Generalized excitations and loads for electromagnetic analysis with boundary elements
Several new excitation and load models are proposed for electromagnetic analysis in the context of a Galerkin-type large-domain (higher-order) boundary element method (BEM) or Method of moments for structures composed of thin wires, metallic surfaces, and imperfect inhomogeneous dielectric bodies. The models represent a natural generalization of point-delta generators and loads for wires. They are used for excitation and loading of metallic quadrilateral surface elements and dielectric hexahedral volume elements, and are termed line-delta and surface-delta generators and loads, respectively. The corresponding Galerkin generalized impedance and voltage matrix elements are derived and incorporated in the large-domain BEM outlined in the paper. The accuracy and usefulness of the proposed excitation and load models are illustrated on a number of characteristic examples. It is believed that these models can also be included in other BEMs for analysis of electromagnetic systems in frequency domain with comparable advantages.
excitations loads electromagnetic analysis boundary elements moment method integral equations