摘要
针对高空核电磁脉冲(highaltitude electromagnetic pulse,HEMP)试验研究,分析了电小环天线测量原理和频率特性,建立了传感器数值模型,研究了其脉冲接收特性,设计了一种B-dot传感器,研制了一套脉冲磁场测量系统.结果表明:当环面半径小于20mm,传感器的上限截止频率达到720MHz以上,标定结果显示测量系统整机的上升时间小于1ns.应用该系统测试HEMP模拟器的电磁脉冲环境,并与电场测量结果进行了比对和验证,结果与理论相符,该系统具备HEMP模拟器产生的快前沿脉冲磁场的测量能力,同时可推广应用于其他强脉冲磁场测量.
For the high altitude electromagnetic pulse testing research purpose, the measuring principle and frequency characteristic of electrically small loops are analyzed in this paper. A numerical model of electrically small loop is founded, and the pulse receiving characteristics are obtained by simulation. Then, the B-dot sensor is designed, and a pulsed magnetic field measuring system is constructed. The results show that the sensor's upper cut-off frequency exceeds 720 MHz when the ring radius is less than 20 mm, and the system calibrated risetime is less than 1 ns. The measuring system is used to measure the magnetic field generated by a HEMP simulator. It shows that the system can measure pulsed magnetic field with fast risetime, and it can also be applied to measure other pulsed magnetic field with high magnitude.
作者
王伟
朱志臻
聂鑫
杨静
石跃武
王锦锦
WANG Wei;ZHU Zhizhen;NIE Xin;YANG Jing;SHI Yuewu;WANG Jinjin(State Key Laboratory of Intense Pulsed Radiation Simulation and Effect ,Xi'an 710024, China;Northzvest Institute of Nuclear Technology ,Xifan 710024, China)
出处
《电波科学学报》
EI
CSCD
北大核心
2019年第3期347-354,共8页
Chinese Journal of Radio Science
基金
国家重点实验室自主基础研究课题(SKLIPR1406Z)
关键词
高空核电磁脉冲
磁场
测量技术
电小环天线
快前沿
high altitude electromagnetic pulse(HEMP)
magnetic field
measurement technology
electrically small loop
fast risetime
