矿用天线在矩形巷道中应用的最佳波束指标

发布时间：2018-04-02 18:14

本文选题：无线通信　切入点：井下巷道　出处：《煤炭学报》2017年10期

【摘要】：煤矿井巷中,如果天线的波束过宽,则难以有效抑制多径衰落、增大覆盖范围;反之,如果波束过窄,则容易使巷道的边缘区域得不到有效覆盖。利用多波模波导理论,讨论得出理想点源在巷道中的辐射场分布特性是制定矿用天线波束指标的理论依据。在此基础上,推导了井下理想点源的方向函数和半功率波瓣宽度。随后,统计计算结合相关仿真,讨论了巷道波导结构、介质壁电参数、载波频率和电磁波传播距离的影响。根据分析所得,结合相关推导与比较,给出了矿用天线的最佳波束指标:为明显改善巷道内的无线覆盖效果,矿用天线应辐射形状较扁的均值为π/2的Gaussian波束;且天线的半功率波瓣宽度至少要窄于理想点源辐射场在巷道第I,II传播区分界点处的波瓣宽度。
[Abstract]:If the beam of the antenna is too wide, it is difficult to restrain the multipath fading and increase the coverage effectively in the coal mine, whereas if the beam is too narrow, the edge area of the roadway can not be covered effectively.Based on the theory of multimode waveguide, it is discussed that the distribution of radiation field of ideal point source in roadway is the theoretical basis for determining the beam index of mine antenna.On this basis, the direction function and half power lobe width of the ideal point source are derived.Then, the effects of waveguide structure, dielectric wall parameters, carrier frequency and electromagnetic wave propagation distance are discussed.According to the analysis results, combined with correlation derivation and comparison, the best beam index of mine antenna is given: in order to improve the wireless coverage effect in roadway obviously, the mine antenna should radiate the Gaussian beam with a flat shape with the average of 蟺 / 2;The width of the half-power lobe of the antenna is at least narrower than that of the ideal point source radiation field at the boundary point of the IHII propagating zone in the roadway.
【作者单位】：中国矿业大学物联网(感知矿山)研究中心矿山互联网应用技术国家地方联合工程实验室;中国矿业大学信息与控制工程学院;中国矿业大学计算机科学与技术学院;
【基金】：国家自然科学基金面上资助项目(61471361) 江苏省自然科学基金资助项目(BK20160264)
【分类号】：TD65

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