Secondary radar with Mode S adaptive beam steering for each aircraft

By dynamically adjusting the effective beam width of the radar, the problems of high sector workload and low re-query rate in the prior art when moving targets close to or from a long distance are solved, and the effect of improving target detection efficiency and azimuth accuracy is achieved.

CN112305532BActive Publication Date: 2025-03-28THALES SA
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Patent Information

Application Number
CN202010744065.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2019-07-29
Filing Date
2020-07-29
Publication Date
2025-03-28
Estimated Expiration
2040-07-29

AI Technical Summary

Technical Problem

The existing S-mode adaptive beam-controlled secondary radar faces the problems of high sector workload and low re-question rate when dealing with moving targets at close or long distances, resulting in degradation of radar performance and low target detection efficiency.

Method used

By dynamically adjusting the effective beam width of the radar, the width of the interrogation and reply beam of each target is controlled according to the position of the moving window of the target and the antenna axis to reduce unnecessary selective interrogation and improve the azimuth accuracy of the target.

Benefits of technology

It realizes that the radar's target detection efficiency and azimuth accuracy are improved under high sector workload and low re-inquiry rate, and the time loss and target pollution of the radar are reduced.

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Abstract

The present application relates to a radar, which includes: an antenna having a radiation pattern forming a SUM channel, a radiation pattern forming a DIFF channel, and a pattern forming a CONT channel; a device for generating at least an inquiry message on the SUM channel and an ISLS inquiry message on the CONT channel; a device for transmitting these messages via the SUM channel and via the CONT channel, respectively; and a device for receiving and processing signals received via the SUM, DIFF, and CONT channels, configured to detect a target's reply to the signal received via the SUM and DIFF channels and perform single pulse processing and RSLS processing on these replies. The transmitting device is configured so that for each target, the width of the beam used to transmit the inquiry and receive the S-mode selective reply is controlled based on the moving window of the target and the position of the axis of the antenna in the window.
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