The ideal attenuator with (power) attenuation is frequency independent and the model is valid for DC and for AC simulation. It is determined by the following Z parameters.
(9.72) |
(9.73) |
The Z parameter representation is not very practical as new lines in the MNA matrix have to be added. More useful are the Y parameters.
(9.74) |
Attenuator with (power) attenuation , reference impedance and temperature :
(9.75) |
The scattering parameters and noise wave correlation matrix of an ideal attenuator with (power) attenuation (loss) (or power gain ) in reference to the impedance writes as follows.
(9.76) |
(9.77) |
(9.78) |
(9.79) |