How to calculate the impedance

Hi everyone,

I'm trying to calculate the impedance after feeding my set-up with a constant voltage.
As I have frequency-dependent parameters (relative permittivity and conductance), I expect complex values.

Is there any option to right away calculate the impedance in COMSOL?
Or do I first have to calculate other values, e.g. current density?

My problem is that I can only find the options: Average, Integration, Maximum and Minimum as regards the simulated voltage plot.


Thank you!