Numerical diffraction coefficients for the conductor-backed dielectric half-plane

A method is presented for extracting the numerical diffraction coefficients for coated edges and material joints. Without resorting to an IBC approximation, an exact boundary integral formulation of the coated edge is used as the basis of numerical coefficient extraction. The semi-infinite problem is solved by taking into account the nondecaying physical optics and surface wave fields such that the final discretization domain involves only a finite region near the diffraction center. Numerical diffraction coefficients are extracted and then employed within a uniform theory of diffraction framework to construct solutions to finite-sized coated structures. Agreement between the solution and an exact moment method solution for the finite coated structures suggests that this method is a viable approach to the detailed study of the complex scattering physics occurring in coated structures.<>