Mixer noise modeling using ADS

Hi

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?

Regards

what do mean that the system level simulation give different , and did u measured the performance of a circuit , then u want to make a model for it

khouly

Thanks for reply

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

check ur analysis type u use with Mixer2 ,
mainly check the notes in the manual about Mixer2

could u upload ur project to check it ?

khouly

Yes

i have check the file , but i donot know what is the problem , everything seems to be good

maybe someone can help

khouly