aaron_do wrote on Apr 6th, 2014, 4:22am:Hi,
so for your 70 G plot, I guess you're saying the gain is too low? You should be able to match small signal simulations with PSS at low power. As Sheldon mentioned, you should probably be using the harmonic balance engine for PSS but that probably isn't the reason for the gain mismatch. How did you simulate your small signal gain?
For the 10 G plot, are you plotting the correct harmonic (i.e. the 70G harmonic).
Aaron
Yes I meant that the gain is too low (it doesn't correspond to the small signal gain) and there is even no input intersect of the two lines.
For the small signal gain, I used s parameter simulation for it. the s21 is the small signal gain.
For the 10GHz plot, I was actually plotting the 10GHz harmonic. So another question is that regardless of the beat frequency, I should always plot the curve for the operating freq i.e 70GHz in this case