Multi-layer TDS approximation used to numerical solution for dielectric objects

In practical engineering applications, electromagnetic analysis of stratified dielectric objects, such as radomes, heat insulated material, etc is highly desirable. In this paper, as improvement of the full current TDS approximation, a multilayer TDS approximation method is proposed. This approximation leads to surface integral instead of the volume integral, and consequently reduce unknowns by only surface meshes being utilized to discretize the dielectric geometry. The TDS approximation and the normal continuity condition of D flux result in considerable saving in computing cost. The TDS approbation describes the volume polarization currents as multi-layer current sheets, each of which retains constant in the normal direction.