Can anyone help me?

I need to do a simulation which is to perform a simulation of antenna parameters
(such as directive gain, beamwidth, radiation patterns, bandwidth, etc.), and i choose the "Multiple-Frequency band antenna". Also i found a software (SuperNEC) to do the simulation, but this software can not simulate this kind of antenna. Can anybody tell me what can i do? Thanks.

Try to use....ensemble or hfss.....

cst or ie3d

XFDTD is very good software.Ofcourse you can write code by yourself.It is not so difficult.

I would suggest hfss as a very good s/w for antenna simulation...just as cwjcwjcwj has said.

Hi,

you can also use FEKO, follow the link below

http://www.feko.info/

If you work with wire antennas, I thinks NEC or its commercial
versions (they are many for example Mininec Broadcast Prof from EM Scientific),
is OK. The program is understandable very quickly.

regards