Enhanced spatial network method for the analysis of open microstrip discontinuities

In this paper, a new technique is presented for the numerical analysis of open boundary three-dimensional (3-D) vias embedded in multilayered strata. This approach is based on an enhanced spatial network method (SNM) algorithm, and leads to speed-up factors of 10-12 over the standard SNM implementation. Absorbing boundary conditions, based on the perfect matching layer (PML) concept, are implemented for open boundary truncation. Unlike the standard PML´s, the proposed absorbing boundary conditions (ABC´s) do not require introduction of additional variables.