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Optimization and Design of Passive Link with Single Channel 25 Gbps Based on High-Speed Backplane

Faculty of Information Technology, Beijing University of Technology, Beijing 100124, China
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Authors to whom correspondence should be addressed.
Academic Editors: Chua-Chin Wang and Arezki Benfdila
Received: 22 June 2021 / Revised: 16 July 2021 / Accepted: 22 July 2021 / Published: 24 July 2021
(This article belongs to the Special Issue Excellent Papers from IEEE ICET 2021)
In recent years, with the development of the communication industry, the need to use Ethernet switches to transmit big data has become more urgent, and its protocol standards are iterating towards higher return loss, wider bandwidth, lower impedance fluctuations and insertion loss. Based on the research of high-speed backplane with a single channel 25 Gbps transmission rate, a novel double grounded planar strip coplanar waveguide design is presented, which significantly improved return loss to 20 dB and reduced insertion loss, which meet the loss standard of 100GBASE-KR4. The resonant cavity model of transmission line reference plane is improved by introducing vias and the parameters of vias in the reference plane are studied to reduce the impact of resonance, which improved the transmission −1 dB bandwidth to 60 GHz. Based on equivalent circuit analysis of differential vias’ joint reverse pad, the parameters related to the differential vias are studied, the impedance fluctuation is reduced to 100 ± 3 Ω, which is 70% better than the impedance fluctuation standard (100 ± 10 Ω) of 100GBASE-KR4. After optimizing the mathematical model of strip coplanar waveguide, reference plane and differential vias, we built a simulation model of the backplane passive link which met the 100GBASE-KR4 backplane Ethernet specification. In the actual test, it was found that the optimized model can improve the link performance. View Full-Text
Keywords: high-speed passive link; 25 Gbps; strip coplanar waveguide; via; 100GBASE-KR4 high-speed passive link; 25 Gbps; strip coplanar waveguide; via; 100GBASE-KR4
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MDPI and ACS Style

Liu, J.; Zhang, K.; Wu, Q.; Peng, L.; Yao, K.; Liu, H. Optimization and Design of Passive Link with Single Channel 25 Gbps Based on High-Speed Backplane. Electronics 2021, 10, 1773. https://0-doi-org.brum.beds.ac.uk/10.3390/electronics10151773

AMA Style

Liu J, Zhang K, Wu Q, Peng L, Yao K, Liu H. Optimization and Design of Passive Link with Single Channel 25 Gbps Based on High-Speed Backplane. Electronics. 2021; 10(15):1773. https://0-doi-org.brum.beds.ac.uk/10.3390/electronics10151773

Chicago/Turabian Style

Liu, Jie, Kai Zhang, Qiang Wu, Li Peng, Kai Yao, and Hu Liu. 2021. "Optimization and Design of Passive Link with Single Channel 25 Gbps Based on High-Speed Backplane" Electronics 10, no. 15: 1773. https://0-doi-org.brum.beds.ac.uk/10.3390/electronics10151773

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