Analysis of Coupled or Single Nonuniform Transmission Lines Using the Equivalent Sources Method

A method is proposed for analysis of arbitrarily loaded lossy and dispersive single or coupled nonuniform transmission lines (NTLs). In this method, the equations of coupled NTLs are converted to the equations of coupled uniform transmission lines, which have been excited by distributed equivalent sources. The modal decomposition approach is used to decouple the sets of differential equations. Then, the voltage and current distributions are obtained using an iterative approach. The validity of the method is verified using an example.