display the impedance characteristic of an antena - CST

hi;
i want to get the impedance characteristics of an antenna by usiing CST-microwave studio. but i dont know how can i do that?
thanks for helps.

Siumalate the antenna. and go (click) on

" Results" + "S-Parameter Calculations" + "Calculate Z and Y matrixes"

And you can go to the 1D results the impedance caracteristic will be on "Z matrix" folder .
I hope it helped

thanks for your helps angolaX