Numerical solution of scattering from metallo-dielectric composites via the CBFM applied in conjunction with the dipole moment approach (DMA)

While the formulation of integral equations via the use of Green´s functions is a well-established technique, it has been recognized that this formulation suffers from certain deficiencies. Some of these include low-frequency breakdown; need for special treatment of singularities of the ii-field representation in terms of the Green´s function; lack of a universal formulation for handling perfect electric conductor and dielectric structures; and, difficulty with accurate treatment of fine features such as thin wires and surfaces, especially those with finite losses. The paper begins by introducing the dipole-moment (DM) approach, and its application to the solution of the scattering from dielectric-coated structures. The characteristic basis function method (CBFM) was applied over the DMA to accelerate the solution.