MULTIDOMAIN PSEUDOSPECTRAL TIME-DOMAIN METHOD FOR COMPUTATION OF ELECTROMAGNETIC SCATTERING BY BODIES OF REVOLUTION

摘要

We present a multidomain pseudospectral method using cylindrical and spherical coordinates for the accurate and efficient time-domain computation of scattering by bodies of revolution (BOR) In the BOR formulation of Maxwell's equations, the Fourier collocation method is utilized in the azimuthal direction and the Chebyshev collocation method in the other directions. Using the complex-coordinate-stretching approach, the strongly well-posed perfectly matched layer (PML) formulations are derived in cylindrical and spherical coordinates. A comparison of the results obtained using the multidomain pseudospectral method and those using the finite-difference time-domain (FDTD) method clearly illustrates the superiority of the algorithm developed in this paper.