Broadband miniaturized waveguide narrow-side slot antenna primary feed structure

The invention belongs to the technical field of microwaves, and particularly relates to a broadband miniaturized waveguide narrow-side slot antenna primary feed structure. The structure comprises: a combination path rectangular waveguide, a transition rectangular waveguide and branch rectangular waveguides. The combination path rectangular waveguide is an H-surface waveguide, the branch rectangular waveguides are an E-surface waveguides, and signal transmission with an equal amplitude and 180-degree output phase difference from the combination path to the branches is achieved through a sectionof transition rectangular waveguide and some metal bodies. The left metal body and the right metal body of the combination path rectangular waveguide are used for impedance matching between the combination path rectangular waveguide and the transition rectangular waveguide; the metal body under the combination path rectangular waveguide is used for widening the working frequency band of the wholefeed structure; the middl