An Efficient Method for Analyzing Electromagnetic Scattering of Complex Targets Coated With Anisotropic Metal Composites

In this letter, an efficient method is proposed for analyzing electromagnetic scattering from complex targets coated with anisotropic metal composites. The method discretizes electromagnetic scattering on the complex target's surface into a superposition of triangular surface element scattering. Initially, the plane wave spectrum expansion method derives the dual-spectral-domain integral representation of the scattering from triangular surface elements on the anisotropic metal composites coated slab model. Then, the saddle point evaluation is utilized to perform the asymptotic evaluation of the integral; the reflection coefficient can be obtained in the spatial domain. Finally, the equivalent electromagnetic current of the triangular surface elements is solved using the Stratton–Chu equation. Furthermore, the electromagnetic scattering of complex targets coated with anisotropic metal composites is obtained through the physical optics method. The numerical results, including radar cross section comparisons for typical slab, cube, and fighter models, demonstrate the accuracy and efficiency of the proposed method. The anisotropic metal composites can enhance the stealth capability of the fighter, which possesses excellent structural stealth performance.