Save S-parameter in matlab

Hello,

I want to create S-parameter(.s2p) file in MATLAB.I have following information stored in matlab.

Freq--stored as 2650*1 double and SParameter--stored as 2650*4 complex double

--vinoth

[Vinoth]

.s2p should be in TOUCHSTONE format

Answer 1

[Mark]

If you have freq and data variables of the appropriate size, use the rfwrite function in RF Toolbox:

>> size(freq)

ans =

202 1

>> size(data)

ans =

2 2 202

>> rfwrite(data,freq,'myfile.s2p')

alternatively you can use rfwrite on sparameters objects:

>> S = sparameters(data,freq)

S =

sparameters: S-parameters object

NumPorts: 2

Frequencies: [202×1 double]

Parameters: [2×2×202 double]

Impedance: 50

rfparam(obj,i,j) returns S-parameter Sij

>> rfwrite(S,'myfile2.s2p')

Answer 2

[Abhishek Gupte]

1. You need to create an RF Data Object from your available data. Doc page is here;

2. Ensure that the dimensions of each of the properties of the RF Data Object match the standard dimensions. As a reference, use this:

orig_data=read(rfdata.data,'default.s2p')

3. Use the WRITE function as described here.

4. The References for the WRITE function as mentioned in the documentation page is EIA/IBIS Open Forum, "Touchstone File Format Specification," Rev. 1.1, 2002