Statistics of the Current Induced Within a Partially Shielded Enclosure in a Reverberation Chamber
Statistics of the Current Induced Within a Partially Shielded Enclosure in a Reverberation Chamber
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混响室内部分屏蔽外壳内感应电流的统计
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
C. Bunting
中科院分区：
文献类型：
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作者：
J. West;Rahul Bakore;C. Bunting
考虑了理想随机的机械搅拌混响室电磁场的孔径耦合在部分屏蔽的封闭空间内的导线和表面上感应的电流的统计特性。腔室场平面波频谱表示的稳健离散化证实，如果受试设备（EUT）完全由电磁线性材料组成，并且使用外部腔室场的机械或空间搅拌，则测试点处的感应电流幅度遵循瑞利分布，与EUT和耦合孔径的尺寸无关。离散频谱提供了一种有效的方法，可以在数值上找到任意形状EUT上或任意形状EUT内的电流统计数据。在机械搅拌混响室内对样本EUT上的感应电流进行实验测量，证实了预测低频和高频电流统计的离散平面波谱方法的有效性。频率搅拌的添加在混响室测试的操作中引入了根本差异，当考虑高度谐振的EUT时，其导致非瑞利样本统计。
The statistics of the current induced on conducting wires and surfaces within a partially shielded enclosure by aperture coupling of an ideally random, mechanically stirred reverberation chamber electromagnetic field has been considered. A robust discretization of the plane-wave spectral representation of the chamber field confirms that the magnitude of the induced current at a test point follows a Rayleigh distribution provided that the equipment under test (EUT) is composed entirely of electromagnetically linear materials and mechanical or spatial stirring of the external chamber field is used, independent of the sizes of the EUT and coupling aperture. The discrete spectrum gives an efficient method to numerically find the statistics of the currents on or within arbitrarily shaped EUTs. Experimental measurement of the induced currents on a sample EUT within a mechanically stirred reverberation chamber confirms the validity of the discrete-plane-wave spectral method of predicting the current statistics at low and high frequencies. Addition of frequency stirring introduces a fundamental difference in the operation of a reverberation chamber test that leads to non-Rayleigh sample statistics when highly resonant EUTs are considered.