基于互耦测试的相控阵天线系统校准研究

Calibration of Phased-Array Antenna System Based on Mutual Coupling Test

本文针对大型相控阵天线系统需要维护和不定期校准的问题,基于相控阵天线振子之间的互耦特性设计了一种通用的校准方法。相对于互耦校准法,文章解决了天线阵面的异形结构和介电常数的不一致性引起的校准偏差,具有更好的通用性;相对于其他方法不需要增加硬件适配,具有更简单的系统复杂度和更好的成本优势。文章通过理论分析和数学推导为该方法提供了支撑,并经过多阵面,多频点验证了该方法的有效性。该方法适用于大多数均匀直线相控阵天线系统,并可推广到平面阵列。

In this paper,a universal calibration method is designed based on the mutual coupling between the oscillators of the phased-array antenna. Compared with the method of mutual coupling calibration,this paper solves the calibration bias caused by the heterostructure of antenna array and the inconsistency of dielectric constant,which is more universal. Compared with other methods,hardware adaptation does not need to be increased,which has simpler system complexity and better cost advantage. The method is supported by theoretical analysis and mathematical derivation,and the validity of the method is verified by multi-array and multi-frequency points. This method is applicable to most of the uniform linear phased array antenna systems and can be extended to planar arrays.