A Phase-Correlation-Free and Difference Angle Measurement Method Based on Two-Dimensional Interpolation Phase-Phase Joint Compensation Phased Array

By using a two-dimensional interpolation amplitude-phase joint compensation phased array method, the problems of phase calibration complexity and insufficient angle measurement accuracy of conformal phased array antennas are solved, achieving high-precision and continuous angle measurement tracking, simplifying the phase calibration process and improving the robustness of the system.

CN122672027APending Publication Date: 2026-09-01THE 54TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
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Patent Information

Application Number
CN202611179473.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-08-05
Publication Date
2026-09-01

AI Technical Summary

Technical Problem

The beam pointing and phase correction process of conformal phased array antennas is complex and time-consuming, and the angle measurement accuracy and continuity are insufficient, leading to frequent tracking loss phenomena.

Method used

A two-dimensional interpolation phase-amplitude joint compensation phased array method is adopted. By constructing a sum-difference beam simulation model, a two-dimensional uniform grid is divided into azimuth and elevation, the zero value of phase correction and the amplitude correction factor are calculated and stored, and a two-dimensional bilinear interpolation algorithm is used to realize continuous phase correction and amplitude compensation, forming a closed-loop iterative tracking.

Benefits of technology

It achieves high-precision angle measurement without phase calibration using conformal phased arrays, improves the continuity of angle measurement and tracking stability, simplifies the phase calibration process, and reduces costs.

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Abstract

This invention proposes a phase-and-difference angle measurement method for phased arrays based on two-dimensional interpolation amplitude-phase joint compensation, belonging to the field of phased array data processing. The invention proposes offline construction of an azimuth-elevation two-dimensional grid, pre-storing the zero-values ​​of phase correction for each direction and the sum-and-difference amplitude correction factors. During real-time tracking, two-dimensional bilinear interpolation is used to calculate the zero-values ​​of phase and amplitude compensation coefficients for any continuous direction, simultaneously completing differential beam amplitude inconsistency compensation, NCO phase initial phase configuration, down-conversion low-pass filtering to calculate the angle error voltage, and then solving the angle deviation and updating the beam pointing in a closed loop. This achieves continuous phase-and-difference angle measurement within the detection range, suppresses conformal array wide-angle amplitude distortion and channel amplitude-phase imbalance, improves angle measurement accuracy and tracking stability, and is applicable to various conformal phased array radar measurement and control scenarios.
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