摘要
轨道交通隧道的特殊结构导致波导环境的形成。抛物线模型作为研究电波传播的主要模型,考虑了空气湍流的影响。针对空气湍流影响微波传播的问题,根据隧道中空气湍流的变化规律,结合抛物线模型,推导出轨道交通隧道波导环境下电波的传播损耗模型。结论是隧道湍流折射率结构参数越大,微波的传输损耗越高。在隧道湍流的作用下,接收天线高度的不同也影响传输损耗.接收天线越高传输损耗越小。以上结论为研究隧道波导环境中电波的传播提供理论参考。
The special structure of rail transit tunnel leads to the formation of waveguide environment. A parabolic model is used as the main model to study the propagation of radio waves and the influence of air turbulence is consid- ered in the model considers. Aiming at the problem of the influence of air turbulence on microwave propagation, ac- coming to the regulation of change in the tunnel air turbulence, and combining the parabola model, the propagation loss model of microwave in the tunnel wave guide environment of rail transit was derived. The conclusion is that the larger the refractive index structure constant of the tunnel is, the higher the microwave propagation loss is. In the in- fluence of the tunnel turbulence, the difference in the height of receiving antenna also affects the transmission loss, and the propagation loss is smaller with the higher receiving antenna. This conclusion provides a theoretical reference for the study of the propagation of radio waves in the tunnel waveguide environment.
作者
付新涛
赵恒凯
FU Xin-tao;ZHAO Heng-kai(School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China;Key Laboratory of Specialty Fiber Optics and Optical Access Network,Shanghai University,Shanghai 200072,China)
出处
《计算机仿真》
北大核心
2018年第7期121-124,134,共5页
Computer Simulation
关键词
微波
空气湍流
抛物线模型
传输损耗
Microwave
Air turbulence
Parabolic model
Propagation loss
