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在开关电源中，由于近场干扰的影响，会在印刷电路板（ Ｐ Ｃ Ｂ） 布线之间造成电磁干扰（ Ｅ Ｍ Ｉ） 噪声。通过反馈变换器实验证实了这一影响的严重性。进一步的实验和现场测试证明，优化 Ｐ Ｃ Ｂ 布线可以有效地抑制电场干扰引起的 Ｅ Ｍ Ｉ。
In switching power supplies, electromagnetic interference (E M I) noise is caused between printed circuit board (PCB) wiring due to the effects of near-field interference. The impact of this effect was confirmed by feedback transducer experiments. Further experiments and field tests show that optimizing P C B wiring can effectively suppress E M I caused by electric field interference.