辐射电磁骚扰测量中归一化偏差分析  

Analysis on the Deviation of Normalized Radiated Disturbance Measurement Results

作　　者：唐承军[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院

出　　处：《安全与电磁兼容》2012年第6期57-59,共3页Safety & EMC

摘　　要：用3米法和10米法半电波暗室测量辐射电磁骚扰时,在180~260 MHz频段上应用20 dB/10倍的反比因子归一化测量结果存在一定的偏差。3米法半电波暗室归一化后的结果偏小,导致最终被测试设备在3米法半电波暗室测量会比在10米法半电波暗室测量时,更容易满足辐射电磁骚扰的限值要求。分析了归一化偏差产生的原因,并提出了加入辅助的修正系数修正测试结果的方法。By using the method of inverse proportionality factor of 20 dB per decade, the measurement results of radiated disturbance from 3 m test could be normalized to reconstruct data as measured by 10 m test method. However, this method could produce devia- tion in the frequency range of 180~260 MHz. Finally, the reason of deviation is analyzed, and the correction method is put forward.

关 键 词：偏差 辐射骚扰 反比因子 归一化 半电波暗室 CISPR22 

分 类 号：TN03[电子电信—物理电子学]