Bipolarization waveguide slot array antenna

Abstract

The invention provides a bipolarization waveguide slot array antenna. The bipolarization waveguide slot array antenna comprises a horizontal polarization antenna module and a vertical polarization antenna module, wherein the horizontal polarization antenna module comprises a first waveguide coaxial converter and a horizontal polarization waveguide slot array; the first waveguide coaxial convertercomprises a first rectangular waveguide and a first feeding unit; the rectangular waveguide is provided with a plurality of first slots; the vertical polarization antenna module comprises a second waveguide coaxial converter and a vertical polarization waveguide slot array; a first single ridge waveguide and a fourth single ridge waveguide form a single ridge waveguide; the single ridge waveguideis provided with a plurality of second slots arranged in the extending direction and a plurality of second steps; the first slots are perpendicular to the second slots; the horizontal polarization antenna module is arranged on one side of the vertical polarization antenna module; two antenna modules are detachably connected. By optimizing the structure of the waveguide and adopting a proper feeding mode, a bipolarization phased-array antenna with characteristics of low cross polarization, high grain and low sidelobe radial as well as low profile structure is realized.

Description

technical field [0001] The invention belongs to the field of microwave technology, in particular to a dual-polarized waveguide slot array antenna. Background technique [0002] Phased array antennas are a product of the development of radar systems. The early radar system obtained a larger scanning area through mechanical rotation, while the phased array antenna changed the beam pointing of the pattern by electronically controlling the phase of the array elements, thereby covering a larger scanning area. Applying it to the radar system can greatly increase the scanning speed of the system, and provide timely information for guidance, detection, search, identification, capture and tracking, which plays a vital role in the development of the radar system. The application fields of phased array antennas are mostly reflected in the field of national defense and military affairs, including ground early warning phased array radars, air defense missile systems, etc., as well as fi...

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Problems solved by technology

[0004] The feeding method of the dual-polarized microstrip antenna array in the prior art determines that the antenna cannot be expanded into a large array with more array elements. To achieve broadband applications, this type of antenna usually needs to have two or more layers Radiation patch, there needs to be an air layer between the radiation patch layers, this method makes its implementation more difficult and the cost of actual installation and maintenance

Moreover, the antennas in the prior art still have many problems such as high profile, large antenna volume, and low overall performance.

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