摘要
研究了圆形隧道中电磁波的固有传播和导行传播的传播特性,采用数值方法求解了波模方程。得出如下结论:在空圆形隧道中,频率越高电磁波的衰减率越小,隧道半径越大衰减率越低;隧道中的弯曲不利于电磁波的传播;曲率半径越小电磁波衰减越大;隧道中的纵向导体利于电磁波的传播,导线越靠近隧道的中央,越有利于电磁波的传播;隧道半径的增大,也有利于导行电磁波的传播。这些结论对矿井通信建设有一定的指导意义。
In this work, the propagation characteristic of electromagnetic wave in a round tunnel is simulated by solving numerically the wave mode equations. It is concluded as following. Firstly, in a hollow round tunnel, the attenuation rate will become smaller when frequency gets higher or tunnel's radius becomes greater. Secondly, the tunnel s curvature is not benefit to wave s propagation. Thirdly, the axis-conductor's existence is benefit to wave's propagation and the affection will become great when the conductor is close to tunnel's center. Finally, the increase of tunnel's size is propitious to guide wave's propagation. Those conclusions have some guidance meaning to the communication construction in a mine well.
出处
《电波科学学报》
EI
CSCD
2003年第4期408-412,共5页
Chinese Journal of Radio Science
