关键词: 终端系统, 雷电浪涌, 电源, 压敏电阻

Abstract:

The terminal system is an important component of the radar.Some of its external interface circuits will be damaged by lightning surge,which will prevent the system from normal work.In order to avoid the loss caused by lightning surge for the terminal system,the article introduces the surge protection and sound proof devices that are designed by methods including power supply,ground sound proof,relay insulation blocking,piezoresistor,voltage suppressing diode,signal optoelectronic isolation etc.These surge protection and sound proof devices suppress the lightning surge efficiently and protect the external interface circuits of the terminal system.The validity of surge protection device is verified through engineering tests.

Key words: radar terminal;lightning surge;power supply;piezoresistor