A Compact Magneto-Inductive Coil Antenna Design for Underwater Communications

Proceedings of the 12th International Conference on Underwater Networks & Systems Pub Date : 2017-11-06 DOI:10.1145/3148675.3148713

N. Gaoding, Jean-François Bousquet

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引用次数: 6

Abstract

Magnetic induction (MI) has shown a great potential for underwater communications due to its immunity to acoustic noise and low latency. However, the transmission distance of MI is limited since the magnetic field attenuates very fast in the near field. In this work, a magneto inductive antenna design is studied to achieve two modes of operation: 1) a static quasi omni-directional magnetic coupling; 2) a dynamic rotation of magnetic coupling. A design procedure is described to define the strength of the magnetic field, bandwidth (BW) and the path loss (PL) of the underwater communication link. Both modes are simulated and the corresponding antenna configurations are described. The proposed antenna has three coils separated between each other by 120 degrees. The coils have a radius of 5 cm and a length of 8 cm. The simulation results illustrate how this design can provide an omni-directional magnetic coupling and a more directional performance in the rotation mode. In the rotation mode, simulations also confirmed that the magnetic field can be controllable by changing the phases of input currents.

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一种用于水下通信的小型磁感线圈天线设计

磁感应技术具有抗噪声和低时延的特点，在水下通信中显示出巨大的潜力。然而，由于近场磁场衰减非常快，MI的传输距离受到限制。本文研究了一种磁感应天线的设计，以实现两种工作模式:1)静态准全向磁耦合;2)磁力联轴器的动态旋转。介绍了一种确定水下通信链路的磁场强度、带宽和路径损耗的设计方法。对两种模式进行了仿真，并描述了相应的天线结构。拟议的天线有三个线圈，彼此之间以120度分隔。线圈的半径为5厘米，长度为8厘米。仿真结果表明，该设计可以提供全向磁耦合，并在旋转模式下具有更强的方向性。在旋转模式下，仿真也证实了磁场可以通过改变输入电流的相位来控制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 12th International Conference on Underwater Networks & Systems

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