Applied 25Gb/s Electrical Connector and Printed Circuit Board Design

• Main Authors: Yat-Sen Ma, 馬奕先
• Other Authors: Po-Jui Chiang
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/3zx584

碩士 === 國立高雄應用科技大學 === 電子工程系碩士班 === 102 === The high data rate is greatly demand due to the advent of the cloud computing. In the data center, the data transmission between servers become busy. The data rate will be mainly 100Gbps for the Ethernet in the future. Now, IEEE 802.3bm standard for Ethernet in 100GBase SR4 (4×25Gb/s) is discussed.In the fabrication of optical transceiver modules, some issues need to be explored. First, some microstrips on the top side of the PCB of transceivers have to connect to the bottom side. Therefore, the optimization of the connection is discussed. We inserted four ground via-holes around the signal via-hole to improve the transmission performance. The transmission bandwidth is improved from 10.3GHz to 22.12GHz effectively. Second, the performance of a zQSFP+ connector of the evaluation board (EVB) is analyzed. The transmission bandwidth could go to 20GHz. Third, a SMPM miniature connector is designed and the connection between microstrips of PCB is optimized. After optimization, the measured Rise Time, Fall Time and Jitter for 25Gbps eye diagrams are improved from 21.7-ps、29.8-ps and 1.3-ps to 18.9-ps、19.6-ps and1.16-ps, respectively.