Active phased array radar calibration method

By exciting the radiating elements in single-channel mode and constructing a phase compensation lookup table, the complexity and real-time issues of active phased array radar calibration methods are solved, achieving efficient and flexible calibration and improving the stability and accuracy of the radar.

CN122017762APending Publication Date: 2026-05-12WUXI SINE TECH CO LTD
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Patent Information

Application Number
CN202610240404.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-28
Publication Date
2026-05-12

AI Technical Summary

Technical Problem

Existing calibration methods for active phased array radars require additional equipment, are complex and time-consuming to test, and are difficult to meet real-time calibration requirements. Furthermore, they ignore the effects of system drift over time and multipath reflection interference, resulting in insufficient calibration accuracy.

Method used

By sequentially exciting each radiating element in single-channel operating mode, acquiring coupled signals and constructing a phase compensation lookup table, and combining near-field or far-field probe signal acquisition, system drift and multipath interference are eliminated, enabling rapid and flexible calibration.

Benefits of technology

It reduces the cost of the calibration system, simplifies the process, improves the real-time performance and accuracy of calibration, meets the calibration requirements in dynamic scenarios, and enhances the stability and performance of the radar.

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Abstract

The invention relates to the field of phased radars, and discloses an active phased array radar calibration method, which is used for improving the accuracy of actually measured phase data. Comprising the following steps: calculating theoretical excitation phases of radiation units according to an antenna array physical geometric structure and a target beam directional angle; enabling the antenna to sequentially excite the radiation units and collect coupling signals in a single-channel mode, and performing analysis to obtain an actually measured amplitude, a phase and a phase deviation; synthesizing the theoretical excitation phase and the phase deviation to generate an actual emission phase, and constructing a phase compensation lookup table; and after compensation by using the lookup table, measuring the actual directional diagram, and if not, performing fine adjustment. The calibration precision and reliability are improved, and the high-precision detection requirement of the active phased array radar can be met.
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