Convert S-parameters to T-parameters



t_params = s2t(s_params) converts the scattering parameters s_params into the chain scattering parameters t_params.

This function uses the following definition for T-parameters:



  • a1 is the incident wave at the first port.

  • b1 is the reflected wave at the first port.

  • a2 is the incident wave at the second port.

  • b2 is the reflected wave at the second port.


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Convert S-parameters to T-parameters. Define a matrix of S-parameters.

s11 = 0.61*exp(j*165/180*pi);
s21 = 3.72*exp(j*59/180*pi);
s12 = 0.05*exp(j*42/180*pi);
s22 = 0.45*exp(j*(-48/180)*pi);
s_params = [s11 s12; s21 s22];

Convert to T-parameters

t_params = s2t(s_params)
t_params = 2×2 complex

   0.1385 - 0.2304i   0.0354 + 0.1157i
  -0.0452 + 0.1576i  -0.0019 - 0.0291i

Input Arguments

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2-port S-parameters, specified as a 2-by-2-by-M array of complex numbers, where M representing number of frequency points of a 2-port S-Parameters.

Output Arguments

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t_params is a complex 2-by-2-by-M array, representing M 2-port T-parameters.


[1] Gonzalez, Guillermo. Microwave Transistor Amplifiers: Analysis and Design. 2nd edition. Prentice-Hall, 1997, p. 25.

See Also

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Introduced before R2006a