Excitation for Helical structure

Hi,

I'm trying to simulate a solenoid and find out the B field inside the coil. I was wondering what kinda excitation should i use?
Wave port or lumped port?
And where do i place the ports? at the ends of the coil?

Cheers
huiyuzz

huiyuzz,

Do you have another net for return current ?
What is the frequency range ?

Itai