accuratest EM_Simulators

You are asking for 1/2rumor+1/2truth.

Tell us what you want to simulate.

I want to simulate structure of palanar antenna for example LP Planar antenna, Sinuous Antenna, Patch array antenna and ...
which simulator is accuretest?

Best regards

I trust HFSS ,but for wideband simulation CST is still accurate

They all have its advantages and disadvatages.
The accuracy you will obtain is depended on that how do you use them.

For planar antenna simulation, IE3D is exact enough.

XFDTD5.1 from remcom.com,one of best program
in bref any program based on FDTD simulation,the FIDELITY AND IE3D from zeland.com also
regards

i have tried both hf$$ AND IE3d , hfss is time consuming
ie3d fast and give a good acuracy

HFSS is memory consuming and therefore time consuming because is a FEM code.

Regards

i think that hfss simulation only reliable for over vhf frequency for vswr results in antenna application.