Hi all,
with Unit Cell you can't use the macro:
Results>>S-parameter Calculations>> Deembed S parameter
you have to do it by yourself with the template post processing:
The steps are these:
1/ Load the file corresponding to your simulate phase: normally it's pZmax(1)Zmax(1).sig
((Load 1D Result))
2/ You need to have a file which contains all the frequency points. For that Copy a *.sig file in your CST folder and rename it as Fband.sig (for example). Then In CST copy one of your result, for example, your phase result.
Open Fband.sig with excel, delete all and paste it.
EDIT: Then delete all data except the first colum (which contains frequency points).
Copy this colum and paste it in the second colum
--> So you will have two colums which the same frequency points
Save it and load it as an external file in the template post processing (Load 1D Result)
3/ Calculate the deembeding:
In the Mix 1D Results window, enther the equation:
-2*(2*180*A/0.3)*Deemb/1000
with A=Fband.sig
and Deemb is the distance between your port and the surface.
I tune the Deemb distance in the background properties: Upper Z Distance = Deemb =20mm (at least).
4/ Calculate the phase reflexion to the surface:
Open again a Mix 1D Results Window and type:
A-B
with A=pZmax(1)Zmax(1).sig
B=The name of the Mix 1D Results of (3/)
5/ You can wrap it with the Unwrap/Wrap of 1D phase...
I hope you will understand (sorry for my english)
I'm currently writing an application note for CST which recalls all methods to caracterize EBG structures.
Regards
piboo