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Simulators >> RF Simulators >> 2-port (floating) impedance measurement in ADS
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Message started by DoYouLinux on Dec 2^nd, 2010, 2:32am

Title: 2-port (floating) impedance measurement in ADS
Post by DoYouLinux on Dec 2^nd, 2010, 2:32am

Hi all,

I am wondering about a simple thing. In ADS, I have a lumped network consisting of a series branch (L and R) and a shunt branch (C and R), as shown in the attached figure. If I want to measure the impedance between both terminals of this lumped network, how should I proceed ? Clearly, I cannot ground the terminal at the shunt branch because this will eliminate the shunt branch.

Is there any building block in ADS that allows me to get a 2-terminal impedance like this network ? I need to extract this impedance to be used in a MeaEqn.

It seems that "Zin" block is not for floating impedance like this one, it should be for measuring impedance of a grounded network.

I should figure out how to do, but it seems not clear to me now.

Please suggest :)

DYL

Title: Re: 2-port (floating) impedance measurement in ADS
Post by RFICDUDE on Dec 2^nd, 2010, 3:53pm

ADS has convenient measurement functions to convert S-parameters to other parameters such as Z or Y parameters.

A measurement equation will let you set some variable using the function

Z=stoz(S) I think is correct then you can break out Z11 and Z22 in the dataset and look at the real and imaginary parts.

I used to use this all the time for looking at EM simulation results for spiral inductor modeling.