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s2s

Convert S-parameters to S-parameters with different impedance

Syntax

s_params_new = s2s(s_params,z0)
s_params_new = s2s(s_params,z0,z0_new)

Description

s_params_new = s2s(s_params,z0) converts the scattering parameters s_params with reference impedance z0 into the scattering parameters s_params_new with a default reference impedance of 50 ohms. Both s_params and s_params_new are complex N-by-N-by-M arrays, representing M N-port S-parameters.

s_params_new = s2s(s_params,z0,z0_new) converts the scattering parameters s_params with reference impedance z0 into the scattering parameters s_params_new with reference impedance z0_new.

Examples

collapse all

Define a matrix of S-parameters.

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;
z0_new = 40;

Convert to S-parameters with different impedance.

s_params_new = s2s(s_params,z0,z0_new)
s_params_new =

  -0.5039 + 0.1563i   0.0373 + 0.0349i
   1.8929 + 3.2940i   0.4150 - 0.3286i

Alternatives

The newref function changes the reference impedance of S-parameters objects.

See Also

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Introduced before R2006a

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