GENERALIZED-METHOD OF MOMENTS FOR 3-DIMENSIONAL PENETRABLE SCATTERERS

We outline a generalized form of the method-of-moments technique. Inte gral equation formulations are developed for a diverse class of arbitr arily shaped three-dimensional scatterers. The scatterers may be total ly or partially penetrable. Specific cases examined are scatterers wit h surfaces that are perfectly conducting, dielectric, resistive, or ma gnetically conducting or that satisfy the Leontovich (impedance) bound ary condition. All the integral equation formulations are transformed into matrix equations expressed in terms of five general Galerkin (mat rix) operators. This allows a unified numerical solution procedure to be implemented for the foregoing hierarchy of scatterers. The operator s are general and apply to any arbitrarily shaped three-dimensional bo dy. The operator calculus of the generalized approach is independent o f geometry and basis or testing functions used in the method-of-moment s approach. Representative numerical results for a number of scatterin g geometries modeled by triangularly faceted surfaces are given to ill ustrate the efficacy and the versatility of the present approach.