Efficient computation of the time-domain scattering from bodies of revolution

An approach obtaining the time-domain scattering from metal, dielectric, or dielectric-coated bodies of revolution (BORs) is presented. The axial symmetry of the BORs enables a Fourier mode decomposition in the frequency domain, thereby allowing three-dimensional problems to be treated in two dimensions. By implementing the moment method and inverse discrete Fourier transform techniques, the proposed approach enables the time-domain analysis of more complicated objects, such as multiple metal scatterers and dielectric-coated scatterers. The effects of lossy and dispersive materials can be easily included in the time-domain analysis. Several examples are presented to illustrate the capabilities of the proposed approach.<>