Re: Frequency selective surfaces simulation using HFSS 8 or
Your problem sounds like mine. What I did is the following (HFSS9.2):
I Build an Airbox, to get some distance (>lambda) between the FSS an the model border. You can use Radiation while not having large angles. So if your planewave's k=(0,0,1) it will work. I use PML.
The borders to the sides must then be periodic boundaries. Assign Masters an Slaves, see the helpfile!
In the postprocessing switch the plot to "scattered field" (HFSS->Fields->Edit Sources). The scattered field below the FSS, divided by the incident field (I set it to 1V/m) equals the reflection coeff. Use the calculator to get results (I calculate the mean on arbitrary plane).
In this case you can only make a discrete frequency sweep. I takes long, but works well.