High-integration-level integrated efficient sum-difference beam waveguide antenna

Abstract

The invention discloses a high-integration-level integrated efficient sum-difference beam waveguide antenna which comprises an ultra-low sidelobe waveguide traveling wave antenna array, a coaxial waveguide converter, a waveguide phase-shifting network structure, a waveguide power divider and a waveguide sum-difference beam network structure. The ultra-low sidelobe waveguide traveling wave antennaarray, the coaxial waveguide converter, the waveguide phase-shifting network structure, the waveguide power divider and the waveguide and difference beam network structure are combined sum-installed through cooperation of a metal framework, positioning pins and fastening screws. The beneficial effects are that the antenna employs an integrated technology, structural members are processed on one metal member in a centralized manner, the processing flow is reduced, the processing difficulty of the antenna is reduced, the weight of an antenna system is effectively reduced, the work efficiency ofthe antenna is improved, a particle swarm optimization algorithm is employed, and electromagnetic simulation and numerical calculation software are iteratively used, the special-shaped low sidelobe waveguide line source can be rapidly and effectively obtained, and the anti-interference capability of a portable radar system during low-speed small target reconnaissance is improved.

Description

technical field [0001] The invention relates to the technical field of waveguide antenna arrays, in particular to a highly integrated high-efficiency and differential beam waveguide antenna. Background technique [0002] The detection and tracking of low, slow and small targets has always been a difficult problem in the field of security. For example, in recent years, various consumer-grade small UAVs have become increasingly popular. Because of their low price and simple operation, they are easy to be manipulated by criminals. posed serious challenges. Another typical example is bird strikes in aviation. According to statistics, there are more than 500 bird strikes in my country in a year, and the economic loss exceeds 50 million yuan; the annual loss caused by birds in North America to aviation flights reaches billions, and the average number of bird strikes per 10,000 take-offs and landings in Europe reaches 5.7 times. The International Aviation Federation has now clas...

AI Technical Summary

Problems solved by technology

[0006] 1. The efficiency of the antenna is not high, and the side lobe is not low enough, which affects the detection effect: the RCS of pedestrians is about 0.5 square meters, while the RCS of typical low-slow and small targets is about 0.01 square meters

To effectively detect and track such a small target, the antenna, as the core component of the radar, must have high working efficiency and low sidelobes, otherwise the power consumption of the system will be high, and the anti-interference ability is not ideal. For example, the efficiency of the JY17A radar antenna feed system is lower than 40%, and the efficiency of the Blight B-400 radar is lower than 50%, and the sidelobe of this type of radar is about -20dB, which is difficult to meet the anti-jamming requirements of low-slow and small-target detection;

[0007] 2. The antenna elevation does not have the function of measuring height: the current typical low, slow and small target detection radar antennas, such as JY17A radar, Blight B-400 radar, PPS-5D radar, SQUIRE radar, Lyra10 radar, etc., mostly use a single The fan beam working mode can only measure the distance and azimuth coordinate information of the target, and does not have the height measurement function; if the target is to be positioned in three dimensions, it must have the height measurement function

Usually, in order to realize the sum and difference beam measurement, a sum and difference beam network composed of multiple modules is required, which has the disadvantages of large insertion loss, high cost and complex system

[0008] 3. The antenna module itself has a fixed beam and a single function, making it difficult to realize two-dimensional scanning;

However, the current common low, slow, and small target radar antenna modules have a single beam scanning function, and it is difficult to achieve two-dimensional scanning

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