how to find S-parameters of a given circuit

[anoopskondattu]

How can I find the S-parameter of the LNA which I have designed. Is there any way to calculate S-Parameter of a circuit. So that I can do the Stability and Noise analysis of the same.
Specs
Topology used : Inductively Degenerated Cascode Toplogy.
Technology used: 130nm.
Frequency of operation : 1.7GHz.

Please don't ignore

Regards,
Anoop S

 

[albbg]

You have to use an RF simulator able to perform a s-parameter analysis. Starting from your circuits you can extract the parameter to a file or analyze them inside the simulator. There are many, like Agilent ADS, AWR Microwave office, etc.
Or, build your circuit and exctract the parameters using a Network Analyzer.

 

[Ow@i$]

either simulate in ADS... n check or if you have any network analyzer use it to check

 

[anoopskondattu]

Sir,

Can we calculate it manually?

What all parameters do we require to simulate it in ADS or some other simulation software??

Thanx in advance

 

[Ow@i$]

i don't think so that such a thing could be calculated.....!!! as it involves quite a lot of factor that can't be included mathematically...
for simulation in ADS just terminate your LNA with 50 ohm both sides include S parameter block.. and sweep your circuit on desgined frequency range

 

[anoopskondattu]

Ok sir.......But I haven't used ADS. Can I do the same with HFSS or ANSOFT Designer? Any idea??

 

[Ow@i$]

i have not used them .. but they will be there for sure.. you have to find yourself