Re: FSS simulations
I recommend to use Version 10, its very easy then.
If you don't have, I suggest you try the following, it worked well with my last work.
1) Build an Airbox: a cuboid with z-dimension from -2lambda to +lambda/2
2) Set up Periodicity (Master/Slave boundaries) to the sides
3) Set up Radiation or PML to the top and bottom end of the cuboid
4) Model the FSS-cell in x- and y-direction at z=-3/2 lambda
5) Use a plane wave excitation with k=(0,0,-1) propagation in the -z-direction
6) Calculate the mean value in the z=0 plane for the ComplexMag_E with the Fields Calculator. This works ONLY with a plane wave emerging early, check the plots to be sure (Huygens principle). You must calculate the value for each frequency step and use a different program to make diagrams, I used Excel. Its time-consuming, but it works.
At the frequency at which surface waves are excited, this setup will not give valuable results.