#### mohamis288

##### Full Member level 3

if you consider the diagrams of RFICs, you find out that the "power gain-output power" or "output power-input power" diagrams have nonlinear relation. so is it correct to perform S-parameter simulation to obtain power gain using S21 parameter?

I mean, in S-parameter simulation, we do not define input power. so according to what parameters, ADS performs s-parameter simulation? in my opinion, it is better to give an input signal (pulsed RF, sine wave , ... ) with certain power and then measure output signal. in this way, we can calculate power gain associated with the specific input power. is it correct? I have attached the diagrams.

I mean, in S-parameter simulation, we do not define input power. so according to what parameters, ADS performs s-parameter simulation? in my opinion, it is better to give an input signal (pulsed RF, sine wave , ... ) with certain power and then measure output signal. in this way, we can calculate power gain associated with the specific input power. is it correct? I have attached the diagrams.