A numerical model for simulating linear lossy transmission lines ended
with nonlinear resistors is described. It based on two complementary
formulations of the telegrapher's equations and uses the Galerkin meth
od. The proposed approach appears computationally less cumbersome than
that based on the time-domain convolution method, especially when the
analysis of multiconductor transmission lines is considered. Particul
ar attention is paid to the uniqueness of the solution and to the conv
ergence of the numerical approximation, Complementary formulations pro
vide a powerfull tool to study the convergence.