Amrita Pati
Ansys Employee

Hi Duarte,

Thanks for explaning, that makes things much clearer. So, if I were to look at the two waveguides and the EME region from the top (x-y view), would it look something like this?

At this point I am thinking that one of the possible causes of the expansion error could be radiative leakage in the vertical direction. But I would like to make sure that I understand the geometry correctly before I come up with more details.