S-parameter measurement system for wideband non-linear networks

摘要

A system for determining scattering parameters (S-parameters) characterizing the behavior of a network applies a wideband stimulus signal containing multiple signal components as input to the network. The system then measures incident and reflected waveforms at all of the network's ports, digitizes and converts the measured waveforms from time domain to frequency domain data, and then computes the S-parameters values for each frequency component of interest from the frequency domain data for that frequency. The system also determines its own error coefficients (E-coefficients) for each frequency of interest from data collected during a sequence of measurements in response to either a sinusoid or a wideband signal and adjusts the computed S-parameter values accordingly.