Sampling of stochastic electromagnetic fields
Sampling of stochastic electromagnetic fields
复制标题
随机电磁场采样
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
P. Russer
中科院分区：
文献类型：
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作者：
J. Russer;T. Asenov;P. Russer
随机电磁场可以通过空间中点对的电场和磁场值的自相关谱和互相关谱来描述。在这项工作中，讨论了通过对采样点对中的场值进行采样来表征噪声电磁场。对一组采样点的所有对中的电场或磁场值进行采样产生场样本的相关矩阵。如果对包含随机场源的参考表面中的近场进行采样并通过其相关矩阵来表征，则可以通过场相关谱来计算和描述参考表面外部空间中辐射的场。根据统计上独立的场源的数量，相关矩阵的特征值分解可产生测量的电磁噪声场的紧凑描述。
Stochastic electromagnetic fields can be described by the auto- and cross correlation spectra of the electric and magnetic field values at pairs of points in space. In this work the characterization of noisy electromagnetic fields by sampling the field values in pairs of sampling points is discussed. Sampling of the electric or magnetic field values in all pairs of a set of sampling points yields the correlation matrix of the field samples. If the near-field in a surface of reference enclosing the stochastic field sources is sampled and characterized by its correlation matrix the field radiated in the space outside the surface of reference can be calculated and described by the field correlation spectra. Depending on the number of statistically independent field sources the eigenvalue decomposition of the correlation matrix yields a compact description of the measured EM noise field.