Analysis of Impedance of Feeding Offset Cross Slots in the Broad Wall of a Rectangular Waveguide

Offset cross slots are used in designing the feeding network of the slotted-waveguide array antenna. Using equivalent theory, method of moment and Galerkin function, and according to boundary conditions of electromagnetic fields, this paper establish the integral equation to ascertain electric field distribution on the slot aperture, and dissertates an improved method of computing the impedance of feeding offset cross slots in broad wall of a rectangular waveguide.