Domain Decomposition WLP-FDTD for Efficient Electromagnetic Scattering Analysis

An efficient domain decomposition (DD) finite-difference time-domain (FDTD) mehod based on weighted Laguerre polynomials (WLP) is proposed for analyzing the electromagnetic scattering problems. In order to calculate the radar cross section of two-dimensional structures, the total-field-scattered-field boundary is employed. The split-field perfectly matched layer absorbing boundary condition is derived for truncating the computational domain. In DD-WLP-FDTD, the reverse Cuthill-Mckee scheme for the lower-upper decomposition is applied to the subdomain matrices individually to further improve the efficiency. Multiscale numerical examples verify the accuracy and efficiency of the proposed method.