CAJ | 학술논문

电磁干扰严重影响着密封终端技术性能的有效发挥，电磁屏蔽是提高电子系统和电子设备电磁兼容性能力的重要措施之一。简要介绍了典型通信终端的结构形式，分析了密封通信终端电磁屏蔽设计所面临的问题，指出了影响设备电磁屏蔽效能的泄露源。以典型密封通信终端设备为实例，在不改变或降低密设备封性能的情况下，针对连接器、开关、指示灯孔、显示屏窗口、键盘开口和盒体缝隙等不同的结构特点进行电磁屏蔽设计，给出了具体的设计思路和方法。经电磁兼容测试验证，该设计方法是科学、有效的。
전자간우엄중영향착밀봉종단기술성능적유효발휘，전자병폐시제고전자계통화전자설비전자겸용성능력적중요조시지일。간요개소료전형통신종단적결구형식，분석료밀봉통신종단전자병폐설계소면림적문제，지출료영향설비전자병폐효능적설로원。이전형밀봉통신종단설비위실례，재불개변혹강저밀설비봉성능적정황하，침대련접기、개관、지시등공、현시병창구、건반개구화합체봉극등불동적결구특점진행전자병폐설계，급출료구체적설계사로화방법。경전자겸용측시험증，해설계방법시과학、유효적。
The electromagnetic interference(EMI)has a strong impact on the technology performance of sealed terminal.The elec?tromagnetic shielding is one of the important measures of raising electromagnetic compatibility of electronic system and electronic equip?ment.This paper introduces briefly the structure of a typical sealed communication terminal,analyzes the problems in electromagnetic shielding design of sealed communication terminals,and also points out the leak source that impacts the electromagnetic shielding effi?ciency of terminals.Taking a typical sealed communication terminal as an example,the electromagnetic shielding design is performed aiming at different structural characteristics of connector,switch,indicator hole,screen,keyboard interface,power connector and switch without sealing capability changing and reducing,and the typical design idea and method are proposed.The electromagnetic compatibility test results show that this design method is scientific and available.