Radiofrequency energy harvesting system based on a rectenna array in urban environments

Milanezi J, Ferreira RS, Da Costa JPC, Del Galdo G, Miranda RK, Felber W, De Freitas EP (2017)

Publication Type: Conference contribution

Publication year: 2017

Publisher: Institute of Electrical and Electronics Engineers Inc.

Pages Range: 151-157

Conference Proceedings Title: Proceedings - International Conference on Signals and Systems, ICSigSys 2017

Event location: Bali, IDN

ISBN: 9781509067480

DOI: 10.1109/ICSIGSYS.2017.7967031

Abstract

Energy harvesting has become very attractive due to the extended usage time of devices. Among several forms of recycling energy, radiofrequency (RF) harvesting has been suggested due to its wide availability mainly in urban areas. Its applications range from sensor nodes to charging low power consumption portable devices and depend on the amount of antennas. In this paper, we evaluate the feasible application of RF harvesting for charging a cell phone. To validate our analysis, we conduct an RF measurement campaign at four important locations in Brasilia, Brazil. Considering the average incidence of 11 dBm, we achieve the final value of 2.5 mW/m2. With an incident power of +10 dBm, only 2 rectennas per hour are needed to charge a cell phone whose battery is approximately 3.72 mWh. We perform a comparison between rectenna arrays and simple antennas directly connected to one external matching circuit, dismissing adaptive beamforming circuits as a way of avoiding intermediate energy losses. In order to apply RF energy harvesting in higher power consumption devices, we propose a rectenna array system which increases considerably the amount of recycled power. For both Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS) paths, harvesting systems based on rectenna arrays outperform standard antenna array based solutions.

Involved external institutions

Universidade de Brasília BR Brazil (BR) Technische Universität Ilmenau DE Germany (DE) Fraunhofer-Institut für Integrierte Schaltungen (IIS) DE Germany (DE) Universidade Federal do Rio Grande do Sul (UFRGS) BR Brazil (BR)

How to cite

APA:

Milanezi, J., Ferreira, R.S., Da Costa, J.P.C., Del Galdo, G., Miranda, R.K., Felber, W., & De Freitas, E.P. (2017). Radiofrequency energy harvesting system based on a rectenna array in urban environments. In Proceedings - International Conference on Signals and Systems, ICSigSys 2017 (pp. 151-157). Bali, IDN: Institute of Electrical and Electronics Engineers Inc..

MLA:

Milanezi, Jayme, et al. "Radiofrequency energy harvesting system based on a rectenna array in urban environments." Proceedings of the 1st IEEE International Conference on Signals and Systems, ICSigSys 2017, Bali, IDN Institute of Electrical and Electronics Engineers Inc., 2017. 151-157.

BibTeX: Download