Hi,I am designing a capacitor using the microstrip how can I measure my capacitance in the sumulation for Momentum ADS layout design.
I have perfect matching port terminals 50 Ohm and interdigital capacitor.
Why don't you try making some circuit that will help you measure the capacitance, by measuring other thing. It is not a hard thing to do at all, especially if you have oscilloscope...
I maybe missing what you are asking, but why not look at Z12 or Y12. At low frequencies, these values will be dominated by the capacitance. So Y12 = 1/Z12 = j*w*C.