Really appreciate your response.

  1. I don't understand the question with the first one. I don't know this could be an answer, I usually follow the youtube video below
  2. Those are Perfect E sheets.
  3. Just an air gap. I just want to see what will happen if I put two different FSS pattern put together
  4. when it comes to simulating in a unit cell, I don't know how to make an air box and assign a Floquet port.

    I will attach a link to the youtube video that I used as a reference.

The problem that I have is when there are two different shapes of FSS and if I want to put it together (or overlap with a gap), How I should simulate it through the HFSS.