Transmission line modeling of resonant frequencies of a novel microwave resonator.

Hi,

I have a new microwave resonator that resonates at f1, 2f1, 4f1, 5f1, 7f1, 8f1, ...

Please note that 3f1, 6f1, ... are missing out!

I want to model it using transmission lines.

Can somebody help me?

Regards,
Suhas D.