How to simulate a patch fss using HFSS?

I am trying to simulate patch fss using HFSS. I dont know how to simualte.
can any one help me regarding this matter

I hope these guides will help you.

https://www.edaboard.com/viewtopic.php?p=192800#192800
https://www.edaboard.com/viewtopic.php?p=516417#516417

bye

Francesco

thank you for your reply,but I am looking for frequency selective surface(patch) simulations in hfss for oblique incidences of plane wave.

whatever you do, make sure you use discrete sweep rather than fast sweep