Weak solution of the nonuniform multiconductor transmission lines

A time domain technique for the simulation of nonuniform multiconductor transmission lines (NMTL) with external sources is presented. The technique is based on a weak formulation of the NMTL equations obtained through expansion of the voltage and current vectors, per unit length matrices, and distributed sources into a set of locally supported basis functions. The particular choice of these functions determines the approximation order of the method. Examples are shown for practical interest structures.