i have designed a rectangular patch antenna with circular polarization,,,,but i exactly dont know to measure axial ratio,,,can u please help me in fingding out axial ratio vs frequency graph,,,
after designing for circular polarization ,if we dnt get axial ratio less hen 3bd,,,is the design wrong??
I recommend you can use a commercial software such as CST or HFSS or ADS. all of them calculate the axial ratio easily and you don not need to do anything.