然后介绍了无线信道的传播机制基本概念以及井下巷道电波传播特性；
Then, the paper introduced the basic concepts of wireless channel transmission mechanism as well as the characteristics of radio wave propagation in underground tunnels;
在此基础上对高速铁路的电波传播特性进行了小尺度衰落特性的研究分析。
On the base of this channel, we analyze the characteristics of the radio wave small-scale fading.
微区电波传播特性分析模型多是理论模型，采用射线追踪法，对源辐射情况进行模拟。
Most propagation models , which can be adapted micro cellcluar are theory method based on ray tracing method.
随着高频电磁波技术的迅猛发展，复杂环境下的电波传播特性预测已经成为一个重要的研究课题。
Along with the rapid development of high frequency radio technology, predicting characteristics of radio propagation in complex environments has become an important research subject.
本文概述了超高频电波在陆地上的传播特性和传播方式及视距和通信距离的计算；
In this paper, the transmission performance and transmission manner of superfrequency electric wave and the calculations of stadia and communication distance are discussed.
研究UHF频段的无线电波在矩形、圆形和拱形隧道中的传播特性，推导了衰减常数的计算公式。
Propagation characteristic of UHF radio wave in rectangle, circle and arched tunnels is studied in this paper and the computing equation for attenuation constant is deduced.
研究UHF频段的无线电波在矩形、圆形和拱形隧道中的传播特性，推导了衰减常数的计算公式。
Propagation characteristic of UHF radio wave in rectangle, circle and arched tunnels is studied in this paper and the computing equation for attenuation constant is deduced.
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