Radiation from a waveguide-backed aperture in an infinite ground plane in the presence of a thin conducting plate

Coupled integrodifferential equations are formulated for the general problem of radiation from a waveguide-backed aperture in an infinite conducting plane when a thin, finite, and arbitrarily oriented conducting plate is located in its proximity. The general equations are particularized for the special case of a rectangular aperture and a rectangular plate and solved numerically using the method of moments. Detailed data are presented and discussed for various quantities of interest.