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<p>Wireless sensing systems enable real-time, non-contact monitoring for next-generation intelligent platforms. Ideal wireless sensing systems feature compact, low power consumption, and long communication range. Here we report a miniaturized wireless sensing system with an integrated acoustic-resonance-driven piezoelectric microantenna (PE μ-antenna) with a 0.0196 mm<sup>2</sup> active area. The PE μ-antenna integrated on a film bulk acoustic resonator (FBAR) achieves dual-frequency radiation at 1.85 GHz and 3.91 GHz with gains of –32.96 dBi and –20.5 dBi, respectively. The μ-antennas achieve over four orders of magnitude radiation efficiency enhancement and volume reduction compared with existing piezoelectric transmitters. We further extend this approach to high-overtone bulk acoustic resonators with high quality factors for wireless sensing. The system enables temperature and strain sensing with a transmission range up to 1 m, demonstrating state-of-the-art miniaturization and transmission performance among wireless sensing systems. This work establishes a scalable platform for ultracompact wireless sensors and communication nodes in biomedical, wearable, and aerospace applications.</p>

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Multi-mode piezoelectric radiation-based microantennas and miniaturized wireless sensing unit driven by bulk acoustic waves

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月12日

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  • Xinyu Cai,
  • Rui Wan,
  • Rui Ding,
  • Jianhui Wu,
  • Jie Li,
  • Kaihang Zhang,
  • Jiaqi Lu,
  • Dinku Hazarika,
  • Liangquan Xu,
  • Jiafeng Ni,
  • Weipeng Xuan,
  • Yungui Ma,
  • Hao Jin,
  • Shurong Dong,
  • Jikui Luo

摘要

Wireless sensing systems enable real-time, non-contact monitoring for next-generation intelligent platforms. Ideal wireless sensing systems feature compact, low power consumption, and long communication range. Here we report a miniaturized wireless sensing system with an integrated acoustic-resonance-driven piezoelectric microantenna (PE μ-antenna) with a 0.0196 mm2 active area. The PE μ-antenna integrated on a film bulk acoustic resonator (FBAR) achieves dual-frequency radiation at 1.85 GHz and 3.91 GHz with gains of –32.96 dBi and –20.5 dBi, respectively. The μ-antennas achieve over four orders of magnitude radiation efficiency enhancement and volume reduction compared with existing piezoelectric transmitters. We further extend this approach to high-overtone bulk acoustic resonators with high quality factors for wireless sensing. The system enables temperature and strain sensing with a transmission range up to 1 m, demonstrating state-of-the-art miniaturization and transmission performance among wireless sensing systems. This work establishes a scalable platform for ultracompact wireless sensors and communication nodes in biomedical, wearable, and aerospace applications.