what error in mushroom resonant here?

hi all,i make steps and run mvba file already found in attached newfolder(2),also i attached the presentation from cst,i run free,pec,actual model but the phase of free not like in the presentation,so the total result of actual model phase result not like that of actual one in the presentation ,what error i do,is there is other steps in design
first i run open wall model,then pec model then actual model and open macro and open the file of reflection_method.bas,pls help me urgently ,thanks so much

abdoeng does your macro works on CST 2008 ?

mine not and I'm doing the same step as you


Moreover some people uses the waveguide method but the problem si not the same:
with a plane wave you use periodic conditions in ±x and ±y. So you have an infinite substrate in both directions.

However, with the waveguide method, the diagram simulate is for an infinite row of EBG cell.

So that's not totally the same thing.

Don't you think so ?