A mesh-tearing sub-entire domain basis function method for improved electromagnetic analysis of strong-coupled cube array

A mesh-tearing sub-entire domain (MTSED) basis function method for improved electromagnetic (EM) scattering analysis of strong-coupled finite periodic structures is proposed in this paper. By tearing the coarse mesh of classic SED basis function into several smaller ones, the modeling precision for strong-coupled arrays can be improved more than 13dB maximally with less than four times computational time increasing compared to classic SED method. The mesh-tearing technique based on both simplified SED (MTSSED) basis function and accurate SED (MTASED) basis function are also investigated in detail. The detailed algorithm is presented and the numerical results demonstrate that the proposed MTSED method is an accurate method for electromagnetic scattering analysis of strong-coupled periodic structures.