射频差分网络混合模式S参数的应用  

Mixed mode S-parameters for applications of RF differential networks

作　　者：陈迎潮 杨曙辉[2] 

机构地区：[1]南卡罗莱纳大学电气工程系,美国哥伦比亚29208 [2]北京信息科技大学光电信息与通信工程学院,北京100192

出　　处：《北京信息科技大学学报（自然科学版）》2009年第2期37-44,共8页Journal of Beijing Information Science and Technology University

基　　金：国家高技术研究发展(863)计划基金资助项目(2007AA04Z352);国家自然科学基金资助项目(60501007);北京市属高校人才强教资助项目(71A0811104)

摘　　要：印刷电路板(PCB)上芯片管脚之间的连线,通常采用差分线的形式。当所传输的信号频率很高时,成为一个典型的微波传输线,需要利用混合模式的S参数进行研究。在一般射频(RF)及微波N-端口网络单端S参数基础上,针对差分网络给出并发展了混合模式S参数的表达式和性质。利用Ansoft HFSS软件混合模式S参数设计了PCB上一对包含有互连(过孔)的差分线,并用这个差分线建立了一个差分电路系统,传输速率为3GB/s的随机数字信号,在接收端提取了相关的接收电压信号和眼图。模拟结果表明,经过总计5英寸长的PCB传输线路后,所接收的信号仍然保持了良好的质量。The traces between PCB chip dies are commonly exhibited in the form of differential pair. When the transmitted signal is in high frequency, the traces become a typical microwave transmission line,which needs to be researched by using mixed-mode scattering parameters （S-parameters）. The paper begins with a review of the single-ended S-parameters and properties for a generalized RF and microwave N-port network. Then, we give and extend the mixed mode S-parameter representation and its properties for a differential network. On the base of mixed-mode S-parameters, we design a pair of differential traces printed on a PCB using Ansoft HFSS, and we construct a differential schematic circuit using the differential traces, to transmit 3 GB/s random digital signals. In the receiver, we extract the associated Rx voltage signals and eye diagram. Simulation results show that the received signals for the total five inch length of the PCB traces remain good quality.

关 键 词：射频 混合模式S参数 差分网络 传输线 眼图 

分 类 号：TN911.4[电子电信—通信与信息系统]