ANALYSIS OF A GRID DIPOLE ARRAY PLACED INSIDE A WAVE-GUIDE CAVITY WITH A RECTANGULAR COUPLING APERTURE

The circuit and coupling properties of a dipole grid array placed insi de a rectangular cross-section waveguide are analysed when also a rect angular aperture is used to couple the resonator energy into a semi-in finite waveguide. A Green function approach is employed to determine t he current distribution on the dipole elements by solving an integral equation and taking into account the boundary conditions on the rectan gular cavity walls. Both mutual and self-impedance terms are calculate d for the dipole grid array, and the effects of the rectangular coupli ng aperture are also examined.