摘要
本文在计算机信息防泄复合薄膜屏蔽材料研究中，引入材料设计的思想，运用传输线的理论模型，借助于计算机，对不同材料进行多层屏蔽设计。计算结果表明，非磁性导体间的多层复合，屏蔽效果随分层数的增加而趋于一极大值，但变化值很小；磁性导体的多层复合，屏蔽效果与分层数存在着最佳的匹配关系，并随频率、膜厚、成分变化而变化；金属与铁氧体的复合，仅当屏蔽衰减较大时（膜较厚），铁氧体对屏蔽才起明显作用，分层才有意义。
The concept of material design isintroduced into the study of computer informationcomposite multilayer shielding materials. Adoptingthe model of the transmission theory, the shieldingeffectiveness of different multilayer materials is calculated.The results show that in non-magneticconductivity multilayers,the shielding effectivenessincreases with the layer numbers,and reaches amaximum,but the changlng value is slight,while inmagnetic multilayers,the shielding effectiveness ismatched with layer numbers, and varies withfrequency, thickness and composition.In the systemof metal-ferrite multilayers, only when the shieldingeffectiveness gets large,the shielding contribution bylayer numbers becomes apparent.
出处
《功能材料》
EI
CAS
CSCD
1995年第6期541-544,548,共5页
Journal of Functional Materials
基金
国家自然科学基金
关键词
计算机信息防泄
屏蔽
电磁兼容性
computer information shielding,shielding,material design,multilayers
