时速350km中国标准动车组车载天线的隔离度及最小排布间距  

Isolation between Vehicle-Mounted Antennas for 350 km·h^−1 Chinese Standard EMU and Minimum Spacing

作　　者：窦垭锡 李毅 李辉 鲍峻松 蔺伟 DOU Yaxi;LI Yi;LI Hui;BAO Junsong;LIN Wei(Signal and Communication Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Nanjing Baoshili Information Technology Co.,Ltd.,Nanjing Jiangsu 210012,China)

机构地区：[1]中国铁道科学研究院集团有限公司通信信号研究所,北京100081 [2]南京保时利信息科技有限公司,江苏南京210012

出　　处：《中国铁道科学》2021年第1期130-136,共7页China Railway Science

基　　金：中国铁路总公司科技研究开发计划课题(J2018G009);中国铁道科学研究院集团有限公司科研开发基金项目(2017YJ055)。

摘　　要：基于中国标准动车组车载终端设备的部署现状和未来规划,调研其采用的通信系统类型、车载天线的工作频率和安装数量;以900 MHz频段GSM-R系统、450 MHz频段和2100 MHz频段LTE-R系统为例,对车载终端的杂散干扰进行理论分析,基于自由空间损耗理论模型计算、电磁软件仿真模拟和试验平台实测的结果,研究车载天线的隔离度,提出满足车载通信终端干扰隔离度需求的合理天线间距。结果表明:为了实现动车组车载终端的互不干扰,对于900 MHz频段GSM-R系统和2100 MHz频段LTE-R系统,车载天线间距需达到0.5 m;对于450 MHz频段LTE-R系统,车载天线间距则需大于3.0 m。未来我国动车组车载天线的发展应定位在:研发宽频段多业务组合天线、对车载天线布局进行标准化设计、支持公网运营商5G频率等方面。Based on the current deployment and future planning of the vehicle-mounted terminals in Chinese standard EMU,the type of communication system,working frequency and number of vehicle-mounted antennas are investigated.Taking the GSM-R system of 900 MHz band,the LTE-R system of 450 MHz band and 2100 MHz band as examples,the stray interference of vehicle-mounted terminals is theoretically analyzed.Based on the the theoretical model calculation of free space loss,the electromagnetic software simulation and the measured results of the test platform,the isolation of vehicle-mounted antennas is studied and a reasonable antenna spacing is proposed to meet the needs for the interference isolation of vehicle-mounted communication terminals.Results show that in order to achieve the non-interference between the vehicle-mounted terminals of the EMU,for the 900 MHz band GSM-R system and the 2100 MHz band LTE-R system,the vehiclemounted antenna spacing must reach 0.5 m;for the 450 MHz band LTE-R system,the vehicle-mounted antenna spacing should be greater than 3.0 m.In the future,the development of the vehicle-mounted antennas for EMUs in China should be positioned in the following aspects:researching and developing combined wideband multi-service antennas,standardizing the layout of vehicle-mounted antennas and supporting 5G frequency of public network,etc.

关 键 词：车载天线 天线间距 天线隔离度 杂散干扰 馈线损耗 中国标准动车组 

分 类 号：U285.28[交通运输工程—交通信息工程及控制] U279[交通运输工程—道路与铁道工程]