An Efficient Far-Field Wireless Power Transfer via Field Intensity Shaping Techniques

Abstract

Radiative (or far-field) energy replenishment for devices such as smartphones, laptops, robots, and small electric appliances paves the way to autonomous and continuous devices functioning, thus bypassing the need of operation interruptions, human maintenance activities, and replenishment by wired transformers. In this work, we investigate the feasibility of using a properly engineered antenna array able to deliver radiative power to devices in need of energy replenishment during their normal and unsupervised activity, whose locations are unknown. Both the case of single and multiple devices needing energy replenishment are addressed. A quantitative proof-of-concept study is carried out to validate the proposed approach. A 3D scenario is simulated to study the case of devices in need of energy replenishment within a standard office environment. Different antenna array configurations are investigated and the corresponding performances benchmarked against a standard installation of recharging antennas. Results confirm the outstanding capability of the proposed approach in terms of confinement and maximization of power transfer. Finally, in this framework, we also propose an efficient communication protocol that is able to manage multiple recharge demand given different operational rules.

Технологія Бездротової Передачі Енергії Та Області Її Застосування

“…The last part of the investigation digs into the more technical elements of WPT, such as large transmitter arrays and beamforming optimization. Although these facets have been explored by researchers such as Bevacqua et al [22], Hajimiri et al [25], and Kashyap et al [26], our work gives an interpretation of these notions that is more accessible, hence making them understandable to a wider audience.…”

“…It provides a safe and effective way to transmit electricity over great distances, which may help lessen the need for backup batteries. Solar-powered satellites in orbit may use LRWP technology to wirelessly transmit power to other satellites or spacecraft without wires or battery swaps [22].…”

A Review of Miniaturized Advanced IC Rectenna for Energy Harvesting Applications

“…Energy harvesting sources may be captured from the ambient environment or external [2]. Ambient Energy is the process by which energy is derived from external sources [3], such as solar energy [4], wind energy [5], thermal energy [6], vibrationsourced piezoelectric [7], and electromagnetic ambient signals which involve radio-frequency RF energy [8], near electromagnetic field [9], and far-field electromagnetic signals [10]. The constant source of energy harvesting is the sun which captures rays by using solar cells.…”

A Dual-Band Compact Integrated Rectenna for Implantable Medical Devices

“…Energy harvesting sources may be captured from the ambient environment or external [2]. Ambient energy is the process by which energy is derived from external sources [3], such as solar energy [4], wind energy [5], thermal energy [6], vibration-sourced piezoelectric [7], and electromagnetic ambient signals which involves radiofrequency RF energy [8], near electromagnetic field [9], and farfield electromagnetic signals [10]. The constant source of energy harvesting is the sun that captures rays by using solar cells.…”