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

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

Applied Energy, 2025, vol. 378, issue PA, No S0306261924021536

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.

Keywords: Meta-device; Reconfigurable meta-atom arrays; Stray microwave energies; Autonomous interference shielding (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1016/j.apenergy.2024.124770

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