A multi-beam vertical scanning method for airborne two-dimensional active phased array weather radar

By employing multi-beamforming and orthogonal projection methods with an airborne two-dimensional active phased array weather radar, the problem of traditional airborne weather radars being unable to effectively acquire vertical meteorological information has been solved, achieving efficient vertical scanning and meteorological information acquisition, and reducing the risk of accidents.

CN115685209BActive Publication Date: 2026-07-21LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
Filing Date
2022-10-19
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Traditional airborne weather radars use mechanically scanned antennas, which cannot simultaneously meet the requirements of antenna scanning frequency, azimuth resolution, and azimuth scanning range, and therefore cannot effectively acquire meteorological information in the vertical direction.

Method used

An airborne two-dimensional active phased array weather radar is used. The weight vector of the received beam is calculated by multi-beamforming and orthogonal projection to achieve vertical scanning. Vertical scanning is added during azimuth scanning to improve scanning efficiency.

Benefits of technology

Vertical scanning was achieved without compromising azimuth meteorological detection performance, improving pilots' ability to acquire meteorological information and reducing the accident rate.

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Abstract

The application provides a kind of airborne two-dimensional active phased array weather radar multi-beam vertical scanning method, comprising the following steps: step one, according to the target distance R covered by vertical scanning function requirement, height range ΔH, aircraft current height h and earth radius RE, the vertical scanning elevation range of weather radar is calculated, wherein Δθ is vertical scanning range;Step two, calculate the number of beams and beam position required to cover the vertical scanning elevation range;Step three, emit multi-beam forming;Step four, calculate the weight vector of receiving beam using orthogonal projection method, zero processing and null broadening processing are carried out in the direction of other beams for each beam;Step five, use the weight vector after null broadening processing to carry out receiving multi-beam forming;Step six, vertical scanning is carried out according to the number of beams and beam position in step two.Add vertical scanning, obtain vertical weather information without reducing azimuth weather detection performance.
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