基于FEKO无线透地通信天线电磁特性的探究

The Exploration of Antenna about Electromagnetic Properties of the Wireless Through-the-Earth Communication Based on FEKO

基于FEKO7.0建立了矿井无线透地通信磁场模型,设计了3种体积不同、匝数不同但输入电阻相同的铁氧体磁性天线,研究了该模型在地面上的磁场分布情况,频率采用甚低频15 k Hz。结果表明:这3种铁氧体模型在地面上产生了3种不同数量级的磁场强度,并采用竖直和水平两种安装方式,其量值都在电磁传感器可以检测到的范围内。研究发现,地面产生磁场强度的大小与铁氧体天线的体积和放置形式有关,水平放置比竖直放置产生了较大的磁场强度。因而,利用磁场代替调制电磁波作为矿井无线透地通信的传输媒介是可行的。

The paper built the mine wireless through-the-earth communication magnetic model by FEKO7.0.It has designed three kinds of ferrite models that including different volumes,different turns while the same input resistance to explore the magnetic field distribution on the ground.The frequence is the VLF 15 k Hz. It showed that the three kinds of ferrite models on the ground using both the vertical and horizontal installation could produce three different orders of magnitude of the magnetic field intensity and it can be detected by the electromagnetic sensors.The study also found that the magnitude of the magnetic field intensity is related to the volume and the placement forms of the ferrite antenna while horizontal type could generate larger magnetic field intensity than vertical type. Therefore,we use the magnetic field instead of modulated electromagnetic waves as the medium of the mine wireless through-the-earth communication is feasible.