If there are any COMSOL gurus here, I want to simulate a 3D RF system infinite in 1 direction. I realize I need to use PML's, but am unsure how to configure them. it seems that simply scaling them by lambda isn't enough - anyone know if I need to configure the material itself in a special way? Thanks!
EDIT: I want to solve a problem containing a infinite (in +z direction) cylindrical waveguide filled with vacuum with PEC walls. How can I replace (some of) the infinite waveguide with a PML?