Energy harvesting from ambient RF sources

Kitazawa, Shoichi; Ban, Hiroshi; Kobayashi, Kiyoshi

doi:10.1109/imws.2012.6215815

Cited by 71 publications

(32 citation statements)

References 5 publications

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“…The rectenna RF to DC efficiency is a function of the incident power and frequency of operation as well as the topology chosen. A variety of rectenna designs reported in the literature achieved RF to DC efficiencies between <10% [4,5,20] and up to 40% [2] for the ambient energy densities available in practice for a variety of frequency bands. A single, optimistic value for the conversion efficiency of 50% -assuming that rectenna technology will advance -is chosen here as this simplification allows that the measured ambient energy densities are quantified into useful harvestable energy.…”

Section: Consumption Of Low-power Electronic Devices and Estimated Hamentioning

confidence: 99%

Ambient RF energy harvesting trial in domestic settings

Mimis

Gibbins

Dumanlı

et al. 2015

IET Microwaves, Antennas & Propagation

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This study investigates the feasibility of ambient radio frequency (RF) energy harvesting for powering low-power electronic devices, in domestic environments. An RF spectrum survey was carried out in a variety of locations around the city of Bristol, UK between 500 MHz and 6 GHz. Locations are limited to indoor residential environments, and as a comparison an office. The measurement setup consists of an omnidirectional, broadband, discone antenna and a handheld spectrum analyser. On the basis of the measured power consumption of a number of low-power electronic devices and the analysed results, the required harvesting time to power each device is calculated. The results show that in order to harvest enough energy to power-up a small calculator (2 μW) for 1 s, an antenna array covering 1.7-2.5 GHz with effective area of 1 m 2 requires on average about 10 min of harvesting.

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Section: Consumption Of Low-power Electronic Devices and Estimated Hamentioning

confidence: 99%

Ambient RF energy harvesting trial in domestic settings

Mimis

Gibbins

Dumanlı

et al. 2015

IET Microwaves, Antennas & Propagation

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“…3. Dickson charge-pump and other styles of voltage mulitplying diode ladder circuits are sometimes used in rectennas to produce higher output voltage levels from the RF-DC rectification [6,8,9]. The concept is straightforward: using capacitors and diodes aligned together, the voltage is multiplied with each "rung" of the ladder.…”

Section: A Rectenna Designmentioning

confidence: 99%

“…yielding below -20dBm at the feedpoint of a half-wavelength, 6dBi gain patch antenna [3]. Harvesting energy from ambient WiFi has been the subject of several recent investigations [4][5][6][7]. The typical solution includes rectification of the RF power incident on an antenna into DC charge on a capacitor.…”

Section: Introductionmentioning

confidence: 99%

A 2.4GHz ambient RF energy harvesting system with −20dBm minimum input power and NiMH battery storage

Gudan

Chemishkian

Hull

et al. 2014

2014 IEEE RFID Technology and Applications Conference (RFID-TA)

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We describe a radio frequency (RF) energy harvester and power management circuit that trickle charges a battery from incident power levels as low as -20dBm. We designed the harvester for the 2.4 GHz RF band to leverage the ubiquity of energy that is produced by Wi-Fi, Bluetooth, and other devices. This paper reports on the design and current status of the harvester and compares our performance to other published results. In this incident power regime, rectified voltages are low, so power management circuit operation in the 100mV regime is critical. This paper describes a novel rectenna design, boost converter, and battery charger for RF energy harvesting specifically tuned to this low-power regime. At -20dBm RF input power, the harvesting system (rectenna, boost converter, and battery charger) sources 5.8µJ into a rechargeable battery after 1 hour.

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“…For wearable wireless communication systems and RF-ID applications, there has been a great interest in wireless power transmission (WPT) [1,2,3,4]. The rectifying circuit, denoted as "rectenna" in this paper, comprised of the radio frequency to direct current conversion circuit is one of the most important components to realize these systems.…”

Section: Introductionmentioning

confidence: 99%

High efficiency mw-band dielectric resonator rectenna using distributed capacitors

Honda

Yamashita

2016

IEICE ComEX

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This paper presents experimental studies on the improvement of RF-DC conversion efficiency of the rectenna using a high Q λ/4-coaxial dielectric resonator and distributed capacitors at 850 MHz. In order to achieve an ultimate efficiency, we have constructed a rectenna using both a coaxial dielectric resonator and a film capacitor. The measured results show that the developed rectenna has an RF-DC conversion efficiency of 76.2% and 44.1% at a low input power of 1 mW and 0.1 mW that achieves the 20%-efficiency improvement compared with the rectenna with an LC resonator. Keywords: rectenna, dielectric resonator, quality factor, distributed capacitor Classification: Transmission Systems and Transmission Equipment for Communications References

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Energy harvesting from ambient RF sources

Cited by 71 publications

References 5 publications

Ambient RF energy harvesting trial in domestic settings

Ambient RF energy harvesting trial in domestic settings

A 2.4GHz ambient RF energy harvesting system with −20dBm minimum input power and NiMH battery storage

High efficiency mw-band dielectric resonator rectenna using distributed capacitors

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Energy harvesting from ambient RF sources

Cited by 71 publications

References 5 publications

Ambient RF energy harvesting trial in domestic settings

Ambient RF energy harvesting trial in domestic settings

A 2.4GHz ambient RF energy harvesting system with &#x2212;20dBm minimum input power and NiMH battery storage

High efficiency mw-band dielectric resonator rectenna using distributed capacitors

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A 2.4GHz ambient RF energy harvesting system with −20dBm minimum input power and NiMH battery storage