机载卫通天线载波相位误差影响分析及补偿

Influence of Airborne Satellite Communication Antenna Carrier Phase Error and Compensation

针对和差通道相位误差对机载卫通天线跟踪误差的影响,在单脉冲跟踪接收机跟踪卫星工作原理的基础上,对和差通道2路载波相位误差产生的原因进行了简要介绍,对和差通道2路载波相位误差对天线跟踪性能的影响进行了分析,提出了采用标定法和移相法对载波相位的补偿方法,建立了和差通道相差修正模型。以某型机载卫通跟踪接收机为例,验证了通过调整接收机中频相位值来改善天线交叉耦合性能的有效性,结果表明,所提方法可有效减少天线交叉耦合和跟踪误差。

To solve the problem of the influence of sum-difference channel phase error on airborne satellite communication antenna tracking error,the causes of sum-difference channel’s two-carrier phase error are briefly introduced based on the working principles of the tracking satellite with mono pulse tracking receiver.The influence of two-carrier phase error of sum-difference channel on the antenna tracking performance is analyzed.The calibration method and the phase-shift method are put forward to compensate the carrier phase and the sum-difference channel difference correction model is established.An airborne satellite communication tracking receiver is taken as an example to verify that the antenna cross-coupling performance effectiveness can be improved by adjusting the receiver’s intermediate frequency phase value.The result shows that the proposed method can effectively reduce the antenna cross-coupling and tracking error.