高速传输电连接器差分阻抗优化
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摘要
针对高速传输电连接器研发样机中存在差分阻抗偏小及不连续等问题,基于信号完整性理论提出了更换介质材料和修改接触件及介质尺寸的优化方案。采用HFSS高频电磁场仿真软件优化了接触件引脚直径W_1和引脚与介质体的配合长度L_1,仿真结果表明当引脚直径W_1=1.1 mm时,此时连接器差分阻抗仿真值为100±10Ω,且介质体配合长度L_1对连接器差分阻抗仿真值影响较小。对优化前后的连接器进行了样机加工及差分阻抗测试,测试结果表明改进前连接器差分阻抗范围为84.46~90.68Ω,改进后为92.6~105.3Ω,改进后的连接器差分传输眼图满足典型高速传输电连接器信号完整性传输要求。
In order to resolve the differential impedance of electric connector is relatively small and discontinuous at the R & D stage,the optimization scheme which is composed of the replacement of the dielectric material and the modification of the contact and the medium size based on the theory of signal integrity are proposed.The HFSS high frequency electromagnetic field simulation software was used to optimize the contact pin diameter(W_1) and fit lengths of contact and dielectric(L_1).When the pin diameter is 1.1 mm,the simulation value of the differential impedance of connector is 100 ± 10 Ω and L_1 has little influence on the simulation value of differential impedance of connector.The improved connector was processed and the differential impedance test was carried out.The test results show that the differential impedance range of connector is from 84.46 to 90.68 Ω before improvement and from 92.6 to 105.3 Ω after improvement,differential transmission eye diagram meets typical high-speed transmission electric connector signal integrity transmission requirements after improvement.
In order to resolve the differential impedance of electric connector is relatively small and discontinuous at the R & D stage,the optimization scheme which is composed of the replacement of the dielectric material and the modification of the contact and the medium size based on the theory of signal integrity are proposed.The HFSS high frequency electromagnetic field simulation software was used to optimize the contact pin diameter(W_1) and fit lengths of contact and dielectric(L_1).When the pin diameter is 1.1 mm,the simulation value of the differential impedance of connector is 100 ± 10 Ω and L_1 has little influence on the simulation value of differential impedance of connector.The improved connector was processed and the differential impedance test was carried out.The test results show that the differential impedance range of connector is from 84.46 to 90.68 Ω before improvement and from 92.6 to 105.3 Ω after improvement,differential transmission eye diagram meets typical high-speed transmission electric connector signal integrity transmission requirements after improvement.
引文
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[2]LIU Y M,CAO Y SH.Analysis and simulation of via in high-speed PCB[J].Computer Engineering and Design,2008,29(3):713-715.
[3]WU J.Simultaneous computation of wide-angle and wideband base on asymptotic waveform evaluation[C].2012International Conference on Computer Science and Electronics Engineering(ICCSEE),2012(2):359-362.
[4]杨奋为.军用电连接器的应用与发展[J].机电元件,2007,27(3):42-49.YANG F W.Application and development of military electrical connector[J].Electromechanical Components,2007,27(3):42-49.
[5]CHEN W H,LIU J,GAO L,et al.Accelerated degradation reliability modeling and test data statistical analysis of aerospace electrical connector[J].Chinese Journal of Mechanical Engineering,2011,24(6):957-962.
[6]梁云忠,乔玉鹏,金波,等.毛刷电接触对的插拔力研究[J].工程设计学报,2015,22(3):290-294.LIANG Y ZH,QIAO Y P,JIN B,et al.Study on insertion-extraction force of the brush electrical contact[J].Chinese Journal of Engineering Design,2015,22(3):290-294.
[7]SAWCHYN I,SPROLES E J.Optimizing force and geometry parameters in design of reduced insertion force connectors[J].IEEE Transactions on Components,Hybrids,and Manufacturing Technology,1992,15(6):1027-1031.
[8]陈毓彬.连接器高速传输性能测试技术研究[D].广州:华南理工大学,2013:10-15.CHEN Y B.The connector high-speed transmission performance test technology research[D].Guangzhou:South China University of Technology,2013:10-15.
[9]余文志,李晓磊,吴柏昆,等.微带线阻抗不连续性的补偿研究[J].仪表技术与传感器,2015(8):88-91.YU W ZH,LI X L,WU B K,et al.Analysis of compensation of microstrip line impedance discontinuity[J].Instrument Technique and Sensor,2015(8):88-91.
[10]赵宇萍,刘治国.基于TDR技术的连接器高速传输性能测试[J].电子产品可靠性与环境试验,2012(S1):134-137.ZHAO Y P,LIU ZH G.High speed transmission performance test of connector based on TDR technology[J].Electronic Product Reliability and Environmental Testing,2012(S1):134-137.
[11]邹翔,彭清华.连接器行业最新发展趋势分析[J].机电元件,2014,34(5):45-48.ZOU X,PENG Q H.Analysis on the latest development trend of connector industry[J].Mechanical and Electrical Components,2014,34(5):45-48.
[12]易茂祥,陶金,吴友杰,等.一种基于电力线的现场总线设计与仿真[J].电子测量与仪器学报,2015,29(02):258-264.YI M X,TAO J,WU Y J,et al.Design and simulation for a power lines based fieldbus[J]Journal of Electronic Measurement and Instrumentation,2015,29(2):258-264.
[13]任庆芳,宋智,薛严冰.基于AD8302的简易阻抗测量仪[J].电子测量技术,2016,39(2):106-110.REN Q F,SONG ZH,XUE Y B.Simple impedance meter based on AD8302 chip[J].Electronic Measurement Technology,2016,39(2):106-110.
[14]严冬,汪朋,李帅永,等.2.45 GHz印刷倒F天线的研究与实现[J].仪器仪表学报,2015,36(10):2372-2380.YAN D,WANG P,LI SH Y,et al.Research and realization of 2.45 GHz printed inverted Fantenna[J].Chinese Journal of Scientific Instrument,2015,36(10):2372-2380.
[15]尤嘉,宣银良.矢量网络分析仪校准和验证的常见误区[J].国外电子测量技术,2016,35(4):1-6.YOU J,XUAN Y L.Correcting some common misunderstandings on VNA calibration and verification[J].Foreign Electronic Measurement Technology,2016,35(4):1-6.