Results 1 to 10 of about 4,722,607 (293)

Terrestrial Microwave Power Beaming [PDF]

IEEE Journal of Microwaves, 2022
This paper establishes the practicality of terrestrial microwave power beaming at distances >1 km. To beam microwave power along the surface of the earth, it is necessary to consider and, where possible, exploit the effects of microwave propagation ...
Christopher T. Rodenbeck, Brian B. Tierney, James Park, Mark G. Parent, Christopher B. DePuma, Chandler J. Bauder, Thomas J. Pizzillo, Paul I. Jaffe, Brian H. Simakauskas, Trevor Mayhan   +9 more
doaj   +4 more sources

Microwave and Millimeter Wave Power Beaming

IEEE Journal of Microwaves, 2021
Power beaming is the efficient point-to-point transfer of electrical energy across free space by a directive electromagnetic beam. This paper clarifies the basic principles of power beaming in simple terms, and proposes a benchmarking methodology for ...
Christopher T. Rodenbeck, Paul I. Jaffe, Bernd H. Strassner II, Paul E. Hausgen, James O. McSpadden, Hooman Kazemi, Naoki Shinohara, Brian B. Tierney, Christopher B. DePuma, Amanda P. Self   +9 more
doaj   +3 more sources

A wireless power beaming system using Y shaped reflectarray and rectenna achieving 8.33% power transfer efficiency [PDF]

Scientific Reports
In this paper, the design and implementation of a wireless power transfer system using an ultrawideband (UWB) circularly polarized multilayer reflectarray antenna (RA) is proposed.
Sunanda Roy, Nabanita Saha, Ifana Mahbub
doaj   +2 more sources

Dynamic Wireless Power Transfer for Cost-Effective Wireless Sensor Networks Using Frequency-Scanned Beaming

IEEE Access, 2019
A simple adaptive 1-D frequency-scanning method is proposed for radiative wireless power transfer (WPT) systems in low-power wireless sensor networks (WSNs).
Miguel Poveda-Garcia, Jorge Oliva-Sanchez, Ramon Sanchez-Iborra, David Canete-Rebenaque, Jose Luis Gomez-Tornero   +4 more
doaj   +3 more sources

Large-Scale Sequentially-Fed Array Antenna Radiating Flat-Top Beam for Microwave Power Transmission to Drones

IEEE Journal of Microwaves, 2022
Power beaming is one of the core technologies for microwave power transmission (MPT) systems. Effective plane-to-plane power beaming requires not only high point-to-point efficiency but also appropriately-shaped beam to extract the best performance of ...
Nobuyuki Takabayashi, Katsumi Kawai, Mizuki Mase, Naoki Shinohara, Tomohiko Mitani   +4 more
doaj   +1 more source

Onset of Quantum-Confined Stark Effects in Multijunction Photovoltaic Laser Power Converters Designed with Thin Subcells

Photonics, 2023
Photovoltaic multijunction power-converting III–V semiconductor devices generate electrical power from the optical energy of laser beams. They exhibit conversion efficiencies reaching values greater than 60% and 50% for the GaAs and the InP material ...
Simon Fafard, Denis Masson
doaj   +1 more source

Vertical Multi-Junction Laser Power Converters with 61% Efficiency at 30 W Output Power and with Tolerance to Beam Non-Uniformity, Partial Illumination, and Beam Displacement

Photonics, 2023
Stable and reliable optical power converting devices are obtained using vertical multi-junction laser power converters. They are based on the GaAs and the InP material systems and are used for power-over-fiber or power-beaming applications.
Simon Fafard, Denis Masson
doaj   +1 more source

Power and Spectral Range Characteristics for Optical Power Converters

Energies, 2021
High-performance optical power converters (OPCs) enable isolated electrical power and power beaming applications at new wavelengths and higher output powers.
Simon Fafard, Denis Masson, Jan-Gustav Werthen, James Liu, Ta-Chung Wu, Christian Hundsberger, Markus Schwarzfischer, Gunther Steinle, Christian Gaertner, Claudio Piemonte, Bernd Luecke, Josef Wittl, Martin Weigert   +12 more
doaj   +1 more source

74.7% Efficient GaAs-Based Laser Power Converters at 808 nm at 150 K

Photonics, 2022
High-efficiency multijunction laser power converters are demonstrated for low temperature applications with an optical input at 808 nm. The photovoltaic power converting III-V semiconductor devices are designed with GaAs absorbing layers, here with 5 ...
Simon Fafard, Denis P. Masson
doaj   +1 more source

High-Efficiency and High-Power Multijunction InGaAs/InP Photovoltaic Laser Power Converters for 1470 nm

Photonics, 2022
The high-efficiency capabilities of multijunction laser power converters are demonstrated for high-power applications with an optical input of around 1470 nm. The InP-based photovoltaic power converting III-V semiconductor devices are designed here, with
Simon Fafard, Denis P. Masson
doaj   +1 more source