hello,
i'm designing a patch antenna in hfss. in order to achieve circular polarization i'm planning to use a 90 degree hybrid coupler. Is it possible to create a 90 degree phase shift in orthogonal mode excitation in hfss without actually having to draw a coupler. thanks in advance.
I tried that. I used two lump ports positioned 90 degrees apart and sources changed to phase 0 and 90 respectively. however, i'm still not able to achieve an axial ratio vs frequency below 3 dB for resonating frequencies.