software simulate antenna for wireless LANs

hi, I'm looking for a software to simulate antenna using for Wireless LANs. I designed antenna with frequency 2.4Ghz and 5.0Ghz, and now I want to simulate
it with device of Wireless LANs " I want check it when it use in virtual systems "
thanks

What type of antenna is it? If its a printed antenna, any Planar EM simulator would be sufficient. My preferred one is Axiem. It is integrated with the circuit tool too, so simulating it with other WLAN components should be very easy.