矩形隧道中无线电波的衰减特性分析

通过数值仿真研究了矩形隧道中的电磁场损耗问题。分析了电磁波衰减受相对介电常数、隧道壁粗糙程度、隧道壁的倾斜程度的影响。随着无线通信系统频率的变大,无线电波在巷道内传输的衰减越小,巷道壁粗糙所引起的损耗也越小,但巷道壁倾斜引起的损耗因素将加大。在实际应用中要综合考虑这些因素对电磁波损耗的影响。

Analysis of Radio Wave Attenuation Character in Rectangular Tunnel

To make use of numerical simulation method,the field of electromagnetic wave Attenuation in Rectangular Tunnel was studied in this paper.According to the numerical results,the radio waves attenuation in the mine tunnel is affected by relative dielectric constant,the roughness and tilt.When the frequency is higher,the attenuation rate is smaller,and the loss caused by walls roughness is smaller too,but the loss induced by walls tilt may be greater.We need consider influence of various parameters in actual application.