FEM electromagnetic tutorial - mainly about HFSS. Patch antenna design.

I don't know how I came across this - literally just found it on my desktop, and no idea where it came from. But I must have downloaded it from somewhere. It's a tutorial for undergraduates about Computational Electromagnetics (CEM), but focuses on the FEM method, based on the PDE form of Maxwell's Equations. But 80% of it is a HFSS tutorial, which shows how to design a patch antenna using equations, then simulate it in HFSS and plot various results.

whats your problem? its calculate by formula and simulated them in HFSS

There was no problem - I just attached the file as I thought it might be useful to others. I've not actually gone through the tutorial, but the background material looks quite interesting.