How can i create a multiport network from several 3 port( or more) s-parameters matrixes (rf toolbox)

Need to write script for calculation s-parameters of multiport network made of connected smaller multiport networks using measured/computed s-parameters matrixes . What is the best way for this?

[John BG]

should the script strictly work on imported data?

or do you intend to control a test instrument?

If so have you already checked that you can control the instrument from MATLAB in separate computer?

John BG

<mailto:[e-mail] [e-mail]>

Answer 1

[MathWorks RF & Mixed-Signal Products Team]

Hi,

You can write a script to import the S-parameters files with the command

s1 = sparameters('filename.s3p')

and then add the S-parameters to a circuit network

hckt = circuit('example');
add(hckt, [1 2 3], s1);

Add as many networks as you want and connect them according to the desired topology.

Define the analysis ports of the network, the frequency, and then compute the S-parameters:

setports(hckt, [1 0], [2 0], [3 0]);
freq = linspace(1e3, 1e6, 100);
Sout = sparameters(hckt, freq, 50);

an example is given here:

Documentation S-parameters