Impedance and S-Parameters

[Catalyst]

smith chart software berne university

Hi there guys,

Quick query........Is it possible to convert from impedance to s parameters....is the smith chart the only way?



Cat

 

[haitaoz]

z-matrix to s-parameters

a lot of software has this transfer from Z to S,such as ads

 

[Catalyst]

Is there any method i can use without any software?

 

[jian]

Hi, Catalyst:

You can just follow the equation for it.

S = (Z-Zc)/(Z+Zc)

Just treat them as matrices. It should be simple if you know how to program. You can find matrix solvers in many places.

Regards.

 

[malijan]

you can use the equations fro converting impedance to S parameter and /or use free smith chart software from internet
there is one good smith chart capable of doing this from Dr fritz dellsperger at berne university. SmithchartV2.02

https://fritz.dellsperger.net/
good luck

Mehdi

 

[Catalyst]

thanks for the replies guys

Could anyone give me an example calculation to go by using the equation that jian gave above. I'm having trouble with it.


Regards


Cat

 

[jian]

Hi, Catalyst:

The general conversion equation is:

S = Inv( Z + Zc ) * ( Z - Zc )

Z is the z-matrix. Zc is a diagonal matirx with Zc_i as the (i,i) element and other element as 0. I think you can implement it easily on Matlab since all the matrix operations are available on Matlab. Certainly, you can try to use C++ or other languages. There are many matrix operations libraries available.

Best regards,