西南交通大学学报2025，Vol.60Issue(2)：462-471,10.DOI:10.3969/j.issn.0258-2724.20240220
小型化轨旁双频天线设计及其电磁兼容性
Miniaturized Dual-Band Trackside Antenna Design and Its Electromagnetic Compatibility Study
摘要
Abstract
To meet the demand for 5G communication in tunnels and increase the utilization rate of trackside antennas,a dual-band trackside antenna based on metamaterials was proposed,which could support both automatic train control systems and civil 5G wireless communication.First,a miniaturized dual-band trackside antenna was designed based on the 5G communication deployment scheme,and the finite element method was used to simulate the electromagnetic properties of the antenna before and after miniaturization.The impact on the electromagnetic environment and other radiation sources in the tunnel was evaluated.Second,a lightweight human body model containing important tissue such as the trunk,skull,brain,and heart was constructed,so as to compare the effects of radiation on the specific absorption rate(SAR)of human tissue between the simulated traditional single-band trackside antenna and the miniaturized dual-band trackside antenna.The results show that the miniaturized dual-band trackside antenna is 40%and 20%smaller than the traditional single-band trackside antenna when the antenna operates at 2.45 GHz and 3.40 GHz,respectively,and the electric field strength in the surrounding tunnel space is reduced by over 2.09%and 6.57%.The induced electric field strength on the leaky coaxial cable is reduced by 19.67%and 32.41%,respectively.The miniaturization of the antenna effectively reduces the impact on surrounding radiation sources and improves the electromagnetic compatibility of the trackside antenna inside the tunnel.The miniaturized dual-band trackside antenna makes the SAR values absorbed by the trunk,skull,brain,and heart of the human body drop by 19.76%,46.60%,55.62%,and 55.28%,respectively,which significantly decreases the radiation impact of the trackside antenna on occupational groups.关键词
轨旁天线小型化/超材料单元/地铁隧道/电磁兼容/电磁暴露Key words
miniaturization of trackside antennas/metamaterials unit/subway tunnel/electromagnetic compatibility/electromagnetic exposure分类
交通运输引用本文复制引用
周文颖,许进京,逯迈,李宇新..小型化轨旁双频天线设计及其电磁兼容性[J].西南交通大学学报,2025,60(2):462-471,10.基金项目
国家自然科学基金项目(62161017,61701208) （62161017,61701208）
甘肃省教育厅高校科研创新平台重大培育项目(2024CXPT-11) （2024CXPT-11）
甘肃省联合科研基金项目(24JRRA858) 智元实验室开放基金(ZYL 20240004)的资助. （24JRRA858）
