I would like to calculate the impedance between the two plane of a PCB when electromagnetic fieds expanse in the dielectric to illustrate how the cavity resonate.
My aim is to put some GND via to illustrate the resonnance changing.
I tried to make a wave port on top and on bottom to get S parameter but got error because plane on bottom is perfect conductor.
So I am trying to use field calculator to estime impedance. I first try to get capacitance using Q=CV ; I can have Q on top and Q on bottom but to get Voltage across top and bottom I need to integrate E along Z between the two planes... but for each line on the volume... I don"t know how to do ??
Planar inductance of a square area has the same near zero inductance regardless of its size. But then at wavelengths > 10% path length with gap capacitance it becomes a dielectric resonator antenna.