eLoran全向磁天线的研制  

Development of eLoran omnidirectional magnetic

作　　者：朱靖川 刘军良[1] 王莹 徐超[1] 胡永辉[1] ZHU Jing-chuan;LIU Jun-liang;WANGYing;XU Chao;HU Yong-hui(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院大学,北京100049

出　　处：《时间频率学报》2023年第1期60-70,共11页Journal of Time and Frequency

基　　金：中国科学院国家授时中心“青年创新人才”资助项目(NTSC青创201901)。

摘　　要：随着卫星导航授时的广泛应用,星基系统本身脆弱易干扰的缺陷也随之放大,在抗干扰方面更为安全可靠的增强型罗兰(enhanced Loran,eLoran)系统成为当前对卫星导航授时备份和增强的主要手段。接收天线是罗兰接收机的重要组成部分,磁天线在罗兰系统的现代化改进中作用显著,相较于电天线,磁天线具有对沉积静电干扰不敏感、便于小型化等优势。基于此,文中设计和实现了一种eLoran十字形双回路全向磁天线。通过FEKO的仿真分析结果可知,该天线的远场方向图符合预期。最后,对研制的实物分别进行近场测试和远场测试。实测结果表明,研制的eLoran十字形双回路全向磁天线能够接收全向长波信号,90~110 kHz频率范围的平坦度≤1.35 dB,3 dB带宽在32~38 kHz之间。With the widespread application of satellite navigation and timing,the vulnerability of the satellite-based system is also amplified.The enhanced Loran(eLoran)system,which is safer and more reliable in anti-jamming,has become the main backup and enhanced system for satellite navigation and timing.The receiving antenna is an important part of the Loran receiver.The magnetic antenna plays a significant role in the modernization and improvement of the Loran system.Compared with the electric antenna,the magnetic antenna has the advantages of insensitivity to the precipitation static interference and miniaturization.Based on this,an eLoran cross-shaped dual-loop omnidirectional magnetic antenna is designed and implemented in this paper.According to the simulation results of FEKO,the far-field pattern of the antenna is in line with expectations.Finally,the near-field test and the far-field test are carried out respectively.The actual measurement results show that the developed eLoran cross-shaped dual-loop omnidirectional magnetic antenna can receive omnidirectional long-wave signals,the flatness in the frequency range of 90~110 kHz is less than 1.35 dB,and the 3 dB bandwidth is from 32 to 38 kHz.

关 键 词：地基系统 eLoran 磁天线 

分 类 号：TN820[电子电信—信息与通信工程]