A novel dual-polarized horn antenna

The invention discloses a novel dual-polarized horn antenna, which comprises a rectangular horn radiation cavity, a coupling slot, a coupling radiation cavity, a waveguide matching section, an orthogonal mode coupler and a rectangular waveguide coaxial conversion joint. The broadside and narrow side of the rectangular horn radiation cavity can be taper according to the E and H plane patterns polarized along the narrow side. The coupling slot is symmetrically distributed on the narrow side wall of the rectangular horn, and the long side of the slot is parallel to the narrow side direction of the horn. A group of symmetrical coupling radiation cavities are connected with the rectangular horn radiation cavities through coupling slots. The waveguide matching section is connected with the lowerend of the rectangular horn radiating cavity to realize the transition from rectangular port to square port and to improve the impedance matching performance of the dual-polarized horn. The dual-polarized common port of the