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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Circuit Analysis of Series and Shunt Rectifier Topologies for RF Energy Harvesting Applications at 5.80 GHz
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Energy Harvesting by Scavenging Ambient Radio Frequency Signals
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References
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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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