线缆孔洞对车辆电子设备屏蔽效能分析

Shielding Effectiveness Analysis of Vehicle Electronic Equipment with Cable Holes

强电磁脉冲通过线缆孔洞耦合进入电子设备屏蔽腔,对作用范围内的电子产品会造成巨大的破坏效应。针对这一问题,采用传输线法分析各种线缆孔洞对电子设备腔体屏蔽效能的影响,并首次将其应用于某类型车辆中,为车辆内部电子系统的防护提供了理论参考。实验结果表明,在车辆不规则的腔体电磁脉冲情况未知的条件下,采用矩形屏蔽腔体圆形线缆孔洞可提高车辆电子设备的屏蔽效能。

High power electromagnetic pulse can couple into the cavity of electronic equipment through cable holes which will cause great damage to the electronic products. The shielding effectiveness of various electromagnetic products cavity with cable holes was analyzed by transmission line method. It will offer a theoretical reference to the electronic equipment of vehicles, and it is the first time to apply this theory to a type of vehicles. The experimental results show that rectangular cavity with round cable holes can improve the shielding effectiveness of electronic equipment in vehicles on the conditions of irregular cavities such as vehicles and unknown electromagnetic pulse.