The self impedance of a waveguide-fed transverse broad wall slot radiating between baffles

An analysis of the self impedance of a waveguide-fed transverse slot radiating between baffles is presented. The baffle structure is treated as a parallel plate (PP) waveguide of finite length which radiates into half space through an aperture in an infinite ground plane. The slot problem is analyzed using a set of integral equations which are solved numerically using the method of moments. The results can be used in previously published design procedures for waveguide-fed series slot arrays. Results of an experimental investigation of this radiating structure are also presented to illustrate the edge effects of the finite length of the cylindrical structure. A set of radiation patterns are presented to illustrate the suppression of grating lobes.