Electromagnetic Compatibility Testing Studies
Electromagnetic Compatibility Testing Studies
复制标题
电磁兼容性测试研究
DOI：
--
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
A. Mitra
中科院分区：
文献类型：
--
作者：
T. Trost;A. Mitra
这份报告讨论了德克萨斯理工大学对微波混响(模式搅拌)室进行的一项研究的分析模型以及统计特性的测量和模拟结果。在我们的腔体中，对天线到天线和天线到D点传感器的功率传输与频率关系的两个解析模型进行了实验验证。给出了测量和计算Q室的两个例子，每个模型一个。电磁功率密度的测量验证了在腔壁上和远离腔壁的理论概率分布，并在低于理论有效范围的频率处得到了具有较大标准偏差的分布。对两个点的电磁功率密度的测量验证了腔壁上的理论空间关联函数，并在低于理论有效范围的频率处产生了具有更大关联长度R(Subcorr)的关联函数。采用带移动壁的矩形腔体进行了数值模拟，结果与测量结果吻合较好。理论空间相关函数在我们室内有效的最低频率的确定大大高于在EMC测试中使用混响室的当前指南所推荐的最低频率。对今后与EMC测试相关的研究提出了两点建议。
This report discusses the results on analytical models and measurement and simulation of statistical properties from a study of microwave reverberation (mode-stirred) chambers performed at Texas Tech University. Two analytical models of power transfer vs. frequency in a chamber, one for antenna-to-antenna transfer and the other for antenna to D-dot sensor, were experimentally validated in our chamber. Two examples are presented of the measurement and calculation of chamber Q, one for each of the models. Measurements of EM power density validate a theoretical probability distribution on and away from the chamber walls and also yield a distribution with larger standard deviation at frequencies below the range of validity of the theory. Measurements of EM power density at pairs of points which validate a theoretical spatial correlation function on the chamber walls and also yield a correlation function with larger correlation length, R(sub corr), at frequencies below the range of validity of the theory. A numerical simulation, employing a rectangular cavity with a moving wall shows agreement with the measurements. The determination that the lowest frequency at which the theoretical spatial correlation function is valid in our chamber is considerably higher than the lowest frequency recommended by current guidelines for utilizing reverberation chambers in EMC testing. Two suggestions have been made for future studies related to EMC testing.