Propagation Modeling of Point Source Excited Magnetoinductive Waves Based on a New Plane Wave Expansion Approach

被引:0
|
作者
Liu, Feng [1 ]
Zhang, Zhijun [2 ]
Zhu, Lianqing [1 ]
Liu, Yajun [3 ]
机构
[1] Beijing Informat Sci & Technol Univ, Beijing Key Lab Optoelect Measurement Technol, Beijing Engn Res Ctr Optoelect Informat & Instrum, Beijing 100192, Peoples R China
[2] Oregon Hlth & Sci Univ, Dept Biomed Engn, Beaverton, OR 97006 USA
[3] Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China
基金
中国国家自然科学基金;
关键词
THE-EARTH COMMUNICATIONS;
D O I
10.1155/2015/951718
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The signal fading in wireless underground sensor networks (WUSNs), which is caused by lossy media such as soil and sand, can be reduced by applying technology ofmagnetoinductive (MI) propagation. This technology can effectively establish a communication at very low frequency (VLF). In contrast to the previous studies in the literature, which mostly focus on the propagation of plane waves, we propose a new approach based on the plane wave expansion (PWE) to model the near field MI waves. The proposed approach is based on excitation of a point source, which is a common case in a practical WUSN. The frequent usage of square latticeMI structure is investigated. To verify the mathematical derivation, the simulation of time domain based on the fourth-order Runge-Kutta (RK) method is carried out. Simulation results show that the new model can provide a precise prediction to the MI wave's propagation, with the computation load being one-tenth of that of the time domain simulation. The characteristics of the propagation of the MI waves are presented and discussed. Finally, the reflection on the edge of the MI structure is reduced by analysing the terminal matching conditions and calculating a method for matching impedances.
引用
收藏
页数:9
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