rectangular microstrip antenna

hi all,

here i need some help to identified the circularly polarized for rectangular micro strip antenna with dual feed. how can i show that my design is a circularly polarized? my antenna design is rectangular patch microstrip antenna with center frequency at 2.4GHz. i've done my design simulation by using HFSS. can any body help me up to show that my design is a circularly polarized from the simulation result and how to see the result ??

You need to cut small elements at angles of square patch to obtaine circular polarization.

Give you have simulated the patch. Look at the Axial Ratio which defines how CP the waves your antenna radiates.

At which Φ and θ we need to look AR.

you shoud excitate two modes (equiamplitude and in quadrature phase)by some method in rectangular microstrip antenna.on of this method is truncated corners and on of is added slit or stub to antenna.i propose that yoy read some paper in this mater