Abstract: Developments in the transmission-line modelling (TLM) method, to increase spatial resolution using multigrid techniques, and to reduce run-time using efficient formulations of the scattering algorithm are described. It is shown that these result in very substantial improvements in the efficiency of computation and thus to the suitability of the technique as a general solver in design software.
Key words: Mocrovawe circuits, transmision line modeling method, scattering algorithm, spatial resolution.