地铁微带缝隙天线阵列的设计及其辐射性能研究  

Design of Microstrip Slot Antenna Array Used in Subway and Research on the Radiation Performance

作　　者：李致兴 LI Zhixing(China Railway First Survey and Design Institute Group Ltd.,710043,Xi′an,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,西安工程师710043

出　　处：《城市轨道交通研究》2018年第4期21-24,共4页Urban Mass Transit

摘　　要：微带缝隙天线阵列结构紧凑,覆盖范围广,不容易产生通信盲区,可制成漏缆敷设于地铁隧道内,提高地铁无线通信的可靠性和便利性。基于电磁场与电磁波的传播原理,设计适用于地铁无线通信的微带缝隙天线阵列,运用三维电磁仿真软件HFSS模拟其各项辐射性能指标。仿真结果表明:缝隙的开缝角度和排列方式对天线的辐射性能有影响,当缝隙角度为30°时,回波损耗比增加,电压驻波比减小,天线的辐射效率上升,增益提高;当缝隙八字排列时,馈源端口的相互影响最低,天线的定向性最好,获得的增益最高。The structure of Microstrip slot antenna array structure is compact,it covers a wide range,produces less communication blind spots,and can be made in submarine cable for tunnel laying to improve the reliability and convenience of subway wireless communications.Based on the propagation principle of electromagnetic field and electromagnetic wave,a microstrip slot antenna array suitable for subway wireless communication is designed.The radiation performance index of antenna array is simulated by using 3D electromagnetic simulation software.The numerical simulation results show that the effect of the opening angle on the radiation performance of antenna demonstrates the following rules:when the slot angleɑis 30 degree,the return loss ratio,antenna radiation efficiency and the gain will increase,the voltage standing wave ratio be decreased;when the antenna array is arranged like a Chinese character“八”,the influence of feed port will be the lowest,the orientation of the antenna be the best together with the highest gain.

关 键 词：地铁隧道 微带缝隙天线阵列 三维电磁仿真软件 辐射性能仿真 

分 类 号：U231.7[交通运输工程—道路与铁道工程]