DC25_PAPER_TRACK04_StudyOfTDRImpedanceAnd_Tang_V2.pdf

1、Information Classification:GeneralStudy of TDR impedance andloss based on modifiedCannonball-Huray roughnessmodel on a 1.6Tbps opticalmodule PCBRongyao Tang,FiberHome TelecommunicationTechnologies Co.,LShengyao Wan,FiberHome TelecommunicationTechnologies Co.,LInformation Classification:GeneralRui Wa

2、ng,Xpeedic Co.,LYinfei Weng,Xpeedic Co.,LZhi Li,Shennan Circuits Co.,LAbstractWith the increasing demand for optical modules driven by 5G communication andartificial intelligence computing,the signal channel from digital signal processing(DSP)chips to optical devices is expected to exceed 130 Gbaud/

3、s,necessitating a 3 dBbandwidth of over 70 GHz.Furthermore,the signal channel from the DSP chip to thegoldfinger will reach 224 Gbps,with a Nyquist frequency surpassing 56 GHz.Accuratelyand rapidly estimating high-frequency losses within this channel presents a significantchallenge.This paper presen

4、ts a case study on the time-domain reflectometry(TDR)impedance andloss of high-frequency transmission lines in 1.6T optical module printed circuit boards(PCBs).Additionally,it proposes an effective surface ratio value for the Cannonball-Huray model,derived from measured surface roughness parameters

5、and appropriatedielectric loss factors(Df)at millimeter-wave frequencies,facilitating the rapid andaccurate estimation of attenuation through the Djordjevic-Sarkar Debye model.Information Classification:GeneralAuthor(s)BiographyRongyao Tang graduated from the Department of Electronics and Science Te

6、chnology(now the School of Optoelectronic Information)at Huazhong University of Science andTechnology,Wuhan,China and began his career at Chinas largest PCB manufacturer,Shennan Circuits Co.,Ltd.,in2011,focusing on the design of high-speed backplanesignal integrity for manufacturing and was awarded