how to design circular polarization for circular patch???

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kristal

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what is the simple way to get circular polarization for circular patch.in using cst and coaxial probe feed method...im very clueless plezzz help me:sad:
 

See the below image: (Source: Wikipedia)

 
Singly Fed Circularly Polarized Patch:
Typical configurations for a singly fed CP microstrip antennas are shown in figure
below A single point feed patch capable of producing CP radiation is very desirable is
situations where it is difficult to accommodate dual-orthogonal feeds with a power divider
network
 

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HI
I want to simulate array using floquet port and master ,slave boundry with HFSS v.12.I need circular polarization,and I do not know ,how must do it.can anybody help me???????????
thanks a lot
 
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