Conformal low-sidelobe waveguide slotted array antenna

Abstract

The invention discloses a conformal low-sidelobe waveguide slotted array antenna. The antenna is characterized by comprising a radiation rectangular waveguide array, a feed rectangular waveguide and a coaxial feed unit; the wide side of the radiation rectangular waveguide array is vertical to the wide side of the feed rectangular waveguide; bias radiation slots are formed in the wide side of the radiation rectangular waveguide array in the top, and inclined coupling slots are formed in the wide side of the feed rectangular waveguide; and the end portion of the feed rectangular waveguide is provided with a coaxial feed interface. Feed includes two levels; in the first level, coaxial cables in the bottom feed the feed rectangular waveguide in the middle; and in the second level, the feed rectangular wave uses the inclined coupling slots thereof to feed the radiation rectangular waveguide array, and the bias radiation slots serve as an antenna radiation array plane to complete antenna radiation. According to index requirements for the anti-interference capability of antennas and sensitivity of micro signals, the antennas characterized by being easily conformal, low in sidelobe, high in gain, easy to design, compact in structure and the like are designed.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, in particular to a conformal low sidelobe waveguide slot array antenna. Background technique [0002] With the improvement of radar anti-jamming requirements and the development of pulse Doppler visible radar, the antenna should have the performance of low sidelobe or even extremely low sidelobe. Up to now, low sidelobe antenna is mainly divided into array antenna and reflector There are two types of antennas and some special antennas manufactured according to different applications. [0003] Microstrip patch array antenna is a typical array antenna. Because microstrip has the advantages of small size, light weight, thin profile, and easy processing, it has been widely studied and applied, but the microstrip antenna has a large loss, so the antenna gain is relatively low, and the influence of the dielectric substrate on the performance of the antenna Larger, there may be shortcomings suc...

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Problems solved by technology

For example, the hat-shaped self-supporting rotating corrugated feed, using this feed to feed the reflector can achieve a good low side lobe effect, but these feed systems are an important issue in the antenna design, between the antenna and the feed It is difficult to achieve a good balance between the matching of sources, the complexity of the structure and the accuracy of the feed network, and the problem of solving the problem of internal and external noise interference

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