Duplexer cavity sim using EMPro or SemCad

Hi

I'm about to start a project on designing a rf cavity duplexer. Many of these are made and sold commercially but this is about how to actually build one _not_ the trial and error way.

This will involve EM simulation with either Agilent EMPro or Semcad. Unfortunately I'm new to both of them and to get started I'd be very happy if I had some specific kind of tutorial about cavities. There are quite a few tutorials included with EMPro but so far I was unable to find one about cavities...

Can anyone help?

Regards
Martin