frequency dependent capacitor

I need a frequency dependent capacitor in the simulation. But I cannot find a capacitor modle in the ADS. How can I realize it? Thank you.

Dear
Try to assign a variable expression instead of the capacitor value
hope it help

Yes.
But I cannot use the "freq" variable in the expression. I want to do frequecy sweep, how can I use the "freq" in the expression?

Did you check the help of the ADS ?
try it

You can go to murata web site and get some capacitor S parameters and apply to your ADS.