how to simulate nonuniform transmission lines like taper

I am learning hfss,unfortunately,there is no example about nonuniform trasmission lines like taper or other types simulation.Who can give me some advice?
Is there any other software used to calculate nonuniform trasmission lines?

Hi
since Hfss is a 3d EM simulation structure, it's very easy that you simulate any shaped transmision line

Hi,ali110
yes,i can draw any shaped transmission lines i want,is it the same as uniform transmission line while defining ports,such as terminals, reference impedance?
Is there any details i should pay attention to while simulating nonuniform transmission lines?

Hi babyang
you can search for TEM horn antenna simulation in HFSS, because it's a nonunifrom transmission line