2017/06/30 by Philipp del Hougne, Mathias Fink, Geoffroy Lerosey · 20 citations
Engineering · Materials Science · Physics and Astronomy · #Acoustic Wave Phenomena Research #Energy (signal processing) #Energy harvesting #Field (mathematics) #Metamaterials and Metasurfaces Applications #Microwave #Nonlinear Photonic Systems #Nonlinear system #Scheme (mathematics) #Wireless #Wireless sensor network #physics.app-ph #physics.class-ph
paper · pdf · doi:10.1103/physrevapplied.8.061001
published in Physical Review Applied 8(6) (American Physical Society) · 6 pages, 4 figures
openalex created_date 2017/06/09 · arxiv created 2017/09/08 · openalex publication_date 2017/12/27 · arxiv updated 2018/01/03 · openalex updated_date 2026/08/06
The conceptual ``smart home'' features a multitude of sensors to monitor temperature, motion, humidity, etc. The prospect of wireless sensor powering via an ambient Wi-Fi field is enticing, but current methods to harvest this energy are too inefficient. The authors show that a simple, clever control scheme for indoor Wi-Fi reverberation can concentrate the waves on a harvesting device, drastically increasing energy collection. Also, the harvester's natural re-emission of specific signals during collection can be exploited, for focusing without direct access to the device. Such indirect, unsolicited, blind feedback might be useful in other fields, too, such as telecommunications.