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📄 抑制电缆干扰的制胜武器－滤波连接器.htm

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<p align=center style='text-align:center'><strong><span style='font-size:12.0pt;
letter-spacing:4.0pt'>抑制电缆干扰的制胜武器－滤波连接器</span></strong><span lang=EN-US><o:p></o:p></span></p>

<p><strong><span lang=EN-US style='font-size:10.0pt;letter-spacing:4.0pt'>1．电缆是系统的最薄弱环节</span></strong><span
lang=EN-US><o:p></o:p></span></p>

<p><span style='letter-spacing:4.0pt'>　　令许多产品开发人员不解的事情是：为什么两台独立进行电磁干扰测试时完全合格的设备通过电缆连接起来后，系统就不在合格了。这是忽略了电缆的辐射作用。实践表明，按照屏蔽设计规范设计的屏蔽机箱一般很容易达到<span
lang=EN-US>60-80dB的屏蔽效能，但往往由于电缆处置不当，造成系统产生严重的电磁兼容问题。90%的电磁兼容问题是由于电缆造成的。这是因为电缆是高效的电磁波接收天线和辐射天线。</span></span><span
lang=EN-US><o:p></o:p></span></p>

<p><span style='letter-spacing:4.0pt'>　　电缆产生的辐射尤其严重。电缆之所以会辐射电磁波，是因为电缆端口处有共模电压存在，电缆在这个共模电压的驱动下，如同一根单极天线，如图<span
lang=EN-US>1所示。</span></span><span lang=EN-US><o:p></o:p></span></p>

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