车载通讯终端PCB晶振辐射骚扰的研究与整改  

Research on Suppression of Radiated Emission(RE)Caused by Crystal Oscillator on PCB of an Automotive Telematics Box(T-Box)

作　　者：常君 叶丹 肖剑阁 王寅冬 孙宏宇 CHANG Jun;YE Dan;XIAO Jian-ge;WANG Yin-dong;SUN Hong-yu(Neusoft Group(Dalian)Co.,Ltd.,Dalian 116085,China)

机构地区：[1]东软集团(大连)有限公司,辽宁大连116085

出　　处：《汽车电器》2021年第5期38-40,共3页Auto Electric Parts

摘　　要：在对车载通讯终端(T-Box)做电磁兼容辐射骚扰试验时,出现了辐射限值超出标准中规定的限值要求的现象,导致该设备无法通过试验,经过对晶振回路分析、现场PCB整改,通过了该项试验。因此,为了确保产品品质,提出了在设计之初,应采取的一系列预防措施,即从原理设计、PCB布局设计方面入手,并予以详细介绍。Electromagnetic compatibility(EMC)test is mandatory for automotive telematics box(T-box)products.However,the T-box may not pass the radiated emission(RE)test due to its RE values exceeding the limits defined in the testing standard.By analyzing the on-board crystal oscillator circuit and modifying the corresponding PCB layout,the RE value can be effectively suppressed below the limits.In order to ensure the product quality,it is essential to take preventive measures at the beginning of the design.In this article,optimization techniques for crystal oscillator schematic and layout design will be introduced in detail.

关 键 词：车载通讯终端 辐射骚扰 PCB 晶振 整改 

分 类 号：U463.6[机械工程—车辆工程]