S-parameters plots

dear all,

I had completed simulating a patch antenna in CST..

It has a ground slit. I modelled the patch and ground of the antenna using Extrude polygon method..the results for s- parameters seem ok.

But my problem is, i would like to plot the s11 for different ground slit length..namely 3 mm, 4 mm and 5 mm....

How to do this so that I cant get all the plots in the same graph...?

How to combine the results for various length changes in the same graph.?

Thank you for your consideration.

you can do this through time solver ,parameter sweep .firstly define the ground slit length as parameter say L in parameter list