How to import s parameters without RF Toolbox

Hello,

I have a trouble in reading S-parameters files in Matlab with my current license. Could you please give me an alternative solution?

Best,

Mohammadreza

[Walter Roberson]

https://www.mathworks.com/matlabcentral/fileexchange/6080-s-parameter-toolbox-z-y-h-g-abcd-t possibly

[Mohammadreza]

Thank you. It works for me.

Answer 1

[Shawn Rogers]

Here is a method that has worked for me for reading an s2p file from a network analyzer. Adjust accordingly for the number of headerlines and S-parameters.

filename = 'testfile.s2p';
numberOfHeaderLines = 5;
FID = fopen(filename);
datacell = textscan(FID,'%f%f%f%f%f%f%f%f%f','Headerlines',numberOfHeaderLines,'CollectOutput',1);
fclose(FID);
A=datacell{1};

[Simon]

Thanks for your sharing. can you tell me how to read an s4p file from a network analyzer.

[Kishen Someshwar]

Hi Shawn,

Do you have an examnple for a s3p file?

[Giovanni de amici]

don't need an example.

adjust the "numberOfHeaderLines" constant and the '%f%f%f...' format string according to the details of your own .sNp files, where N=2, 3, 4. any unneeded '%f' becomes a NaN (which is not difficult to remove later on).

Answer 2

[Idin Motedayen-Aval]

For completeness, the easiest solution is to use the sparameters function out of RF Toolbox:

https://www.mathworks.com/help/rf/ref/sparameters.html