Circularly Polarized Patch Antenna: Axial Ratio coming out poor at larger angles
时间：03-25
整理：3721RD
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Hi,
Scenario
I have been trying to get a patch antenna designed with a circular polarization for axial ratio < 2dB between the +/- 70 degrees. The axial ratio is quite good upto +/-50 degrees. After that, it goes to 4dB axial ratio. The gain is not really a concern anymore, as that has been optimized.
The patch is a truncated probe fed patch antenna.
Query:
Was hoping to know if there are any suggestions/design inputs on how I could improve the axial ratio for angles upto +/-70 degrees.
Scenario
I have been trying to get a patch antenna designed with a circular polarization for axial ratio < 2dB between the +/- 70 degrees. The axial ratio is quite good upto +/-50 degrees. After that, it goes to 4dB axial ratio. The gain is not really a concern anymore, as that has been optimized.
The patch is a truncated probe fed patch antenna.
Query:
Was hoping to know if there are any suggestions/design inputs on how I could improve the axial ratio for angles upto +/-70 degrees.
As you approach the horizon, horizontal polarization gets shorted leaving only vertical. Even vertical gets curtailed if ground plane is finite.
EBGs/AMCs have been used to improve the axial ratio near the horizon, check out some of the literature on those.
Hi,
I have tried various methods. Can you direct me to a good resource for a AR<3dB for the Patch antenna?
Really finding too many dead ends. :/
Regards
Guruditya Sinha.
try to tuncate ur cornerss or add stubss...or u can try adding slot in ceneter opf patchh