Novel bending-mode antenna improves underwater communication, suggesting effective wireless capabilities in seawater.
In this study, a novel magnetoelectric (ME) antenna based on metglas/steel/piezo (MSP) is proposed to overcome attenuation in seawater. Many mechanical ME antennas use the length-stretching mode, and their radiation frequency is mostly concentrated at 10-20 kHz. The attenuation of electromagnetic (EM) fields in seawater is proportional to their frequency; therefore, their applications are limited. The converse magnetoelectric effect (CME) model of a bending-mode antenna was derived, and an equivalent circuit was developed based on the piezoelectric and magnetostrictive constitutive equations combined with the deflection equation. An MSP antenna with a volume of only 2.5 cm3 was successfully manufactured. Utilizing the elasticity and stiffness characteristics of the MSP antenna, the bending mode dominates. The MSP antenna radiation intensity at 1.21 kHz reaches 13.5 nTrms at 1 m in air, with a Q value of 25. Adequate underwater communication of the 2ASK at 300 bps over a distance of 40 cm was achieved. This experiment verifies the excellent wireless communication ability of the bending ME antenna in the air-seawater cross-medium and provides an innovative direction for underwater communication technology.
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Deng et al. (2025) studied this question.
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