Open AccessA mechanically based magneto-inductive transmitter with electrically modulated reluctance
Author(s) -
Nathan Strachen,
John H. Booske,
Nader Behdad
Publication year - 2018
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0199934
Subject(s) - transmitter , magnet , magneto , wireless , electrical engineering , physics , modulation (music) , magnetic field , bandwidth (computing) , amplitude , underwater , nuclear magnetic resonance , acoustics , computer science , engineering , telecommunications , optics , channel (broadcasting) , quantum mechanics , oceanography , geology
Magneto-inductive (MI) communication is a viable technology for wireless communications in underwater and underground environments. In this paper, a new design for an MI transmitter is presented. Unlike conventional MI transmitters that utilize coiled loops or solenoids to generate magnetic fields, we demonstrate the feasibility and advantages of using a rotating permanent magnet. We also present and experimentally verify a modulation technique that does not involve changing the rotational speed of the magnet. By electrically changing the permeability of a surrounding shield, the fields from the rotating magnet are amplitude modulated. Our findings suggest that increased efficiency and bandwidth can be realized compared to conventional MI transmitters.