TY - GEN
T1 - Near-Field Wireless Power Transfer with Dynamic Metasurface Antennas
AU - Zhang, Haiyang
AU - Shlezinger, Nir
AU - Guidi, Francesco
AU - Dardari, Davide
AU - Imani, Mohammadreza F.
AU - Eldar, Yonina C.
N1 - Funding Information:
This work was sponsored in part by the European Union’s H2020 research and innovation program under grant No. 101000967, in part by the Air Force Office of Scientific Research under grant No. FA9550-18-1-0208, in part by the Israel Science Foundation under grant No. 0100101, and in part by the project “Dipartimenti di Eccellenza” - DEI, University of Bologna. H. Zhang and Y. C. Eldar are with the Faculty of Math and CS, Weizmann Institute of Science, Rehovot, Israel (e-mail: {haiyang.zhang; yonina.eldar}@weizmann.ac.il). N. Shlezinger is with the School of ECE, Ben-Gurion University, Beer-Sheva, Israel (e-mail: nirshl@bgu.ac.il). F. Guidi is with the National Research Council of Italy, Institute of Electronics, Computer and Telecommunication Engineering, Bologna, Italy (e-mail: francesco.guidi@ieiit.cnr.it). D. Dardari is with the Department of Electrical, Electronic, and Information Engineering “Guglielmo Marconi” - DEI-CNIT, University of Bologna, Cesena, Italy (e-mail:davide.dardari@unibo.it). M. F. Imani is with the School of ECEE, Arizona State University, Tempe, AZ (email: mohammadreza.imani@asu.edu).
Funding Information:
This work was sponsored in part by the European Union's H2020 research and innovation program under grant No. 101000967, in part by the Air Force Office of Scientific Research under grant No. FA9550-18-1-0208, in part by the Israel Science Foundation under grant No. 0100101, and in part by the project Dipartimenti di Eccellenza - DEI, University of Bologna
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Radio frequency wireless power transfer (WPT) enables charging low-power mobile devices without relying on wired infrastructure. Current existing WPT systems are typically designed assuming far-field propagation, where the radiated energy is steered in given angles, resulting in limited efficiency and possible radiation in undesired locations. When large arrays at high frequencies, such as dynamic metasurface antenna (DMA), are employed, WPT might take place in the radiating nearfield (Fresnel) region where spherical wave propagation holds, rather than plane wave propagation as in the far-field. In this paper, we study WPT systems charging multiple devices in the Fresnel region, where the energy transmitter is equipped with an emerging DMA, exploring how the antenna configuration can exploit the spherical wavefront to generate focused energy beams. In particular, after presenting a mathematical model for DMA-based radiating near-field WPT systems, we characterize the weighted sum-harvested energy maximization problem of the considered system, and we propose an efficient solution to jointly design the DMA weights and digital precoding vector. Simulation results show that our design generates focused energy beams that are capable of improving energy transfer efficiency in the radiating near-field with minimal energy pollution.
AB - Radio frequency wireless power transfer (WPT) enables charging low-power mobile devices without relying on wired infrastructure. Current existing WPT systems are typically designed assuming far-field propagation, where the radiated energy is steered in given angles, resulting in limited efficiency and possible radiation in undesired locations. When large arrays at high frequencies, such as dynamic metasurface antenna (DMA), are employed, WPT might take place in the radiating nearfield (Fresnel) region where spherical wave propagation holds, rather than plane wave propagation as in the far-field. In this paper, we study WPT systems charging multiple devices in the Fresnel region, where the energy transmitter is equipped with an emerging DMA, exploring how the antenna configuration can exploit the spherical wavefront to generate focused energy beams. In particular, after presenting a mathematical model for DMA-based radiating near-field WPT systems, we characterize the weighted sum-harvested energy maximization problem of the considered system, and we propose an efficient solution to jointly design the DMA weights and digital precoding vector. Simulation results show that our design generates focused energy beams that are capable of improving energy transfer efficiency in the radiating near-field with minimal energy pollution.
KW - Radiating near-field
KW - beam focusing
KW - dynamic metasurface antennas
KW - wireless power transfer
UR - http://www.scopus.com/inward/record.url?scp=85136077106&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85136077106&partnerID=8YFLogxK
U2 - 10.1109/SPAWC51304.2022.9833917
DO - 10.1109/SPAWC51304.2022.9833917
M3 - Conference contribution
AN - SCOPUS:85136077106
T3 - IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
BT - 2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication, SPAWC 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 23rd IEEE International Workshop on Signal Processing Advances in Wireless Communication, SPAWC 2022
Y2 - 4 July 2022 through 6 July 2022
ER -