Can anyone explain about the difference b/w Perfect E and Finite conductivity in HFSS.
When should use those perfect e and finite conductivity options for materials?
If you don't care about field penetration into the conductor or resistive losses, it's better to use PEC for simplicity. HFSS treats the surfaces of PEC object as PEC boundaries so that there exist no electromagnetic field inside. You can define PEC boundary on 2D sheet objects to represent lossless conductors such as transmission line traces or patch antenna elements.