一种阵列天线阵元幅相、位置误差校正方法

A Calibration Method for Sensor Gain/Phase and Position Errors of Array Antenna

针对毫米波热辐射信号弱的问题,该文提出一种对存在阵元幅相、位置误差的线阵进行校正的方法。该文基于低信噪比(SNR)的阵列误差模型,利用单个校正源,其信源方向未精确已知,通过旋转天线阵列在多个校正方位测得校正数据,并估计出阵元幅相、位置误差参数,从而对阵列中的阵元幅相、位置误差进行联合校正。该方法运算复杂度低,具有较高的估计精度,校正性能良好。理论分析和计算机仿真结果表明了该文方法的有效性。

In view of the weakness of millimeter wave radiation signals＇ energy, a calibration method for linear array with the presence of sensor gain, phase and position errors is presented. Based on the array distortion model at low Signal-to Noise Ratio （SNR）, and through using a single signal source without knowing exact orientation, the calibration data in multiple angles is obtained by rotating the array antenna, and sensor gain, phase and position error parameters are estimated, thus accomplishing the joint calibration of gain, phase and position errors. The proposed method offers a less complex computation process with higher precision of estimation and good calibration performance. The theoretical analysis and computer simulation results show the effectiveness of the method.