impedance matching with hfss

Hi
I want to design chebyshev impeedance matching in HFSS Software.i don't know how can i assign load impedance to my structure.do I must assigne this impedance to ports?!or another way?
thanks

You can't really "assign" an impedance to a structure... The geometry defines what the impedance is.

You can define the impedance of a lumped port, though. You draw a rectangle, and when you assign it as a lumped port, you can define a complex impedance.

Note that wave ports cannot be changed from 50 ohms