Hello,

I need to simulate a Slot array in CST Studio Suite  . In the first step, I am going to simulate the waveguide feed excitation to the slot array waveguide. I intend to define Periodic boundary conditions(PBC) for two planes in CST. But the boundary condition in CST is limited to only the Howeverboundary box about my all components, not the specific one. For example, I want to define PBC for the above waveguide as you can see the this picture.

How can I define the Periodic wall in the CST?

Thank you.