Frequency-Self-Adaptive Radio Frequency Power Harvester Enabled by Shape-Reconfigurable Liquid Metal

• Published in: Electromagnetic science (Print) Vol. 2; no. 2; pp. 1 - 13
• Main Authors: Zhang, Cheng, Wang, Yuchao, Zhu, Zebin, Lin, Hai, Wang, Kun, Shi, Xintong, Du, Yi, Song, Chaoyun, Ren, Long, Cheng, Qiang
• Format: Journal Article
• Language: English
• Published: State Key Laboratory of Radio Frequency Heterogeneous Integration,College of Electronics and Information Engineering,Shenzhen University,Shenzhen 518000,China%State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,International School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430000,China%State Key Laboratory of Millimeter Waves,Southeast University,Nanjing 210096,China 01.06.2024; Key Laboratory of Materials for High-Power Laser,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China; Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China%College of Physical Science and Technology,Central China Normal University,Wuhan 430000,China%Center of Quantum and Matter Science and School of Physics,Beihang University,Beijing 100191,China%Department of Engineering,King's College London,London WC2R 2LS,UK; Chinese Institute of Electronics
• Subjects: broadband rectification; frequency-self-adaptive; liquid metal; radio frequency power harvesting; Liquid metal; Frequency-self-adaptive; Broadband rectification; Radio frequency power harvesting
• ISSN: 2836-9440; 2836-8282
• DOI: 10.23919/emsci.2024.0008

Radio frequency(RF)energy harvester as an efficient tool for capturing and converting the flourishing ambient RF energy provides a promising solution for long-term powering the wireless sensor networks and the Internet of things(IoTs).However,the actual distribution of the environmental RF signals is dynamically frequency-dependent due to the diverse wireless terminals only interacting with specified frequencies.To take full advantage of the RF energy carrying this characteristic,an intelligent RF energy harvester is in demand to automatically sense the frequency information of an incident signal and conduct the corresponding RF-to-direct current transformation process.Here,to the best of my knowledge,a frequency-self-adaptive RF harvester is first pre-sented with the help of the shape-reconfigurable liquid metal,which can precisely identify and efficiently convert an arbitrary signal from the frequency span of 1.8 to 2.6 GHz.Companied with a microcontroller unit and a tensile system,the dynamic functionality of the entire system is comprehensively demonstrated,showing promising potential to significantly advance various fields,including sustainable IoT applications,green wearable technologies,and self-powered devices.