Journal ArticleDOI
Recycling ambient microwave energy with broad-band rectenna arrays
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TLDR
In this article, a 64-element dual-circularly-polarized spiral rectenna array is designed and characterized over a frequency range of 2-18 GHz with single-tone and multitone incident waves.Abstract:
This paper presents a study of reception and rectification of broad-band statistically time-varying low-power-density microwave radiation. The applications are in wireless powering of industrial sensors and recycling of ambient RF energy. A 64-element dual-circularly-polarized spiral rectenna array is designed and characterized over a frequency range of 2-18 GHz with single-tone and multitone incident waves. The integrated design of the antenna and rectifier, using a combination of full-wave electromagnetic field analysis and harmonic balance nonlinear circuit analysis, eliminates matching and filtering circuits, allowing for a compact element design. The rectified dc power and efficiency is characterized as a function of dc load and dc circuit topology, RF frequency, polarization, and incidence angle for power densities between 10/sup -5/-10/sup -1/ mW/cm/sup 2/. In addition, the increase in rectenna efficiency for multitone input waves is presented.read more
Citations
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Optimum Antenna Characteristics for Maximally Harvesting Ambient RF Energy
TL;DR: In this article , the authors investigated the best antenna characteristics to harvest ambient RF waves maximally, including multi-polarization, multi-port, multiband, omnidirectional, quasi-isotropic, and non-quasiisotropic pattern options.
DissertationDOI
An ultra-low power voltage regulator system for wireless sensor networks powered by energy harvesting
TL;DR: In this article, Wang et al. proposed an ultra-low power voltage regulator system for wireless sensor networks powered by energy harvesting, which is composed of two switches and two regulators with different amounts of quiescent current consumption.
Proceedings ArticleDOI
Design and Optimization of High-efficiency Rectenna for RF Energy Harvesting
TL;DR: This work proposes an ultra-wideband antenna array allowing to harvest RF energy from different frequency bands, especially the most often exploited, such as 4G and Wi-Fi bands.
Peer ReviewDOI
Wireless Power Transfer and Energy Harvesting Using Metamaterials and Metasurfaces
Yi Huang,Jiafeng Zhou,Long Li +2 more
TL;DR: It is shown that metamaterials and metasurfaces can indeed achieve a higher RF to DC energy conversion efficiency and operational distance by changing the electromagnetic fields between the transmitter and receiver and/or making their reception less sensitive to incident wave angle and polarization.
References
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Journal ArticleDOI
The History of Power Transmission by Radio Waves
TL;DR: The history of power transmission by radiowaves is reviewed from Heinrich Hertz to the present time with emphasis upon the free-space microwave power transmission era beginning in 1958 as mentioned in this paper.
Journal ArticleDOI
Design and experiments of a high-conversion-efficiency 5.8-GHz rectenna
J.O. McSpadden,L. Fan,Kai Chang +2 more
TL;DR: In this paper, a high-efficiency rectenna element has been designed and tested at 5.8 GHz for applications involving microwave-power transmission, which achieves an RF-to-DC conversion efficiency of 82% at an input power level of 50 mW and 327 /spl Omega/ load.
Journal ArticleDOI
Theoretical and experimental development of 10 and 35 GHz rectennas
T.-W. Yoo,Kai Chang +1 more
TL;DR: In this paper, a 35 GHz rectenna with 39% conversion efficiency was developed using a microstrip dipole antenna and a commercially available mixer diode, which was demonstrated using this diode at 10 GHz.
Proceedings ArticleDOI
Performance limits of switched-capacitor DC-DC converters
M.S. Makowski,Dragan Maksimovic +1 more
TL;DR: In this paper, the theoretical performance limits of two-phase switched-capacitor (SC) DC-DC power converters are discussed and the complete set of attainable DC conversion ratios is found.
Book
Microwave Ring Circuits and Antennas
TL;DR: In this paper, the authors present an analysis and modeling of ring resonators modes and coupling methods, including ring couplers and waveguide ring cavities and filter ring antennas.
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Design and experiments of a high-conversion-efficiency 5.8-GHz rectenna
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