Feed without ground log periodic antenna

Hello

I am new with the CST software and i have a project on log periodic antenna.

I don't know how to create a feed without ground.

LPNT1.rarThe file with the model is attached. Please guide me what should i do.

Thanks in advance

Hi,I

I've calculated log periodic antennas using ANSOF. CST is too advanced for this application. I think there is always a suitable software for each antenna simulation, depending on the antenna complexity. May be you could try with a wire MoM software easier to use.