scattering floquet hfss

Hi, I am trying to obtain the scattering parameters using the "incident wave - plane wave" excitation in HFSS. There is no option to plot these. Must I compute the power using a surface integral of the Poynting vector? I also looked into to using the "Floquet mode" excitation, but the Scattering parameters were difficult to interpret.

I'd like to ask this question too.

You could use radiated power to calculate scattering parameter ,but may use matlab for post-processing.See the definition of radiated power and your scattering parameter,get the difference about them.