Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, UK.
Canadian Nuclear Laboratories, Chalk River, ON, K0J 1J0, Canada.
Sci Rep. 2021 Apr 7;11(1):7679. doi: 10.1038/s41598-021-85838-7.
The capability of magnetic induction to transmit signals in attenuating environments has recently gained significant research interest. The wave aspect-magnetoinductive (MI) waves-has been proposed for numerous applications in RF-challenging environments, such as underground/underwater wireless networks, body area networks, and in-vivo medical diagnosis and treatment applications, to name but a few, where conventional electromagnetic waves have a number of limitations, most notably losses. To date, the effects of eddy currents inside the dissipative medium have not been characterised analytically. Here we propose a comprehensive circuit model of coupled resonators in a homogeneous dissipative medium, that takes into account all the electromagnetic effects of eddy currents, and, thereby, derive a general dispersion equation for the MI waves. We also report laboratory experiments to confirm our findings. Our work will serve as a fundamental model for design and analysis of every system employing MI waves or more generally, magnetically-coupled circuits in attenuating media.
磁感应在衰减环境中传输信号的能力最近引起了广泛的研究兴趣。波的方面-磁电感（MI）波-已经被提出用于许多射频挑战环境中的应用，例如地下/水下无线网络、身体区域网络以及体内医疗诊断和治疗应用等，仅举几例，在这些应用中，传统的电磁波存在许多局限性，最明显的是损耗。迄今为止，耗散介质内部涡流的影响尚未得到分析。在这里，我们提出了一种在均匀耗散介质中耦合谐振器的综合电路模型，该模型考虑了涡流的所有电磁效应，并由此推导出 MI 波的一般色散方程。我们还报告了实验室实验来证实我们的发现。我们的工作将成为每个采用 MI 波或更一般地说，在衰减介质中磁耦合电路的设计和分析的基本模型。
