Abstract:

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.

Key words: transmission line, shielding effectiveness, cylindrical enclosure, higher-order mode, elatro magnetic pulse(EMP), circuit board