Multiconductor transmission line model with frequency dependent parameters in time domain

In the paper, we present a fast and effective method of modeling a coupled interconnect in the SPICE simulator by means of S-parameters. The paper presents an approach based on the method of successive approximations, but taking into account the dependence on the frequency of line parameters. The concept is to use a rational approximation of the matrix of per-unit-length parameter of the line calculated for each frequency. In our approach, we implemented the scattering parameters of the transmission line in the SPICE simulator.