High-gain low sidelobe E-plane sectorial horn antenna

The invention discloses a high-gain low sidelobe E-plane sectorial horn antenna, which is characterized in that: the high-gain low sidelobe E-plane sectorial horn antenna is composed of a rectangular waveguide section, an opening angle connecting section, a throat transition section and a sectorial horn section, wherein one end of the rectangular waveguide section serves as a feeding port, adopts a dominant mode TE 10 mode for feeding, and the other end expands outwards to form a connecting section between a feeding waveguide and a horn throat; the tail end of the connecting section are bent inwards third times and bent outwards twice to form the throat transition section protruding backwards; and a wide edge of the tail end of the transition section expands outwards to form the sectorial horn section, and a row of rectangular racks which are vertical to the inwalls, evenly spaced and parallel to one another are placed on the inwalls at both sides of the wide edge of the horn section and extend to the horn mouth. The high-gain low sidelobe E-plane sectorial horn antenna achieves the broadband, high gain, low sidelobe, high front-to-rear ratio, high efficiency and size reduction of the E-plane sectorial horn antenna, has the advantages of novel idea, clear principle, universal method, simple structure, easy processing and the like, and has good reference significance for optimization design of a directional diagram of an H-plane sectorial horn antenna.