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Application of Total-Field/Scattered-Field Technique to 3D-MRTD Scattering Scheme

A total-field/scattered-field (TF/SF) technique is developed to introduce an incident plane wave in three-dimensional multiresolution time-domain (3D-MRTD) scattering scheme. Daubechies' compactly supported wavelet with two vanishing wavelet moments is used as spatial basis function to expand the field components in the MRTD scheme, and Yee's leap-frog approach is applied. To verify the feasibility of this method, the numerical experiments on a dielectric sphere illuminated by a time-harmonic plane wave and a conducting sphere illuminated by a transient plane wave are implemented, and the radar cross section (RCS) of the two sphere and near fields of the conducting sphere are presented. The results show that this method is very feasible and the MRTD computed results agree well with those of the analytical Mie-series solution.