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s2y

Convert S-parameters to Y-parameters

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Syntax

y_params = s2y(s_params,z0)

Description

y_params = s2y(s_params,z0) converts the scattering parameters to the admittance parameters.

example

Examples

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Open Live Script

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 an N-by-N-by-M array of a complex numbers, where M represents the number of frequency points of N-port S-parameters.

Reference impedance in ohms, specified as one of the following:

  • Positive real scalar when you want to specify the same the reference impedance for all ports in the network.

  • Positive real vector of length N when you want to specify a different reference impedance for each port in the N-port network. (since R2023a)

  • Positive real vector of length K when you want to specify a different reference impedance for each in the K frequencies in the data. (since R2023a)

If the reference impedance is a vector and the number of ports N equals the number of data frequencies K, N == K, then the sparameters object will assign each element of the vector to each port of the network. To specify reference impedances for each frequency in this case, specify Z0 as a 3-D vector of length 1-by-1-by-K.

Output Arguments

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N-port Y-Parameters, returned as an N-by-N-by-M array of complex numbers, where M represents the number of frequency points of N-port Y-parameters.

References

[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.

Version History

Introduced before R2006a

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See Also

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