基于多点接地的载荷舱电磁辐射抑制技术研究  

Suppression of the electromagnetic radiation in the payload module based on the multi-point grounding

作　　者：满明远 朱会强 侯建强[2] 黄程波[1] 董辉 MAN Mingyuan;ZHU Huiqiang;HOU Jianqiang;HUANG Chengbo;DONG Hui(China Academy of Space Technology,Xi'an 710071,China;School of Electronic Engineering,Xidian University,Xi'an 710071,China)

机构地区：[1]中国空间技术研究院西安分院,西安710100 [2]西安电子科技大学电子工程学院,西安710071

出　　处：《电波科学学报》2019年第4期505-511,共7页Chinese Journal of Radio Science

摘　　要：分别采用一种"多层快速多极子+多导体传输线理论"混合方法和实验方法,研究了多点接地技术对降低载荷舱内电缆电磁辐射的作用.首先,利用多导体传输线(multi-conductor transmission line,MTL)方法快速求解电缆区域泄漏电流;其次,将泄漏电流作为激励源,分谐振与非谐振两种状态,利用多层快速多极子方法准确、有效地对不同接地点数情况下载荷舱内电缆的电磁辐射进行仿真.实验结果和仿真结果证明了该混合方法的计算精度和高效性.最终得出结论:通过多点接地方式可以明显降低载荷舱内电缆非谐振状态下的电磁辐射,大大改善舱内复杂电磁环境,为航天电磁兼容工程设计提供理论指导.Utilizing a hybrid algorithm of"multilevel fast multipole algorithm(MLFMA)plus multi-conductor transmission line theory(MTL)"and its measurement method respectively,we study the suppression of the electromagnetic radiations of the cables in the payload module by using the multi-point grounding.MTL is employed to quickly calculate the leakage currents in the region of the cable,which could be used as the excited currents,and then MLFMA is used to accurately and efficiently simulate the radiations of the cables in the payload module corresponding to different grounding points in resonant and non-resonant respectively.The measured results and the simulated results verify the accuracy and the high efficiency of the hybrid algorithm.In conclusion,the radiations of the cables in non-resonant in the payload module can be reduced distinctively by using the multi-point grounding,in order to optimize the complex electromagnetic environment in the payload module.The research can provide theoretical guidance for the engineering design on the aerospace electromagnetic compatibility.

关 键 词：电磁兼容 电磁辐射 多导体传输线(MTL) 多层快速多极子 串扰 多点接地 

分 类 号：TN811[电子电信—信息与通信工程]