单脉冲雷达幅相不一致校正方法研究

Research on the calibration method of amplitude and phase inconsistency in mono-pulse radar

为了消除单脉冲雷达和差信号幅相不一致所导致的测角系统误差,提高测量精度,提出了一种基于正交分解情况下,利用IQ分量进行校正的方法。首先从和差信号幅相关系推导测角误差公式,其次,提出了一种差信号补偿系数计算方法并对其有效性进行理论分析,最后在实际雷达系统中应用验证。实测结果表明,该方法在有效消除误差的同时,能够获得良好的测角精度。

To eliminate the systematic error on the measurement of angle causing by amplitude and phase inconsistency in mono-pulse radar and improve precision, a calibration method is put forward using IQ components based on orthogonal decomposition. Firstly, an angle measuring error formula is derived according to the relations of amplitudes and phases of the sum-difference signals. Then, an algorithm is designed to the compensation coefficient for difference signal and its effectiveness is analyzed theoretically. Finally, this method is applied and verified in an actual radar system. The results show that： the systematic error can be eliminated and a good precision is obtained by using this method.