A Computationally Efficient Electromagnetic Wave Scattering Analysis Method for Electrically Large Multilayered Dielectric Structures

The paper presents a computationally efficient method based on the modified equivalent current approximation for electromagnetic wave scattering analysis of electrically large multilayered lossy dielectric structures. The proposed method can be an effective alternative to commercially available tools and methods, which tend to become computationally intensive with increase in size and losses of structures. The proposed method is applied to compute the radar cross-section(RCS) of various multilayered dielectric and coated perfect electric conductor (PEC) structures for both TE and TM polarization under normal and oblique incidences and compared with the method of moments (MoM) and finite element method (FEM). The result shows excellent agreement and reduced computational resources and time compared to both MoM and FEM. In comparison, the proposed method saves computational time by a factor of 15, and over 50% reduction in memory usage. The proposed method can be applied directly to study scattering problems involving electrically large multilayer dielectric and conducting structures.