[SOLVED] How to Calculate the one port S-Parameters ?

[naveel]

How can we compute the One port S-Parameters ?
I want to compute S-parameters for one port means, if we take a resistor in series with one end grounded and other terminated
with 50 Ohm. Kindly help me.

Regards,
Naveel

 

[rotmanlens]

Hello

With only one port,you will be able to find only one value which is s11(reflection coefficient) which is the ratio of power reflected to total power. can you post your circuit?

Regards
Chachito

 

[naveel]

I have attached the file of my circuit.

 

[rotmanlens]

And there is no source?

regards
Chachito

 

[naveel]

There is a source like any arbitrary value of voltage and current. Basically i am doing this in ADS, So we do not have to
give the source if we are using S-PARAM. But the problem is i have to calculate it numerically.

Regards,
Naveel

 

[albbg]

The S11 parameter can be calculated as:

S11 = (Z - Zo)/(Z + Zo)

where Z is the impedance of the load and Zo the impedance of the source.

In you case the source, represented in ADS by the block "TERM "is Zo = 50 ohm, while the load is Z = 3.25 ohm then

S11 = (3.25 - 50)/(3.25 + 50) = 0.878

However in general S-parameter are frequency-dependent complex numbers since almost always Z is not a pure resistance.

 

[naveel]

Thanks for your concern and this solved my problem.

Regards,
Naveel