A very low frequency (VLF) antenna based on clamped bending-mode structure magnetoelectric laminates

Lizhi Hu; Qianshi Zhang; Hanzhou Wu; Haoran You; Jie Jiao; Haosu Luo; Yaojin Wang; Chungang Duan; Anran Gao

doi:10.1088/1361-648X/ac8403

A very low frequency (VLF) antenna based on clamped bending-mode structure magnetoelectric laminates

J Phys Condens Matter. 2022 Aug 4;34(41). doi: 10.1088/1361-648X/ac8403.

Authors

Lizhi Hu¹, Qianshi Zhang¹, Hanzhou Wu², Haoran You², Jie Jiao³, Haosu Luo³, Yaojin Wang², Chungang Duan¹, Anran Gao¹

Affiliations

¹ Key Laboratory of Polar Materials and Devices(MOE), Department of Electronics, East China Normal University, Shanghai 200241, People's Republic of China.
² School of Material Science & Engineering, Nanjing University of Science & Technology, Nanjing 210094, People's Republic of China.
³ Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 201899, People's Republic of China.

PMID: 35878598
DOI: 10.1088/1361-648X/ac8403

Abstract

As the development of wireless communication devices tends to be highly integrated, the miniaturization of very low frequency (VLF) antenna units has always been an unresolved issue. Here, a novel VLF mechanical communication antenna using magnetoelectric (ME) laminates with bending-mode structure is realized. ME laminates combines magnetostrictive Metglas amorphous ribbons and piezoelectric 0.7Pb(Mg_1/3Nb_2/3)O₃-0.3PbTiO₃single crystal plates. From the simulation, we confirmed that the ME laminates can reduce the resonance peak from 18 kHz to 7.5 kHz by bending-mode structure. Experiment results show the resonance frequency can be farther reduced to 6.3 kHz by clamping one end of the ME antenna. The ME laminate exhibits a giant converse ME coefficient of 6 Oe cm V^-1at 6.3 kHz. The magnetic flux density generated by the ME antenna has been tested along with distance ranging from 0 to 60 cm and it is estimated that a 1 fT flux could be detected around 100 m with an excitation power of 10 mW.

Keywords: bending-mode structure; electromechanical resonance frequency; magnetoelectric antenna; magnetoelectric effect.