In this article, we firstly introduce the obstacles in the design of a lOGbps serial backplane and how to estimate the performance of a channel accurately with specification. And then, we build a model and simulate its performance by the S parameter and eye diagram based on a typical backplane channel. In order to analyze the significant impact of crosstalk, we especially build a model of two side-by-side channels and analyze its NEXT and FEXT from the S parameter, and compare the eye openings of the signal transmitted with different crosstalks. The simulation results indicate that the impact of crosstalks with two different analysis methods can keep consistent and may be tolerated without errors. Finally, the performance of the backplane channel which has been verified by a test board can meet the specification of lOGbps signal transmission.%在高性能计算机系统中,10Gbps串行背板互连设计需求日益显现.作为超高频互连传输,10Gbps背板互连设计中准确仿真和有效分析其传输性能的难度越来越大.本文简要介绍10Gbps背板互连的设计难点,总结提出通道的判断标准.针对一种典型背板通道的设计进行建模和仿真,并通过S参数和传输眼图两种方式分析单通道的传输性能.同时,针对超高频信号串扰影响逐渐加大的现实,建立双通道模型,从S参数角度对近端和远端串扰进行分析,并从传输眼图的角度进行定量对比,结果表明两种分析结果能够符合一致,串扰影响完全可控.通道设计性能经测试可以满足10Gbps信号传输.
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