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How can I implement an RF circuit and measure S-parameters using MATLAB?

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The figure above is the circuit diagram of the bandpass filter and the resulting S-parameter data.
The design of the above filter can be checked at the link below.
I would like to implement the above circuit using matlab code or simulink and plot the S-parameters (S11, S21).
I have never used simulink, so it is difficult to implement, so I want to implement it using matlab code. Is it possible to find the equivalent circuit of the above circuit and then find the s-parameter?
Or is it possible to obtain the s-parameter after designing the circuit in the same way, or is it possible to do both?
And thank you for telling me how.

Answers (1)

Prathyusha Appalla
Prathyusha Appalla on 13 Feb 2023
I understand that you are trying to identify S-parameters for an RF cirucit. Referring the following information might be of good help to you.
Using Simulink:
Using Simulink, the purpose can be achieved hassle-free. The s-parameter of a Chebyshev filter can be measured by connecting the Chebyshev filter block to S-Parameter Testbench block in Simulink.
Refer to this documentation page for further reference: Measure S-Parameter Data of Chebyshev Filter - MATLAB & Simulink (
In order to design a chebyshev filter cheby1() MATLAB function can be used. For more information refer to the following documentation link:
The S-parameters of a Chebyshev filter can be measured by sparametersreferring to the following documentation link:
Additionally, to design any RF circuit, The RF Design and Analysis Tool can be used which provides the ability to,
  • Create and import circuits.
  • Set circuit parameters.
  • Analyse circuits.
  • Display circuit S-parameters in tabular form and on X-Y plots, polar plots, and Smith-charts.
  • Export circuit data to the MATLAB workspace and to data files.
Refer to the following documentation link for more information: The RF Design and Analysis Tool - MATLAB & Simulink (


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