Fast Computation for Solving Three-Dimensional Electromagnetic Wave Scattering

Many applications in electromagnetic engineering require the prediction of the current induced by a large range of incident plane waves. This paper presents an efficient and accurate method for calculating the angular response of electrically large targets. The proposed algorithm consists of three steps: use Fourier harmonics to interpolate the right hand side (RHS) within a given angle range; then reduce the number of independent coefficient vectors in Fourier harmonics by singular value decomposition (SVD); finally, effectively solve the matrix solutions of multiple RHSs with the recently proposed Krylov cycle method GCRO-DR. The numerical results are given and compared with other iterative algorithms to illustrate the effectiveness of the method.