUTAM ABHINAV KUMAR ANKIT GUPTA BRAJESH KUMAR GAUTAM KUMAR IKBAL AHMED LASKER
- 2. CONTENTS • Introduction • Fundamental parameters of antennas • Rectangular microstrip patch antenna • HFSS • Design specification of rectangular patch antenna • Analysis of patch antenna • Results of patch antenna • Advantage & disadvantage • Application • Conclusion • References
- 3. Introduction Antenna is defined as “a usually metallic device (as a rod or wire) for radiating or receiving radio waves.” But as for IEEE standard definitions of terms for antenna or aerial as “a mean for radiating or receiving radio waves.” Regardless of antenna type, all involve the same basic principle that radiation is produced by accelerated (or de-accelerated) charges.
- 4. Types of antennas . Wire antenna . Aperture antenna . Microstrip antenna . Array antenna . Reflector antenna . Lens antenna
- 5. Fundamental parameters of antennas . Radiation pattern .Isotropic,directional,and omnidirectional pattern
- 6. . Field regions > reactive near field region > radiating near field region > far field region . Radiation intensity . Directivity . Gain . Bandwidth . S-parameter . Z-parameter . VSWR
- 7. Rectangular microstrip patch antenna >In general Micro strip antennas are also known as “ PRINTED ANTENNAS ”. >These are mostly used at microwave frequencies >Because the size of the antenna is directly tied to the half wavelength at the resonant frequency. >Micro strip patch antenna or patch antenna is a narrowband wide-beam antenna. >The patch usually fed along the centerline to symmetry and thus minimize excitation of undesirable modes.
- 8. Micro strip antennas are easy to fabricate and comfortable on curved surface . The directivity is fairly insensitive to the substrate thickness. Micro strip patch antennas patches are in variety of shapes ,such as rectangular , square, triangular and circulator
- 9. . Fringing effect . Effective length, Resonant frequency and effective width
- 10. HFSS . HFSS stands for high frequency structure simulator . ANSYS HFSS software is the industry standard for simulating 3-D full wave electromagnetic fields Modes of operation . HFSS 3D model . Electrical CAD interface . HFSS 3D layout
- 11. ANSOFT HFSS • Solution Type Driven Model Driven Terminal Eignemode • Parametric model Generation 3D modelling Overview of Draw (Snap,moving) Material View of Model Boundary Condition Assign Port • Analysis Setup Adapt Frequency Convergence criteria Initial Mesh options Adaptive options Low order Basis Function
- 12. • Results • Solve loop
- 13. Design specification of rectangular patch antenna . 3D model > Ground > substrate > microstrip line(feed) > patch . Assigning boundary . Assigning excitation
- 14. Analysis of patch antenna . Analysis setup > solution freq > max number of passes > max Delta S per pass . Freq sweep > starting freq > attenuating freq > number of counting . Analyze
- 15. Results of patch antenna . Solution data > matrix data > convergence
- 16. > s-parameter > smith chart > 3D polar plot
- 17. . Far field reports > radiation pattern in 2D > 3D polar plot > rectangular plot
- 18. Advantage & disadvantage .Advantage Easy to fabricate on curved surfaces Easily integrated on MIC circuits Dual frequency and dual polarization can be easily made. Low cost , Less size in volume Mechanically robust on rigid surface Compatible with modular design .Disadvantage Narrow bandwidth Lower efficiency & gain(nearly 6db) Large ohmic losses in feed structure of arrays Excitation of surface waves Most microstrip antennas radiate into half-space Low power handling capability
- 19. Application :- Used in mobile satellite communication system. Used in aircraft , spacecraft & missiles Direct broad cast television(DBS). GPS system. Telemetry & telemedicine Radar application Remedies:- Low power and low gain can overcome by arrays configuration. Surface wave associated limitations such as poor efficiency, increased mutual coupling, reduced gain and radiation pattern can overcome. The band width can increase upto 60% by using some special techniques.
- 20. Conclusion Return loss, gain and efficiency are acceptable Bandwidth enhancement of 20dB is possible Our future work will be carried out using different feeding techniques with different software……… Simple, small size and high efficiency antenna can be designed
- 21. References C. A. Balanis, “Antenna Theory, Analysis and Design,” John Wiley & Sons, New York,1997. B.-K. Ang and B.-K. Chung “A wideband e-shaped microstrip patch antenna for 5–6ghz wireless communications”. Progress in Electromagnetics Research, PIER 75, 397–407, 2007 Mr.Anil K.K. leacturer of ECE Department,cochin university college of engineering, CUSAT www.google.com www.ansoft.com www.wikipedia.com www.electronicsforyou.com www.scribd.com
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