how to find reflection phase diagram with CST mws

hii guys
I am working with EBG designs and need to find reflection phase diagram for the same. I am using CST Studio Suite 2011 (MWS) for my simulations.
i build my model normaly.
I have selected periodic boundary for xmin, xmax, ymin, ymax, open boundary for zmax and Et=0 for zmin.
plane wave excitation in zmax. I have used the plane wave excitation.
then i run my simulation with transient solver
s-parametre does not appear in the results.
plz help
best regards

I think you may use waveport excitation instead of plane wave in order to find s-parameters

hi
i have a similar problem
did you find how to solve it?
I'd be really appreciated if you help me

Hi
did you get answer to the problem.
if yes please share the details regarding reflection phase analysis of ebg.