高速PCB插损影响因子研究  

Study on influence factors of high speed PCB insertion loss

作　　者：雷璐娟 雷川 李金鸿 徐竟成 涂逊 Lei Lujuan;Lei Chuan;Li Jinhong;Xu Jingcheng;Tu xun

机构地区：[1]重庆方正高密电子有限公司,重庆401332

出　　处：《印制电路信息》2022年第S01期28-34,共7页Printed Circuit Information

摘　　要：随着高速电路的传输速率不断提升,电子产品不断微小化、精密化、高速化,使得电路的集成度越来越高。PCB不仅要完成各种原器件的线路连接,更要考虑高密高速带来的信号完整性问题。高速互连中首要的信号完整性问题是传输线损耗,损耗会引起信号上升沿的退化和幅度的衰减,导致严重的信号失真。通过各种仿真软件虽然能够仿真出各影响因子对损耗的理论影响趋势,但实际生产中往往与仿真结果存在一定偏差。文章仅针对参考层厚度、线宽、线距、PCB排版时图形旋转角度及背钻Stub长度对插入损耗的影响进行实验研究,并得出较为准确的设计区间,为高速信号传输的选材及设计优化提供依据,使实际生产结果与理论模拟更为接近。With the continuous improvement of the transmission rate of high-speed circuits,the miniaturization,precision and high-speed of electronic products have made the integration of circuits higher and higher.PCB not only needs to complete the circuit connection of various original devices,but also considers the signal integrity problem brought by high density and high speed.The primary signal integrity issue in high-speed interconnects is transmission line loss,which causes degradation of the rising edge of the signal and attenuation of the amplitude,resulting in severe signal distortion.Although the theoretical influence trend of each influence factor on the loss can be simulated through various simulation software,there is often a certain deviation from the simulation results in actual production.This paper only studies the influence of reference layer thickness,line width,line distance,graphic rotation Angle and back-drill Stub depth on insertion loss,and obtains more accurate design interval,which provides basis for material selection and design optimization of high-speed signal transmission.

关 键 词：高速PCB 插耗 旋转角度 差分Skew 玻纤效应 背钻Stub 线宽 线距 介厚 

分 类 号：TN41[电子电信—微电子学与固体电子学]