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

作者：Hu, Lizhi; Zhang, Qianshi; Wu, Hanzhou; You, Haoran; Jiao, Jie; Luo, Haosu; Wang, Yaojin; Duan, Chungang; Gao, Anran^*

来源：Journal of Physics Condensed Matter, 2022, 34(41): 414002.

DOI：10.1088/1361-648X/ac8403

• magnetoelectric effect
• electromechanical resonance frequency
• magnetoelectric antenna
• bending-mode structure

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(Mg1/3Nb2/3)O-3-0.3PbTiO(3) single 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-1 at 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.

• 单位
  Chinese Academy of Science; Nanjing University of Science and Technology