Calculations of frequency dependent transmission line model for coupled exponential line

The paper presents an application of a fast and effective method of modeling a nonuniform interconnect with frequency dependent parameters for multiconductor exponential transmission line. The model uses the S-parameters. The approach is based on the method of successive approximations. The approximation of the scattering parameters is calculated. For the exponential line in steady state only second order approximation is needed. The transient state for trapezoidal source is also presented. For that case the fourth order approximation is needed. Comparisons of the calculated results with the exact calculations are performed for exemplary exponential transmission line.