magnetic and electric field between two plates, with RF frequency

Dear Sir/Madam,

I searched through forum and cannot find the answer to my question.
I am trying to simulate electric and magnetic field between two copper parallel plates (2D axial symmetry).
Electrodes are connected to an RF generator with voltage amplitude of 400 V and frequency of 13.56 MHz.
I am trying by using Magnetic and Electric field module, but I don't know how to implement the voltage source.

Thank you,

Regards,
Grega