摘要
根据多波模传输理论推导出多波模综合作用下因巷道壁粗糙度引起的电磁波衰减计算公式,并采用多波模模型仿真分析巷道壁粗糙度对电磁波衰减特性的影响。Matlab仿真结果表明,巷道壁粗糙度对电磁波衰减特性的影响随频率升高而增大,由于波导效应和巷道壁粗糙度的共同作用,煤矿井巷电波传播存在一个0.4～2GHz的低衰减频段。
The paper deduced formula of electromagnetic wave attenuation caused by wall roughness under combined effects of multi wave mode according to transmission theory of multi wave mode, and simulated and analyzed effect of wall roughness on attenuation characteristics of electromagnetic wave by multi mode model. Matlab simulation results show that influence of wall roughness on attenuation characteristic increases with frequency. Due to combined effects of waveguide and wall roughness, there is a frequency range with low attenuation of 0.4-2 GHz in wave propagation in coal mine tunnels.
出处
《工矿自动化》
北大核心
2013年第3期43-45,共3页
Journal Of Mine Automation
基金
中国矿业大学高水平学术论文专项基金项目(2012LWB75)
关键词
煤矿巷道
巷道壁粗糙度
电波传播
多波模模型
低衰减频段
coal mine tunnel
wall roughness
wave propagation
multi wave mode model
lowattenuation frequency range
