目前主流的列车通信网络（TCN）由绞线式列车总线（WTB）和多功能车辆总线（MVB）组成，我们来了解为互连车辆而设计的串行数据通信总线WTB，其作为列车车厢间通信的总线协议如何控制着整个列车的网络通信的正常运行。WTB概述WTB为绞线式列车总线，它是以德国DINV3322和意大利CD450高速列车的数据通信经验为基础而制定的，常用于相互连挂和解连的重联车辆。WTB使用双绞线电缆。电线的布置采用冗余原则，在各个车辆的每一侧各有一根电缆。
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PV023R1K8T1NFWS
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PV023R1K8T1N001
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PV023R1K4T1NMMC
PV023R1K1T1NKLC
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PV023R1K1T1NFFP
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PV028R1K1T1N001
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PV032R1K1T1N100
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PV032R1K1T1WMMC
PV032R1K4T1NMMC
PV032R1K8T1VMMC
PV032R1K1T1WFR1
PV032R1K1T1NFFC
PV032R1K1JHNMMC
PV032R1K1T1WMRC
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结构与等效电路本文提出的*CMRC平面结构如所示，其LC等效电路模型如所示。介质基板采用TaconicCER_1，其介电常数er=9.5,厚度.64mm。图CMRC的平面结构图LC等效电路模型滤波器特性仿真分析主要结构参数对传输特性的影响我们对所示CMRC结构应用HFSS进行建模以及仿真，并分析了主要结构参数对滤波器传输特性的影响。在仿真中我们发现xy1以及y2对滤波器传输特性的影响较大，其影响特性曲线如至所示，由和可知减小x1和y1可以降低谐振频率，从而相应的可以减小低通频率范围，这是因为在等效电路模型中，减小x1或y1都可以提高单位长度的分布串联电感(L和L1)。
