Hi Aastha,
As per my understanding, you want to plot differential s-parameters from .s4P file in MATLAB.
You can use the function ‘s2sdd’ to convert s-parameters into differential mode.
Example:
S = sparameters('Random.s4p');
s4p = S.Parameters;
s_dd = s2sdd(s4p);
Let say your differential mode s-parameters are stored in a variable “s_dd”.
If 's_dd 'is a 2x2x1496 complex double, to plot the sdd21 you should convert it to double.
To do so you can do the following:
SDD_Parameters=(abs(reshape(s_dd,4,1496,1)))';
SDD_Parameters is a 1496x4 double. Third column in SDD_Parameters represent SDD21.
SDD_21= 20*log10(SDD_Parameters(:,3)); % Magnitude in dB
To get frequency range
Freq=S.Frequencies;
Which would be 1496x1 double.
Now you can use plot function to plot SDD21 vs Freq.
plot(Freq, SDD_21);
For more information go through the following MATLAB Documentation:
