FDFD rectangular waveguide resonant frequency

Hi everyone,

I have following problem and I believe someone of you will help me.

My task is to calculate resonant frequency of rectangular waveguide (operating with TE10 mode) utilizing FDFD method.

I know that problem must be formulated as a eiegen value problem, where eigen values are resonant frequencies.

I will be grateful for any suggestions/examples/materials how to do this.


Best Regards
Lukasz

I have already solved the problem.