An effective broadband electromagnetic interference (EMI) source reconstruction method is proposed in this letter. An equivalent dipole model incorporating the global optimization method is developed to reconstruct EMI sources on printed circuit boards (PCBs) based on the scanned magnetic near-field magnitudes of device under test (DUT). Different to conventional approaches, the locations and quantity of the equivalent dipoles are fixed for all frequencies in the interesting band. The moments and locations of these dipoles are acquired by deploying interpolation based on near-field data at three predefined frequencies only. The near-field patterns at all frequencies can thus be obtained by customizing the dipoles moments. The values of the coupled powers derived from these models are used for near-field prediction. Through numerical and physical examples, the effectiveness of this broadband modeling method is verified.

中文翻译：

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基于无相磁近场扫描的宽带辐射源重建

这封信提出了一种有效的宽带电磁干扰 (EMI) 源重建方法。开发了一种包含全局优化方法的等效偶极子模型，以根据被测设备 (DUT) 的扫描磁近场幅度重建印刷电路板 (PCB) 上的 EMI 源。与传统方法不同，等效偶极子的位置和数量对于感兴趣频带中的所有频率都是固定的。这些偶极子的矩和位置是通过仅基于三个预定义频率的近场数据部署插值来获取的。因此可以通过定制偶极矩来获得所有频率的近场模式。从这些模型导出的耦合功率值用于近场预测。