Matlab based time-domain simulation of multiconductor transmission line systems

Abstract

The paper deals with a technique of the time-domain domain simulation of transient phenomena in linear distributed systems using Matlab language. The distributed parts are formed by multiconductor transmission lines (MTL) which can generally be nonuniform, frequency-dependent, and under nonzero initial conditions. In principle the solution is formulated in terms of a modified nodal admittance (MNA) equation method in the frequency domain. Then an improved fast method of numerical inversion of Laplace transforms (NILT) in vector or matrix form is applied to gain a solution in the time domain. This NILT method is based on the FFT in conjunction with the quotient-difference algorithm of Rutihauser to ensure both high speed of computation and sufficient accuracy of results.