Simulation of coupled transmission lines by multidimensional wave digital filters

The application of multidimensional wave digital filters to the numerical solution of partial differential equations (PDEs) has been described in several publications for various physical problems under investigation. It has been shown how linear boundary conditions imposed on the PDEs can be incorporated into the resulting discrete algorithms. This was done for a transmission line of finite extent, which was terminated by lumped element circuits at both ends, as the physical system to be simulated. A generalization of this approach is presented showing how uniform coupled transmission lines with lumped circuit terminations can be treated as well