摘要
相控阵天线的指向精度决定着雷达系统对目标的探测精度,甚至会影响跟踪、截获目标的成败。以一种地基相控阵天线为例,详细分析了机电混合扫描天线的指向系统性误差来源：1）热形变导致的单元间距误差,2）空气折射,3）伺服机械转动误差,4）天线内部温度场变化等。从理论上分析了上述因素对天线指向精度的影响,并提出了完整的远场误差校准方法和误差修正流程。试验结果表明,误差来源分析准确,所提出的校准方法可以明显改善天线指向精度,从而提高雷达系统跟踪精度和威力,对于地基乃至移动平台相控阵天线的设计与应用具有重要的参考价值。
The pointing accuracy of phased array antenna determinates the detection accuracy of radar system,and even effects the success or failure of tracking and intercepting target. Taking a kind of ground-based phased array antenna as an example,the sources of systematic pointing error in the electromechanical hybrid scanning antenna are detailed including1） the distance error between antenna units caused by thermal deformation,2） air refraction,3） mechanical error during azimuth rotating,4） temperature field distribution within the antenna. In this paper,the influence of the above factors on the antenna pointing accuracy is analyzed theoretically,and the complete remote field error calibration method and error correction process are proposed. The experiment results show that the error sources analysis is correct. And also,the proposed calibration method can greatly improve the antenna pointing accuracy. Thus,the tracking accuracy and the power of radar system are obvious improved. It has the important reference value for the design and application of ground-based and mobile-platform phased array antenna.
作者
张赟霞
任波
ZHANG Yun-xia1 , REN Bo1,2(1. The 14th Institute of CETC, Nanjing 210039, China ; 2. Science and Technology on Antenna and Microwave Laboratory, Nanjing 210039, Chin)
出处
《微波学报》
CSCD
北大核心
2018年第4期16-21,47,共7页
Journal of Microwaves
关键词
相控阵天线
指向精度
系统性误差
空气折射
温度场
phased array antenna
pointing accuracy
systematic error
air refraction
temperature field
作者简介
张赟霞 女，1981年生，高级工程师。主要研究方向：相控阵天线阵面系统。E—mail：820732010@qq．com;任波 男，1979年生，研究员级高工。主要研究方向：超宽带天线设计、固态有源相控阵天线设计、空馈相控阵天线设计等。E—mail：youkoa@163．com
