有源相控阵天线的近场校准

为实现对相控阵天线的校准，降低幅相误差和阵元失效对天线性能的影响，提出了一种考虑互耦效应的近场校准方法。在利用近场扫描法完成逐一通道校准的基础上，使用旋转矢量法进行二次校准。在应用旋转矢量法（ REV)时，为使被测信号的变化明显，将大规模相控阵天线分为中间、边缘区域进行分区校准。通过二次校准可判定阵元是否失效，提高相控阵天线的幅相一致性；通过分区校准减小阵元间互耦的影响，缩短校准时间。仿真结果表明：此方法用于大型相控阵的校准具有较高的准确性，可改善校准结果。

Near-field calibration of active phased array antenna

In order to calibrate the phased array antenna and reduce the impact of element failure and am-plitude-phase errors,this paper proposes a calibration method which considers the mutual coupling. On the basis of the calibration with the near-field scanning method,the elements is calibrated by the rotating ele-ment electric-field vector( REV) method. With the REV method,the large-scale phased array antenna is distributed into some small areas such as middle areas and edge areas to make the signal vary more signifi-cantly . The re-calibration method can find out the failure elements and improve the phased array antenna's amplitude-phase consistency. The calibration of sub-region with the REV method can diminish the effect of the mutual coupling and shorten the calibration period. The simulations validate that the method has a good accuracy to calibrate the large-scale phased array antenna and can improve the calibration results.