Discussion of moment method codes with emphasis on aperture coupling

Four numerical codes treating coupling through apertures to wires or other objects are discussed. The codes are time harmonic codes utilizing either an electric field integral equation or a reaction integral equation formulation. The four codes examined are: (1) a triangular patch moment method code; (2) a rectangular patch code; (3) a body of revolution moment method code; and (4) a hybrid code which uses both a moment method technique and a finite difference technique. Each code is examined with respect to the geometry of the scatterers for which it can be used.