铁路隧道中无线电波 传播特性的研究

郑国莘; 张文海; 张跃平; 盛剑桓

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铁道工程学报 ›› 1999, Vol. 16 ›› Issue (1) : 92-97.

路网研究

铁路隧道中无线电波传播特性的研究

郑国莘，张文海，张跃平，盛剑桓

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THEORY OF RADIO WAVE PROPAGATION IN RAILWAY TUNNEL

ZHENG Cuoshen,ZHANG Wenmei,ZHANG Yueping,SHENG Jianheng

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摘要

本文首先给出了隧道中有列车通过时的简化模型——超大尺寸周期加载的不完全矩形波导模型，导出了这种结构中列车的表面阻抗.在此基础上.研究了无线电波在铁路隧道中的传播特性。得到了关于TSMq.mo模的传输模方程以及TSM1.10的衰减常数。研究结果表明：HEM11模和 TSMq.mo模能在铁路隧道中传播，而TSMq.mo不能.另外，本文重点讨论了 TSM1.10模的衰减常数在不同条件下的频率特性，以及车厢中旅客对传播特性的影响。

Abstract

Research on radio wave propagation in tunnels has important application for mobile and personal communication. This paper first briefly reviews radio wave propagation in empty tunnels, and then concentrates on characterizing radio wave propagation in tunnels loaded with trains. For this purpose, an oversized imperfect periodically loaded rectangular waveguide is proposed, and surface impedance approximation is adopted to formulate the problem. The theoretical results show that HEM11 and TSMq.mo modes can propagate. Meanwhile, why TSMq.mo modes can not exist is also proved.The close form propagation constants for those import TSMq.mo modes are obtained. The numerical results for the propagation attenuation of the dominant TSM1.10 are presented. The influence of passengers on propagation is discussed.

导出引用

郑国莘, 张文海, 张跃平, 等. 铁路隧道中无线电波传播特性的研究[J]. 铁道工程学报, 1999, 16(1): 92-97

ZHENG Cuoshen, ZHANG Wenmei, ZHANG Yueping, et al. THEORY OF RADIO WAVE PROPAGATION IN RAILWAY TUNNEL[J]. Journal of Railway Engineering Society, 1999, 16(1): 92-97

中图分类号： U453.7

参考文献

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