Electromagnetic Scattering From Coated Strips Utilizing the Adaptive Multiscale Moment Method - Abstract

Abstract

A novel numerical technique is presented for electromagnetic scattering analysis for coated flat strips. The computational formula is derived from a coupled system of electric- and magnetic-field integral equations and solved using an adaptive multiscale moment method. In this method, the unknowns are expanded in terms of local-supported triangular functions on different scales which are similar to wavelet-like basis functions. The procedure of solving the problem from a V -scale to a (V + 1) -scale has four steps. The first step is to predict the solutions on (V + 1) -scale from the known solution on a V -scale using interpolation. The second step is to eliminate the smaller coefficients of the basis functions of the solution and omit the corresponding rows and columns of the system matrix obtained from the moment method so as to reduce the size of the linear equations. The third step is to solve the matrix equation by the conjugate gradient (CG) method. The final step is to obtain the solution on the (V + 1) -scale by adding some zero-terms corresponding to the coefficient whose value is zero. Many numerical examples are presented. The results have shown that the novel numerical technique is an efficient, stable and adaptive algorithm.