Convolution quadrature methods for 3D EM wave scattering analysis

The time-domain boundary integral equations describing the electromagnetic wave scattering from arbitrary three-dimensional metallic structures are solved by applying spectral domain finite-difference approximations while mapping from the Laplace domain to the z-transform domain. The validity of the results are verified through comparison with high-resolution finite difference time domain method results and the convergence rate of the introduced time-marching schemes is compared with the time basis functions expansion methods.