漏泄矩形波导在巷道内辐射特性研究

Study on radiation characteristics of leaky rectangle waveguide in roadway

针对漏泄矩形波导传输信号具有纵向衰减小、传输速率高、变化幅度小等特征,其平面结构具有强度高、质量小、易于安装等优点,采用漏泄矩形波导构建煤矿井下局部或全局移动通信系统,基于HFSS仿真软件建立了矿井巷道内漏泄矩形波导辐射模型,仿真分析了漏泄矩形波导在矿井巷道内的辐射特性。仿真结果表明:漏泄矩形波导仅在功率较小的1 W信号源激励下,就可在距离漏泄矩形波导正上方1.5 m的平面上提供大于-100 d Bm的辐射功率,可为漏泄矩形波导周围的移动台提供可靠的无线接收信号强度。漏泄矩形波导覆盖的煤尘层和漏泄波导缝隙的堵塞结块均会对漏泄矩形波导的辐射特性造成一定影响,漏泄矩形波导在使用时需要采取必要的防护措施。

According to the transmission signals of the leaky waveguide had the low longitudinal damping,high transmission speed,low variation amplitude and other features and the plane structure had a high strength,low weight,easy installation and other advantages,the leaky rectangle waveguide was applied to establish the local or full mine mobile communication system in the underground mine. Based on the HFSS simulation software,a radiation model of the leaky rectangle waveguide was established in the mine roadway and the radiation characteristics of the leaky rectangle rectangle rectangle waveguide in the mine roadway were simulated and analyzed. The simulation results showed that only under the excitation of the small 1 W signal source power,the leaky rectangle waveguide could provide-100 d Bm radiation power on the plane right above 1.5 m distance top of the leaky rectangle waveguide and could provide reliable and high received signals to the mobile stations around the leaky rectangle waveguide. The coal dust layer covered by the leaky rectangle waveguide and the jammed blocks in the cracks of the leaky rectangle waveguide both would cause certain influences to the radiation characteristics of the leaky rectangle waveguide. Necessary protective measures should be conducted when the leaky rectangle waveguide was applied.