Frequency-time Domain Shielding Effectiveness of Materials and Their Strong Electromagnetic Field Test  

作　　者：ZHANG Long WEI Guanghui FAN Lisi HU Xiaofeng ZHAO Yang ZHANG Yongqiang 

机构地区：[1]National Key Laboratory of Science and Technology on Electromagnetic Environment Effects, Mechanical Engineering College, Shijiazhuang 050003, China [2]Shijiazhuang Flying College of the PLA Air Force, Shijiazhuang 050081, China

出　　处：《高电压技术》2013年第10期2398-2402,共5页High Voltage Engineering

基　　金：Project supported by National Basic Research Program of China（973 Program） （6131380301） National Natural Science Foundation of China （61001050）.

摘　　要：To describe the shielding ability of materials accurately and comprehensively,the frequency-domain and time-domain shielding effectiveness(SE) of material is investigated.The relevance between them was analyzed based on the minimum phase method,and the time-domain SE can be derived from frequency-domain SE.The SE of an energy selective surface(ESS) made of a novel material is investigated,and the relationship between SE and radiation field intensity are analyzed.The results show that not only material,but also the intensity of radiation electric field shows influence on SE in its frequency; for some materials,the dependence of SE on radiation electric field intensity needs to be considered.Therefore,it is necessary to research on the SE of shielding material in high-intensity electromagnetic environment.To describe the shielding ability of materials accurately and comprehensively, the frequency-domain and time-domain shielding effectiveness （SE） of material is investigated. The relevance between them was analyzed based on the minimum phase method, and the time-domain SE can be derived from frequency-domain SE. The SE of an energy selective surface （ESS） made of a novel material is inves- tigated, and the relationship between SE and radiation field intensity are analyzed. The results show that not only material, but also the intensity of radiation electric field shows influence on SE in its fi＇equency; for some materials, the dependence of SE on radiation electric field intensity needs to be considered. Therefore, it is necessary to research on the SE of shielding material in high-intensity electromagnetic environment.

关 键 词：新型材料 屏蔽效能 磁场测试 时间域 频率 强电 电场强度 遮蔽能力 

分 类 号：TM153.5[电气工程—电工理论与新技术] TB39[一般工业技术—材料科学与工程]