A Combined Stencil-Adjustable Time-Domain/FETD Method for Electrically-Large EMC Structures

The consistent and cost-effective modeling of large-scale EMC structures, is presented in this paper via a novel parametric hybrid method. The proposed scheme blends a stencil-optimized time-domain algorithm in curvilinear coordinates and a modified finite-element time-domain approach to divide the problem into smaller flexible regions. Constructing a class of curvilinear 3-D operators, the framework assigns weights to each spatial increment and approximates spatial derivatives through interpolating polynomials. An important asset is that the two techniques are updated independently and interconnected by versatile boundary conditions. Numerical results from different realistic EMC setups verify our method and reveal its universal applicability.