基于蜂窝结构的二维磁感应通信

2-D honeycomb MI wave communication system

为实现地下无线传感器网络高可靠通信及无线能量传输,针对VLF频段提出一种二维蜂窝磁感应网络结构,并建立系统模型。通过电流色散方程对系统带宽、群速和波束赋形等进行推导分析。应用四阶龙格库塔方法对磁感应波的传播进行了时域仿真。结果表明,蜂窝磁感应网络可实现磁感应波的全向传播,与方形栅格网络相比,在各传播角度上具有更加均一的带宽、群速,可应用多天线协作技术实现定向通信和输能,适于在地表下环境建立高连通度、高能效的传感器网络。

To realize the high reliable communication and the wireless power transmission in the wireless underground sensor network,a new type of 2D honeycomb magneto-inductivenetwork was put forward at VLF band.The system model was established,and bandwidth,group velocity and beam forming technologies were researched based on the current dispersion equations.Simulation with Runge-Kutta method was carried out to verify the efficiency of the network.The result show that the omnidirectional propagation can be realized in the proposed honeycomb network with more balanced bandwidth and group velocity in every direction compared with the square lattice structure.Directional communication can also be realized based on the cooperative multi-antenna technology.The proposed honeycomb magneto-inductive network is very suitable to build wireless sensor networks with high connectivity and power efficiency in the underground environments.