How can we calculate/plot z and y parameters given an S2p file for a particular set of measured data?

Hello,

I have been trying to use the existing function build in matlab that computes S parameters into corresponding Z and Y parameters

However, I am not able to store plot each parameter versus frequency seperately since they are stored generically through the command

Y=yparameters(filename.s2p)

Z=zparameters(filename.s2p)

I would greatly appreciate it as I am new on using such functions on matlab.

Thanks

[Mena Maurice]

y =

yparameters: Y-parameters object

NumPorts: 2

Frequencies: [79×1 double]

Parameters: [2×2×79 double]

rfparam(obj,i,j) returns Y-parameter Yij

for instance here is the data stored however, how can we extract it for plotting as well as obtain the magnitude and phasor quantites of each parameter

Thanks

Answer 1

[SANKALP DEV]

Hey Mena,

I understand that you are currently working on the task of extracting and plotting the magnitude and phase from a Y-parameters object.

Since you have already accessed the Y-parameters object, I'd like to guide you through the necessary steps to accomplish your goals.

Please refer to steps given below:

• Extract the frequencies and parameters using dot notations as shown below.

freq = Y.Frequencies; 
para = Y.Parameters; 

• Extract the individual Y-parameters, using ‘rfparam’

Y11 = rfparam(Y, 1, 1); 
Y12 = rfparam(Y, 1, 2); 
Y21 = rfparam(Y, 2, 1); 
Y22 = rfparam(Y, 2, 2); 

• Calculate the magnitude and phase of each Y-parameter as follows.

mag_Y11 = abs(Y11); 
phase_Y11 = angle(Y11); 

• Finally, use the plot function to plot phase and magnitude.

For more information about the functions used above, please refer to following MATLAB documentations:

• https://www.mathworks.com/help/rf/ref/yparameters.html?s_tid=doc_ta
• https://www.mathworks.com/help/antenna/ref/rfparam.html?s_tid=doc_ta
• https://www.mathworks.com/help/matlab/ref/angle.html?s_tid=doc_ta

Hope it helps.