Magnetic Pendulum Arrays for Efficient Wireless Power Transmission

Nagaraja, Srinivas P. M.; Tok, Rüştü Umut; Zhu, Rui; Bland, Scott; Propst, A.; Wang, Y. E.

doi:10.1088/1742-6596/1407/1/012049

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…For example, Sun et al proposed a rotating shutter antenna that demonstrates indoor ultra-low frequency communication with a code rate of 12.5 bps [12]. Instead of using motors for magnet rotation, Mysore Nagaraja et al and Fereidoony et al placed permanent magnets in a pendulum array, employing external alternating current to stimulate their movement [13,14]. Among these three methods, the EMA is very sensitive to the temperature and humidity, which potentially affects its performance in different environmental condition.…”

Section: Introductionmentioning

confidence: 99%

A mechanical antenna for long-wave communication by integrating piezoelectric material and magnets

Wang,

Zhao,

Zhang

et al. 2024

Phys. Scr.

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The Chu's limit imposes a significant challenge for traditional antennas operating at extremely low frequencies, as they require a large size due to the long operating wavelength, thus limiting their applicability. To reduce the antenna size, this paper proposes a vibrating beam system for long-wave communication that leverages the inverse piezoelectric effect, vibration theory, and Maxwell's equations. A prototype utilizing beam structures is developed and examined experimentally. Furthermore, the frequency modulation of the vibrating beam system and signal transfer protocol are investigated in detail. The experimental results demonstrate that exciting different vibration modes of the vibrating beam system leads to varied electromagnetic signals in specific rules, enabling long-wave communications and ensuring confidentiality. This work offers valuable insights into the potential of local information exchange among close-range platforms. It also highlights the promising approach of integrating piezoelectric material and magnets within the vibrating beam system, showcasing their potential towards practical applications in long-wave communication.

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Section: Introductionmentioning

confidence: 99%

A mechanical antenna for long-wave communication by integrating piezoelectric material and magnets

Wang,

Zhao,

Zhang

et al. 2024

Phys. Scr.

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“…[15] However, both of the physical electret and magnet based mechanical antennas require motors to provide large inertial forces that make signal modulation challenging and result in low bandwidth. [3,17,21] Under these circumstances, Prasad et al proposed a portable electromechanical system called a Magnetic Pendulum Array. The system eliminates the motors by utilizing a coil to drive an array of magnetic pendulums in oscillatory motion.…”

Section: Introductionmentioning

confidence: 99%

“…[2,13,14] In contrast to the most widely used dipole antenna, mechanical antennas that function through the coupling of the electromagnetic field by using the mechanical movement of charge or magnetic dipole have gained prominence. [3,[15][16][17][18] One approach to achieve a mechanical antenna is to physically rotate or vibrate a permanent electret. It is worth noting that antennas based on the motor driven electret exhibits favorable extremely low frequency (0-200 Hz) band radioactive performance with significantly reduce of the size.…”

Section: Introductionmentioning

confidence: 99%

Magneto‐Mechano‐Electric Antenna for Portable VLF Transmission

Jiang

Liu

et al. 2023

Adv Elect Materials

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Wireless communication has always been an indispensable element in the modern information‐based society. Beyond the commercial electrical antenna, very low frequency (VLF) mechanical antennas have recently become research hotspot since their combination of miniaturization and favorable radiation efficiency in lossy electrically conductive environments. However, their usage is challenged due to the relatively limited radiation capability and modulation bandwidth. This study demonstrates an improved high‐efficiency magnetoelectric (ME) mechanical antenna based on the magneto‐mechano‐electric (MME) effect, realized via the synergistic effect of piezo‐driven magnets motion and converse magnetoelectricity (ME). Converse ME coefficient and radiation measurement show that the MME antenna demonstrates superior performance over a normal ME antenna. The oscillation magnet serves as an extra vibrating magnetic dipole besides the ME composite and thus brings radiation enhancement to the mechanical antenna. Furthermore, digital signal modulations are conducted with a VLF carrier signal to enable anti‐interference and anti‐attenuation communication. In view of the exemplary demonstration, the MME effect‐based antenna is expected to provide a new strategy for mechanical antenna improvement and shows tremendous potential for conductive environments communication applications.

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