摘要
针对计算机电磁信息泄漏对信息安全的影响,结合屏幕分辨率为1 280×1 024的液晶显示屏的信号辐射情况,利用计算机进行了仿真,分析了辐射信号的时频特性,并对计算机进行了屏蔽设计与实测。测试结果表明,所设计电子屏蔽箱的辐射发射总体<35 dBμV/m,适当增加防护半径,其辐射发射量可降到20 dBμV/m以下,低于20 dBμV/m的环境噪声,达到防电磁泄漏的要求。
In view of the computer electromagnetic information leakage of information security implication,this [KG（-1x]paper analyses the time-frequency characteristics of radiation signal from LCD display with a resolution of 1 280×1 024 through simulation.The design and measurement of the shielding box is given.A USA military standard testing is made,which shows that the designed electronic shielding box is less than the overall emission of radiation 35 dBμV/m,and with a proper increase in protection radius,the amount of its radiation emission can be reduced to 20 dBμV/m or less,lower than the 20 dBμV/m of the ambient noise thus meeting the information security requirements.
出处
《电子科技》
2010年第8期50-52,共3页
Electronic Science and Technology
基金
陕西省自然科学基金资助项目(2010JM8041)
关键词
辐射信号时频分析
屏蔽箱设计
电磁兼容测试
radiation signal time-frequency analysis
shielding box design
electromagnetic compatibility testing
