How to have circular polarized antenna in aperture copuled feed?

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Raymond Rumpf

Here are some things for you...

http://www.ecs.umass.edu/ece/pozar/aperture.pdf

http://www.jpier.org/PIER/pier.php?paper=13101803

http://www.radioeng.cz/fulltexts/2010/10_01_111_116.pdf

Rekha Sarma

How can I check whether it is dual polarised in hfss?

Marcelo B. Perotoni

Hi Rekha

You need to look for the AR (Axial Ratio) parameter when visualizing the farfield result in the program. AR=0dB means perfect CP.

what should i add in rectangular patch so as to make it circular polarized?

Rekha

There are many ways - check on Balanis Book.

One way would be add another feed point to the patch, 90 degrees spatially rotated, with 90 degrees electrically delayed.

Take a look here

http://www.thefullwiki.org/Patch_antenna

Ali Foudazi

If you want aperture xoypling, you might be able to apply truncate technique by forcing current to rotate.