software dedicated for antennas and emc problems

Hello everybody,

I want to buy software for designing antenna and research EMC problem. Can you share with me your experience with EM simualtors in this subject. I am thinking about FEKO and HFSS but i really dont know which one to chose.

I will be grateful for any advices.

Best regards
Lukasz

Particularly for EMC applications TLM based solvers are good. Particularly CST Microstripes.