Transient Simulation of Lossy and Nonuniform Multi-Conductor Transmission Lines by Time Domain Finite Element

A new method - time domain finite element (TDFF) - for the transient simulation of lossy and nonuniform multi-conductor transmission lines (MTL) is presented. The method is based on the integral transformation of the telegrapher's equations, combined with recursive convolution method to get the discrete time and space model for frequency-dependent transmission lines. No special technique is required to ensure the stability of the method as in the case of frequency domain moment-matching methods. At last, several numerical experiments show that TDFE-based modeling leads to high accuracy as well as high efficiency.