小屏蔽体屏蔽效能混响室测试的改进方法  

Improved Method on Shielding Effectiveness Test of Small Dimension Enclosures Using Reverberation Chamber

作　　者：曲兆明[1] 王庆国[1] 程二威[1] 

机构地区：[1]军械工程学院静电与电磁防护研究所,河北石家庄050003

出　　处：《军械工程学院学报》2010年第1期31-34,共4页Journal of Ordnance Engineering College

基　　金：基金项目：国家自然科学基金项目（60671045）

摘　　要：给出国军标（G JB）混响室条件下小屏蔽体屏蔽效能的测试方法并分析其存在的不足,提出基于统计意义和多点数据采集的屏蔽效能定义及屏蔽效能计算公式,成功设计和开发基于统计意义的混响室屏蔽效能测试系统。该系统包含信号发生器、功率放大器、屏蔽壳体、场强计、运动导轨、步进电机、控制计算机及测试软件并能够自动进行数据采集和处理,并允许在腔体的谐振频率下进行测试且能够获得屏蔽效能的均值。实验验证了该系统相比G JB混响室测试方法具有更好的重复性,能够作为小屏蔽体屏蔽效能测试的一种标准方法。The test method on shielding effectiveness （SE） of small dimension enclosures using reverberation chamber in GJB is presented and its shortages are analyzed. A new definition of SE and its formula based on the statistic meaning and multi-points measurement has been put forward. A new testing system based on the statistic definition and multi-points measurements of SE has been successfully designed and developed. This system includes signal generator, power amplifier, shielding enclosure, field meter, motion track, step motor, control computer and software. It can be operated automatically with data acquisition and treatment. This new system allows the tests at resonant frequencies of the enclosure and it can produce average values of SE tests. Experiments show that this new system has better repeatability compared to the method in GJB. It can be applied as one of standard methods for SE measurements of small enclosure in reverberation chamber.

关 键 词：小屏蔽体 屏蔽效能 混响室 

分 类 号：O441[理学—电磁学]