| 摘要: |
| TR组件有源通道会随环境条件的变化引起雷达回波幅度和相位的变化，使得相控阵天线波束的指向精度下降、副瓣电平抬高，导致雷达系统在探测、成像、跟踪时失效。为此，通过对相控阵天线产生幅相误差原因的分析，提出了采用远场最优方向图和近场平均矢量法相结合的算法，对相控阵雷达进行非实时在线幅相校正，从而提高相控阵天线的幅相一致性，保证雷达系统正常工作。暗室试验和外场试验验证了算法的正确性和可实现性。 |
| 关键词: 相控阵雷达 幅相校正 最优方向图 平均矢量法 |
| DOI： |
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| 基金项目: |
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| Online gain and phase calibration for phased array radar |
| JI Bin,YANG Yong |
| () |
| Abstract: |
| Because the radar echo′s amplitude and phase will be changed when the temperature of TR module channel rises,the phased array antenna beam pointing accuracy will descend and side-lobe level will drive up,resulting in the failure when the radar system begins to detect,imaging and track.Through analyzing the reason causing amplitude-phase error,this paper introduces an algorithm which combines far-field measurement method of optimized radiation pattern with near-field measurement method of average vector algorithm to calibrate the radar non-realtimely and improve the phased array antenna′s amplitude-phase consistency. The correction and feasibility of this algorithm have been proved by the measurement in anechoic chamber and outfield test. |
| Key words: phased array radar gain and phase calibration optimized radiation pattern average vector algorithm |
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