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A wearable, ultrasonically-actuated magnetic-dipole rotating resonator for mobile communication in cross-medium environment

Author

Listed:
  • Zhi Cheng

    (Shenzhen University
    Wuhan University of Technology
    Peking University)

  • Xiangyi Wang

    (Shenzhen University)

  • Xiangmeng Lv

    (Shenzhen University)

  • Jianming Sun

    (Harbin Engineering University)

  • Zhaoqiang Chu

    (Harbin Engineering University)

  • Jing Zhou

    (Wuhan University of Technology)

  • Shuxiang Dong

    (Peking University)

Abstract

Traditional MHz and GHz electromagnetic antennas face challenges of high attenuation rate in cross-medium communication; while mechanical antennas are hindered by their large size, high energy consumption and weak radiation capacity. Here, we report a centimeter-scale, wearable ultrasonically-actuated magnetic-dipole rotating resonator (UA-MDRR) for efficient extremely low frequency (ELF) electromagnetic wave transmission in extreme environments. The UA-MDRR employs a small multilayer piezoelectric ceramic (0.11 cm³) to rotate a disc-type NdFeB magnet, generating ELF radiation through an electro-mechanical-magnetic (EMM) coupling effect. This device achieves a high emission capacity of 24,000 nT/cm³@1 m, outperforming the state-of-the-art resonators/antennas by one to two orders of magnitude. It can emit a magnetic field strength of 2.64 pT in air and 2.12 pT underwater at 100 m, respectively, while consuming only 0.61 W of power. This innovation represents a groundbreaking advancement in cross-medium communication, offering a mobile wearable device for emergency communication in seawater for life saving.

Suggested Citation

  • Zhi Cheng & Xiangyi Wang & Xiangmeng Lv & Jianming Sun & Zhaoqiang Chu & Jing Zhou & Shuxiang Dong, 2025. "A wearable, ultrasonically-actuated magnetic-dipole rotating resonator for mobile communication in cross-medium environment," Nature Communications, Nature, vol. 16(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-59539-y
    DOI: 10.1038/s41467-025-59539-y
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