Acoustically Actuated Magnetoelectric Antenna Arrays for VLF Radiation Enhancement

Magnetoelectric (ME) antennas have recently been demonstrated as a promising solution for very low frequency (VLF) communications, for their 2-3 orders of smaller dimensions and better immunity to electrical interferences than conventional electric antennas. Antenna arrays are widely used as an effe...

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Bibliographic Details
Published in2022 IEEE International Symposium on Phased Array Systems & Technology (PAST) pp. 1 - 4
Main Authors Dong, Cunzheng, He, Yifan, Jeong, Min-Gyo, Watson, William, Sanghadasa, Mohan, Sun, Nian X.
Format Conference Proceeding
LanguageEnglish
Published IEEE 11.10.2022
Subjects
acoustic resonator
antenna array
Antenna theory
Dipole antennas
magnetoelectric
Magnetoelectric effects
mechanical antenna
Phased arrays
Q-factor
Resonant frequency
Transmitting antennas
very low frequency
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Summary:Magnetoelectric (ME) antennas have recently been demonstrated as a promising solution for very low frequency (VLF) communications, for their 2-3 orders of smaller dimensions and better immunity to electrical interferences than conventional electric antennas. Antenna arrays are widely used as an effective approach to enhance radiation field intensity. In this work, a new type of ME antenna with high quality factor resonator is proposed to enhance the radiation field strength and efficiency for antenna arrays. By tunning all the driving signal for each antenna unit at the same frequency and in phase, the radiation field has been linearly increased with the number of antenna arrays. A total radiation field of 200 nT at 1m has been achieved using 12 antenna arrays, which is one order of magnitude enhancement than a single antenna unit. Furthermore, the estimation of antenna efficiency based on the theory of magnetic dipole indicates that ME antennas can potentially enhance the efficiency by a square law of the number of arrays. The demonstrated results and analysis provide the potential for taking advantage of large number of ME antenna arrays for far distance transmission in VLF communications.
DOI:10.1109/PAST49659.2022.9974986