Convert S-parameters to Z-parameters


z_params = s2z(s_params,z0)


z_params = s2z(s_params,z0) converts the scattering parameters s_params into the impedance parameters z_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. z_params is a complex N-by-N-by-M array, representing M N-port Z-parameters.


z0 can 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.


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

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

Convert to Z-parameters.

z_params = s2z(s_params,z0)
z_params = 2×2 complex
102 ×

   0.1141 + 0.1567i   0.0352 + 0.0209i
   2.0461 + 2.2524i   0.7498 - 0.3803i


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

See Also

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Introduced before R2006a