The ADS simulation of transistor level mixer schematic produces Sopt Rn and
NFmin
The problem is ...
system mixer models Mixer Mixer2 MixerHBData produce different result for noise figure when Sopt Rn and NFmin are used (I have idea why...)
How to model mixer noise using system mixer model?
Somebody know proper procedure?
My procedure was
1.Simulate transistor level ckt obtain Nfdsb Nfssb and twoport parms Sopt Rn and NFmin
2.Substitute two port parameters to system mixer model like Mixer2
3.Simulate with Mixer2 and see NFdsb and NFssb
I see that Mixer2 produce different NFdsb and NFssb