Help me with circular patch antenna design in HFSS

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HFSS_beginner

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Circular patch antenna

Dear Sir,
I am a Ph.D student at UPV University (Spain).I have been requested to design a circular path antenna with coaxial feed working with the second resonat mode. The antenna is intended for WIFI 5.7 GHz.
Could you please send me some guidances? I am a neophyte with HFSS, and I keep on fighting with HFSS environment, setting boundaries, excitations..., but to now I have to admit that I have failed to get the expected surface current on the patch.
 

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