弹载相控阵天线“最小二乘法——伪Hadamard矩阵”联合校准

doi:10.3969/j.issn.1001-506X.2020.02.03

摘要/Abstract

摘要：

为了更加精确地校准弹道导弹导引头的相控阵天线,弥补目前旋转矢量法校准弹载相控阵天线的缺陷,提出了“最小二乘法——伪Hadamard矩阵”联合校准方法。该方法利用最小二乘法拟合算法解决移相器只能提供离散相位变化,不能准确获得使天线合成功率最大时的移相器相位变化值的问题。通过构造伪Hadamard矩阵对天线分组,每一组移相器同时旋转多个阵元相位,使被测信号变化明显。远场校准实验表明,该方法能够对弹载相控阵天线起到非常好的校准效果。

关键词: 弹载相控阵天线, 伪Hadamard矩阵, 最小二乘法, 幅相校准

Abstract:

In order to calibrate the phased array antenna of the ballistic missile seeker more accurately and make up for the shortcomings of the current rotating vector missile-loaded phased array in calibrating, the least square method—artificial Hadamard matrix joint calibration method is proposed. This method uses the least square method to solve the problem that the phase shifter could only provide discrete phase changes and could not accurately obtain the phase change value of the phase shifter when the antenna composite is in the maximum power condition. The artificial Hadamard matrix is constructed to group the antennas, and each group of phase shifters rotates multiple phase elements at the same time, causing that the measured signal changes obviously.Far field calibration experiment shows that this method can achieve calibration results for the missile-loaded phased array antenna very well.

Key words: missile-loaded phased array antenna, artificial Hadamard matrix, least square method, amplitude and phase calibration

中图分类号:

TN821+.8

王迪, 王雪梅, 何岷, 张金昌, 王兴龙, 宿常鹏. 弹载相控阵天线“最小二乘法——伪Hadamard矩阵”联合校准[J]. 系统工程与电子技术, 2020, 42(2): 271-276.

Di WANG, Xuemei WANG, Min HE, Jinchang ZHANG, Xinglong WANG, Changpeng SU. Joint calibration of missile-loaded phased array antenna by least square method—artificial Hadamard matrix[J]. Systems Engineering and Electronics, 2020, 42(2): 271-276.

图/表 11

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Δ/(°)	0	δ	2δ	…	(M-1)δ
Q	Q₂	Q₁	Q₂	…	Q_M-1

算法	校准指标
算法	主瓣电平/dB	旁瓣电平/dB	指向偏差(和)/(°)	零深/dB
无	8.897	-12.4	-0.96	-11.37
REV	8.085	-15.68	-0.36	-11.38
LSAH	12.2	-19.66	0.098	-17.42

算法	校准时间/s
算法	和方向图	差方向图
REV	480	438
LSAH	718	688

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