Thank you for your reply.
Can I understand like this? To obtain the E field and H field from the boundary conditions of the simulation area, calculation on the outer line, which include the mesh is also required. So, the location used for the calculation is indicated by the outer line.
In addition, when the actual periodic is implemented, the inner lines will overlap. If the structure is set incorrectly and the E and H values at the left and right boundaries are different, does the simulation derive the average value? (And I found my figure to be a bit erroneous.) Furthermore, when checking the 6 fields separately, is it correct to understand that the calculated grid is different?
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