Advanced finite element analysis for EMC engineering

This paper presents a study of the Characteristic Basis Finite Element Method (CBFEM), which is an advanced numerical method that can be used in EMC applications. The CBFEM is a non-iterative domain decomposition technique employing characteristic basis functions, and it provides considerable reduction in matrix size and convenient parallelization, both of which make use of direct solvers in a memory- and time-efficient manner. The approach is compared with the conventional FEM in terms of both accuracy and the computational performance by means of various numerical simulations for solving waveguide and cavity problems having discontinuities and arbitrary objects inside.