Convert S-parameters to Y-parameters



y_params = s2y(s_params,z0) converts the scattering parameters s_params into the admittance parameters y_params. The s_params input is a complex N-by-N-by-M array, representing M N-port S-parameters. z0 is the reference impedance; its default is 50 ohms.


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Define the s-parameters and impedance.

s_11 = 0.61*exp(1i*165/180*pi);
s_21 = 3.72*exp(1i*59/180*pi);
s_12 = 0.05*exp(1i*42/180*pi);
s_22 = 0.45*exp(1i*(-48/180)*pi);
s_params = [s_11 s_12; s_21 s_22];
z0 = 50;

Convert the s-parameters to y-parameters.

y_params = s2y(s_params,z0)
y_params = 2×2 complex

   0.0647 - 0.0059i  -0.0019 - 0.0025i
  -0.0826 - 0.2200i   0.0037 + 0.0145i

Input Arguments

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N-port- S-Parameters, specified as a N-by-N-by-M array of a complex numbers, representing M N-port S-parameters.

Reference impedance of N-port S-Parameters, specified in positive real scalar as ohms.


z0 must be a positive real scalar or vector. If z0 is a vector, then the vector must be equal to the number of network parameter data points or frequency vector.

Output Arguments

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N-port Y-Parameters, specified as a N-by-N-by-M array, representing M N-port Y-parameters.


You can also use network parameter objects to perform network parameter conversions. For more information, see RF Network Parameter Objects.


[1] Reveyrand, T. “Multiport Conversions between S, Z, Y, h, ABCD, and T Parameters.” 2018 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), IEEE, 2018, pp. 1–3. DOI.org (Crossref), doi:10.1109/INMMIC.2018.8430023.

See Also

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Introduced before R2006a