De-embedding cables using s4p files

[jeiB]

Hello everyone,

I am working on de-embedding s4p files for different types of cables. I have an s2p file for the test fixture alone. The s4p files obviously includes the cable and the test fixture.

Using Matlab, I was able to get the transfer function of the de-embedded cables by dividing the tf of the cable by the tf of the fixture.

Now I would like to calculate the new s-parameters and export them to a new s4p file.

Im a bit confused on the procedure. Can I convert the de-embedded tf back to s-parameter? Or do I want to use the deembedsparams function in Matlab ?

Also, does Matlab have a function that writes a file with the touchstone format?


Thanks a lot for the help,