A Mechanical Transmitter for Undersea Magnetic Induction Communication

Liu, Yu; Gong, Sen; Liu, Qian; Hou, Muyu

doi:10.1109/tap.2021.3070657

Cited by 28 publications

(7 citation statements)

References 23 publications

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“…To evaluate the radiation characteristics of mechanical antennas, theoretical studies have been conducted in the literature from different perspectives [7][8][9][10][11][12]. In the form of mechanical motions, the rotating mechanical antenna can achieve two times the radiated power output of the vibrating mechanical antenna [13].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Spatial Distribution of Molecular Magnetic Moments on the Radiation Characteristics of Rotating Permanent Magnet Antennas

Li,

Meng

2024

PIER Letters

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Taking into account the radiation characteristics of rotating permanent magnet antennas, the influence of the spatial distribution of molecular magnetic moments on the radiation characteristics was verified by performing theoretical calculations and simulations. First, the magnetic field distribution of arbitrarily shaped permanent magnets was derived based on the Biot-Savart Law, and the concentration degree of the molecular magnetic moments to the connection of the two magnetic poles and the comprehensive performance evaluation index were defined. The theoretical model to analyze the performance of permanent magnets was also established as above. Second, by controlling volume and rotational inertia to be the same, three types of permanent magnets were calculated. Finally, the optimization design process was proposed. Three preferable solutions were systematically compared and analyzed taking radially magnetized cylindrical permanent magnets as an example. Our work provides valuable insights into the design of mechanical antenna radiation sources. FIGURE 1.An arbitrarily shaped permanent magnet. PERFORMANCE EVALUATION MODELING Arbitrarily Shaped Permanent MagnetsAs shown in Figure 1, a three-dimensional right-angle coordinate system was constructed with the center of mass of an arbi-71

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Section: Introductionmentioning

confidence: 99%

Influence of the Spatial Distribution of Molecular Magnetic Moments on the Radiation Characteristics of Rotating Permanent Magnet Antennas

Li,

Meng

2024

PIER Letters

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“…ELF spinning permanent magnet transmitters were demonstrated in Refs. [ [7] , [8] , [9] , [10] ]. Efficient modulation techniques for spinning permanent magnet were also explored in Ref.…”

Section: Introductionmentioning

confidence: 99%

An ultra-compact mechanical antenna based on PTFE highly charged electret for extremely low frequency communications

Zhang,

Wang,

Cao

et al. 2024

Heliyon

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“…Recently, mechanical antennas (MAs) have been proposed as a potential solution to improve the low-frequency emitting efficiency and tackle miniaturization concerns. [5] MAs are implemented into low-frequency communication systems through multiple approaches, including the permanent magnet rotation type, [6][7][8][9][10][11] piezoelectric/electret type, [12][13][14][15] and piezoelectric driving poled ferromagnetic type. [16][17][18][19][20][21][22][23] The MA based on rotating permanent magnet has a high power consumption due to its nondirect driving method; the piezoelectric/electret type manifests a weak radiation capability, and it is unsuitable for ELF/SLF magnetic field transmitting.…”

Section: Introductionmentioning

confidence: 99%

A High‐Q Electric‐Mechano‐Magnetic Coupled Resonator for ELF/SLF Cross‐Medium Magnetic Communication

Chang,

He,

et al. 2023

Advanced Materials

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Extremely/super low frequency (ELF/SLF) electromagnetic wave can effectively propagate in the harsh cross‐medium environment where a high‐frequency electromagnetic wave cannot pass due to the fast decay. For efficiently transmitting a strong ELF/SLF radiation signal, the traditional electromagnetic antenna requires a super‐large loop (>10 km). To address this issue, in this work, a piezoelectric ceramic/ferromagnetic heterogeneous structured, cantilever beam‐type electric‐mechano‐magnetic coupled resonator at only centimeter scale for ELF/SLF cross‐medium magnetic communication is reported. Through designing hard‐soft hybrid step‐stiffness elastic beam, the resonator exhibits a much higher quality factor Q (≈240) for ELF/SLF magnetic field transmitting, which is one to five orders of magnitude higher than those of previously reported mechanical antennas and loop coil antennas. Moreover, the resonator exhibits a 5000 times higher magnetic field emitting efficiency compared to a conventional loop coil antenna in ELF/SLF band. It also demonstrates a 200% increase in magnetic field emitting capacity compared to existing piezoelectric‐driven antennas. In addition, an ASK+PSK modulation method is proposed for suppressing relaxation time of the resonator, and a reduction in the relaxation time by 80% is observed. Furthermore, an air–seawater cross‐medium magnetic field communication is successful demonstrated, indicating its potential as portable, high‐efficient antenna for underwater and underground communications.

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A Mechanical Transmitter for Undersea Magnetic Induction Communication

Cited by 28 publications

References 23 publications

Influence of the Spatial Distribution of Molecular Magnetic Moments on the Radiation Characteristics of Rotating Permanent Magnet Antennas

Influence of the Spatial Distribution of Molecular Magnetic Moments on the Radiation Characteristics of Rotating Permanent Magnet Antennas

An ultra-compact mechanical antenna based on PTFE highly charged electret for extremely low frequency communications

A High‐Q Electric‐Mechano‐Magnetic Coupled Resonator for ELF/SLF Cross‐Medium Magnetic Communication

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