ggnhdk
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For exemple, RF=39GHz, OL=38GHz, IF=1 GHz. I want the coefficient reflexion on RF and IF access. The AC to 1 mA it 's the choice used in ADS in all design guides, they make the ratio Voltage/current to get the impedance.
I think I can get these parameters with a PSS+PSP analysis by setting a frequency range, the different ports with the right harmonic for each port and I get the curves S11 S22 for each power OL specified in swepp parameter in PSS. The problem is that I have the port RF @39 and the IF @1, but it traces S11 AND S22 @39GHz +- the frequency sweep range specified in relative sweeptype. I have to launch another simulation and specify the same harmonic for the port RF and the port IF to get the right scale on X axis ie the IF +- freq range.
DO you have an idea for setting the parameters of the simulation to get the Sxx at the right scale?
EDIT: I have just changed the frequency sweep range for the PSP simulation "from 0 to 40G" to get the curves for all the frequency domain and if I compare the results to the results of Advanced Design System, the good values are for the range around the RF frequency. I don't understand why the S22 which concerns the IF access seems to be the right result at 39GHz, not at 1 GHz...
thanks for your help ken.
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