CEME-NUST
Multilayer Circular Patch Antenna at 10 GHz frequency
Wave Propagation & Antennas
(NS) Atif Ahmed (NS) Adnan Ashraf (NS) Muhammad Ali (PC) Atif Naveed (PC) Hafiz Kashif Hameed
28-Feb-2008
Multilayer Circular Patch Antenna at 10 GHz frequency
Contents
ABSTRACT...................................................................................................................................................... 3 INTRODUCTION ............................................................................................................................................. 4 DESIGN .......................................................................................................................................................... 5 RESULTS ........................................................................................................................................................ 6 Return Loss................................................................................................................................................ 6 VSWR......................................................................................................................................................... 7 3D Polar Plot ............................................................................................................................................. 7 Radiation Pattern at 90o............................................................................................................................ 8 Gain ........................................................................................................................................................... 9 Gain of Single Layer Circular Patch Antenna at 10 GHz frequency ........................................................... 9 SPECIFICATIONS .......................................................................................................................................... 10 RECOMMENDATIONS ................................................................................................................................. 11 CONCLUSION............................................................................................................................................... 12
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Multilayer Circular Patch Antenna at 10 GHz frequency
ABSTRACT
This report is about the project of designing a multilayer circular patch antenna at 10 GHz frequency. Introduction about the project follows the abstract. Design of this project is given. Results of this project come next. Project’s specifications are then given. Recommendations are also made. Conclusion is given at the end of report.
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Multilayer Circular Patch Antenna at 10 GHz frequency
INTRODUCTION
A patch antenna is a popular antenna type, which gains its name from the fact that it basically consists of a metal patch suspended over a ground plane. The assembly is usually contained in a plastic radome, which protects the structure from damage (as well as concealing its essential simplicity). Patch antennas are simple to fabricate and easy to modify and customize. They are closely related to microstrip antennas, which are just patch antennas constructed on a dielectric substrate, usually employing the same sort of lithographic patterning used to fabricate printed circuit boards. The simplest patch antenna uses a half-wavelength-long patch and a larger ground plane. (Large ground planes give better performance but of course make the antenna bigger. It isn’t uncommon for the ground plane to be only modestly larger than the active patch.) The current flow is along the direction of the feed wire, so the vector potential and thus the electric field follow the current, as shown by the arrow in the figure labeled E. A simple patch antenna of this type radiates a linearly polarized wave. The radiation can be regarded as being produced by the “radiating slots” at top and bottom, or equivalently as a result of the current flowing on the patch and the ground plane.
Figure
Patch Antenna
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Multilayer Circular Patch Antenna at 10 GHz frequency
DESIGN
Figure
Design
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Multilayer Circular Patch Antenna at 10 GHz frequency
RESULTS
Return Loss
Figure
Return Loss
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Multilayer Circular Patch Antenna at 10 GHz frequency
VSWR
Figure
VSWR
3D Polar Plot
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Multilayer Circular Patch Antenna at 10 GHz frequency Figure 3D Polar Plot
Radiation Pattern at 90o
Figure
Radiation Pattern at 90o
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Multilayer Circular Patch Antenna at 10 GHz frequency
Gain
Figure
Gain
Gain of Single Layer Circular Patch Antenna at 10 GHz frequency
Figure
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Gain of Single Layer Circular Patch Antenna at 10 GHz
Multilayer Circular Patch Antenna at 10 GHz frequency
SPECIFICATIONS
This project of multilayer circular patch antenna has a resonance frequency of 10 GHz and it has two layers.
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Multilayer Circular Patch Antenna at 10 GHz frequency
RECOMMENDATIONS
This project can significantly be improved, specially its gain, by adding more layers. However, it should be kept in mind that permittivity of the substrate should decrease with the number of substrate and its height should increase.
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Multilayer Circular Patch Antenna at 10 GHz frequency
CONCLUSION
This project is an exercise that gives an insight into the designing of different real world devices such as patch antennas by using HFSS software. This also provides us a good knowledge of patch antennas and HFSS software.
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