Weighted DDM Enhanced by Fast Algorithm for Scattering from Large Metallic Targets

In this paper, A weighted Domain Decomposition Method (Weighted DDM) enhanced by the hybrid fast algorithm, i.e. the multilevel accelerated Cartesian expansion-multilevel fast multipole algorithm (MLACE-MLFMA), is adopted to analyze the electromagnetic scattering from large metallic targets. In the computational scheme, the surface integral equation (SIE) is adopted and the MLACE-MLFMA is utilized to accelerate the matrix-vector multiplications (MVMs). Compared with the unenhanced weighted DDM, the computational efficiency has been largely improved which can be demonstrated by the numerical results.