Journal ArticleDOI
Recycling ambient microwave energy with broad-band rectenna arrays
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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
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Proceedings ArticleDOI
Electromagnetic energy harvesting in a head-mountable DBS device using a circular PIFA
TL;DR: In this article, a circular planar inverted-F antenna (PIFA) was designed and simulated at the industrial, scientific, and medical (ISM) band of 915 MHz for energy harvesting in a head-mountable deep brain stimulation device.
Journal ArticleDOI
Wireless sensor node remote supply using a compact stacked rectenna array with voltage multipliers at 2.45 GHz
TL;DR: In this article, a rectenna array for ambient RF energy harvesting on the 2.45 GHz ISM band is presented, which is composed of a stacked fractal antenna and an RF-to-dc conversion circuit.
Journal ArticleDOI
A Highly Efficient Rectenna Using Harmonic Rejection Capability
Youghwan Kim,Sungjoon Lim +1 more
TL;DR: In this article, a 2.4 GHz rectenna is designed using a harmonic rejection bandpass filter, which achieves a RF to DC conversion efficiency of 72.17 % when the received RF power is 63.09 mW.
Solar/Electromagnetic Energy Harvesting and Wireless Power Transmission This paper reviews numerous existing efforts and solutions in the field of solar and electromagnetic energy harvesting and wireless power transmission.
TL;DR: Novel topologies to minimize the sensitivity of rectifier circuits to variations in the received RF power levels are presented to synthesize autonomous wireless power transmission radio-frequency signal generators.
Proceedings ArticleDOI
Design of radio frequency energy harvesting system for an unmanned airplane
TL;DR: In this work, an RF energy harvesting system is described for the purpose of driving an unmanned airplane that will be capable of remote recharge and become a self-powered system.
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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