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Smart meta-device powered by stray microwave energies: A green approach to shielding external interference and detection

Author

Listed:
  • Zhou, Yong Jin
  • Wu, Xiong Bin
  • Cai, Xiao Dong
  • Xu, Hong Xin
  • Li, Qiao Yu
  • Xiong, Wei
  • Xiao, Shi Yi
  • Cui, Tie Jun

Abstract

Protecting sensitive electronic devices from external stray microwaves is essential for a range of practical applications. Current shielding devices such as filters and frequency-selective surfaces are vulnerable to harmful signals at in-band frequencies due to their mechanisms relying on filtering out-of-band signals through frequency-selective responses. This study presents a smart meta-device powered by stray microwave energies, designed to autonomously shield against external interference and detection without the need for an external power supply or human intervention. Such meta-devices integrate reconfigurable meta-atom arrays and sensing-powering modules to form a sensing-powering-feedback closed-loop system. This enables real-time sensing of high-power microwaves and the automatic transition from high transmission to shielding or absorbing external harmful microwave energy. A prototype was fabricated, characterized, and demonstrated as a smart high-power microwave shielding device and adaptive stealth radome, operating between 6.0 GHz to 6.7 GHz. Unlike other smart/intelligent meta-devices, the proposed meta-device operates autonomously without external power supplies or complex microwave networks. This signifies a paradigm shift in electromagnetic shielding technology and represents a breakthrough in the development of autonomous, sustainable, and maintenance-free microwave devices.

Suggested Citation

  • Zhou, Yong Jin & Wu, Xiong Bin & Cai, Xiao Dong & Xu, Hong Xin & Li, Qiao Yu & Xiong, Wei & Xiao, Shi Yi & Cui, Tie Jun, 2025. "Smart meta-device powered by stray microwave energies: A green approach to shielding external interference and detection," Applied Energy, Elsevier, vol. 378(PA).
    • Handle: RePEc:eee:appene:v:378:y:2025:i:pa:s0306261924021536
    DOI: 10.1016/j.apenergy.2024.124770
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    References listed on IDEAS

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