I can't undersrtand what on earth you want to do.
RF_Designer wrote on May 9th, 2010, 5:42am:in case when the simulated and measured results are not agree especially in S11.
What do you mean by
simulated and measured results ?
What conditions do you apply for simulation ?
Do you include package model and PCB model in simulation ?
Do you correctly do de-embedding in measurement ?
Do you correctly do calibration of reference plane in measurement ?
RF_Designer wrote on May 9th, 2010, 5:42am:in ADS sof
What is it ?
Describe correctly using industrial standard terminologies.
If your simulation and measurement conditions are perfect, evaluate equivalent linear circuit model by fitting from S-parameters.
Then perturb parameters of equivalent linear circuit model such as gm, cin, cout, etc.
http://edocs.soco.agilent.com/display/ads2009/Optimizing+A+Linear+FET+Model+to+M...But I think your problem is simply you can't reflect actual measurement conditions in simulation.
http://www.designers-guide.org/Forum/YaBB.pl?num=1236164999http://www.designers-guide.org/Forum/YaBB.pl?num=1245915183/2#2The followings are general notes for you.
- Always describe correct tool's name and vendor's name which you use as tool or simulator.
- Don't do multiple posts which are same content.
- Don't request source code or behavioral model without any efforts.
- There are many simulators which have analyses called as PSS, PAC and Pnoise.
-
Describe in detail with using correct terminologies.- Warnigns are different from Errors.
- ADS is not name of simulator.
- There is no tool which name is Cadence.
- Don't use Direct Plot of Cadence ADE blindly without knowing definition.
- All gains in Direct Plot of Cadence ADE are "right", "true" and "practical" voltage gain.
- Don't mix up Simulation with Post Processing. They are completely different phase.
- MATLAB are different from Simulink.
- Learn measurements using actual instruments. Not "EDA Tool Play