MULTIMODE NETWORK DESCRIPTION OF A PLANAR PERIODIC METAL-STRIP GRATING AT A DIELECTRIC INTERFACE .1. RIGOROUS NETWORK FORMULATIONS

The problem of a plane wave incident at an arbitrary angle on a metal strip grating of arbitrary period located at an air-dielectric interface is formulated rigorously in terms of a pair of static integral equations, from which equivalent multimode network descriptions are derived. Both aperture and obstacle approaches are treated, and both TE and TM polarizations are considered explicitly.