摘要
在进行电磁兼容现场测试时,从环境电磁信号中准确地提取出待测设备的电磁辐射信号是迫切需要解决的难点问题之一。基于空域对消的原理,本文使用新型的时域测量和接收体制,嵌入时域信号处理方法,在缺失环境电磁干扰源的数量和方位分布等先验信息的情况下,依然能够等效地创造出一个暗室环境,滤除测量现场的环境电磁干扰并获得待测设备的真实辐射特性。仿真和测试结果表明,该方法不仅能够抑制窄带和宽带稳态干扰,而且对瞬态干扰也有很好的抑制效果,此外多径干扰也能够得到有效抑制,为电磁兼容现场测试带来较好的可操作性和便利性。
In the on-site test of electromagnetic compatibility,it is one of the difficult problems that need to be solved urgently,accurately extracting the electromagnetic radiation signal of the equipment under test from the environmental electromagnetic signals.Based on the principle of spatial cancellation,a new type of time domain measurement and reception system is used.In the absence of prior information such as the number and orientation distribution of environmental electromagnetic interference sources,the method can still create a virtual microwave anechoic chamber environment,so as to filter the on-site environmental electromagnetic interference and obtain the real radiation characteristics of the equipment under test.Simulation and test results show that the method can not only suppress the narrow-band and broadband steady-state interference,but also has a good effect on transient interference.In addition,the multipath interference can be effectively suppressed,which brings better operability and convenience for electromagnetic compatibility on-site test.
作者
卢中昊
徐军
林铭团
LU Zhonghao;XU Jun;LIN Mingtuan(College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;Beijing Space Vehicle General Design Department, Beijing 100094, China)
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2020年第7期1433-1438,共6页
Systems Engineering and Electronics
基金
装备发展部“十三五”共用技术预先研究(41409050101)资助课题。
关键词
电磁兼容
辐射发射
现场测试
电磁干扰
electromagnetic compatibility(EMC)
radiation emission
on-site test
electromagnetic interferences(EMI)
