antenna simulation software

Hello friends,
Does anyone know any software which is used for simulation of an antenna in Linux.
I know NEC. but you cannot make horn or helix in it.
Please suggest me.

Thanks
Abhishekabs

Hfss Have a Linux version. CST will have it in the near future

IE3D and CST now have a GUI for design in windows client, and Linux solver running on server.
You build the structure in win environment and sending it for solving the job to the server that, runs the Linux Solver.

pl

Hi,

I recommend AN-SOF; it is well suited for helix and curved antennas.

What about feko or WIPL-D?
MoM will do better than FEM.