Description
磁场耦合:在任何载流导体周围都会产生磁场,当电流变化时会产生交变磁场,该磁场必然会在其周围的闭合回路中产生感应电势引起干扰,它是通过导体间互感耦合进来的。在设备内部,线圈或变压器的漏磁也会引起干扰;在设备外部,平行架设的两根导线也会产生干扰。电磁辐射会造成磁场耦合干扰,如高频电流流过导体时,在该导体周围便产生了向空间传播的电磁波。这些干扰极易通过电源线和长信号线耦合到计算机中。另外,长线干扰具有天线效应,即能够辐射干扰波和接受干扰波。
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