Abstract

The FD-TD (finite-difference time-domain) absorbing boundary conditions for one-dimensional wave propagation are adapted to the 3-D SCN (symmetrical condensed node) TLM (transmission line matrix) mesh. The properties of these boundary conditions are characterized for a simple TEM (transverse electromagnetic) waveguide structure, and their applicability to complex structures is demonstrated by calculating scattering parameters for a microstrip step. >

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