【作者】 张宇栋； 李铮； 王均宏；

【Author】 ZHANGYudong;LI zheng;WANGJunhong;Institute of Lightwave Technology,Beijing Jiaotong University;

【机构】 北京交通大学光波技术研究所；

【摘要】 本文针对走廊、隧道等受限空间中移动通信易受多径效应与深度衰落影响的问题,提出将一种具有低副瓣特性的定频波束扫描漏波天线应用于该类环境,以抑制隧道中的深度衰落效应,并维持近场区域的高接收功率水平。通过基于镜像原理的射线追踪方法计算隧道内的电场分布,获得了不同波束下的接收功率分布,并基于电场最大值准则得到了合并后的接收功率。结果表明,所采用的电控波束扫描漏波天线能够在隧道场景中有效抑制近场的多径效应,并通过波束切换实现在较大范围内保持接收功率稳定,显著提升通信质量,尤其适用于较短受限空间中的深度衰落抑制。更多还原

【Abstract】 This paper addresses the challenge of multipath effects and deep fading in mobile communications within confined spaces such as tunnels and corridors.A fixed-frequency beam-scanning leaky-wave antenna with low sidelobe levels is introduced to suppress deep fading in tunnel environments and maintain high received power in the near-field region.The electric field distribution inside the tunnel is computed by using a ray-tracing method based on the image theory,obtaining the received power distribution for different scanning beams as well as the combined received power based on the electric field maximization criterion.The obtained results demonstrate that the electronically controlled leaky-wave antenna effectively mitigates near-field multipath effects in tunnel scenarios.By enabling dynamic beam switching,it achieves stable received power over a broad range,significantly enhancing communication quality—particularly in shorter confined spaces where deep fading is prominent.更多还原