A Multi-Band Stacked RF Energy Harvester With RF-to-DC Efficiency Up to 84%

Kuhn, Véronique; Lahuec, Cyril; Seguin, Fabrice; Person, Christian

doi:10.1109/tmtt.2015.2416233

Cited by 308 publications

(161 citation statements)

References 26 publications

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“…RF energy‐harvesting circuits and techniques have been studied in the recent years . However, most previous designs are based on dedicated RF sources.…”

Section: Introductionmentioning

confidence: 99%

“…As expected, DTV, GSM900, GSM1800, and 3G were identified as potential bands for RF energy harvesting due to its high‐power densities in urban settings. A four‐band rectenna operating in the bands of GSM 900, GSM 1800, UMTS, and Wi‐Fi was designed in to result in an output of 406 mV obtained during outdoor measurement. Meanwhile, a harvester located 50 m from a cellular tower gathered a measured output voltage of 250‐300 mV was in using a broadband RF harvester in ambient environment.…”

Section: Introductionmentioning

confidence: 99%

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A compact dual‐band rectenna for ambient RF energy harvesting

Adam

Yasin

Rahim

et al. 2018

Micro & Optical Tech Letters

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A compact broadband ambient RF energy harvester operating from 1800 MHz up to 2.5 GHz is proposed in this paper. This work is motivated by the huge amount of free and continuously available RF energy in the surroundings that can be utilized into useable energy. Harvest performance is investigated using two antennas in this work, a circular polarized and an array antenna. Due to low ambient power densities, a multistage rectifier is utilized to improve the output dc voltage of the proposed system. Measurements indicate the system is capable of harvesting up to 1.8 Vdc output from nondedicated ambient RF energy sources in an urban area, which is significant in the absence of other energy sources.

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“…RF energy‐harvesting circuits and techniques have been studied in the recent years . However, most previous designs are based on dedicated RF sources.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A compact dual‐band rectenna for ambient RF energy harvesting

Adam

Yasin

Rahim

et al. 2018

Micro & Optical Tech Letters

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“…The comparison is made with others RF energy harvesting systems which used input powers approximately −50 dBm to 0 dBm. By comparing the RF-to-DC efficiency of the proposed harvesting system to the stated previous research, work in [19] has the highest efficiency. However, the result was obtained using −10 dBm input power.…”

Section: Harvesting System Performance Comparisonmentioning

confidence: 89%

A Power Processing Circuit for Indoor Wi-Fi Energy Harvesting for Ultra-Low Power Wireless Sensors

Kadir

2017

Applied Sciences

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This article proposes a complete power processing circuit for an indoor 2.45 GHz Wi-Fi energy harvesting system. The proposed power processing circuit works by using power harvested from indoor Wi-Fi transmitters. The overall system of this work is simplified as an equivalent circuit and analyzed mathematically. A two-port network is analyzed in formulating the relevant equations of the equivalent circuit. The importance of matching the impedance of a harvesting antenna to the rectifier circuit is highlighted by using simulation analysis, and it is shown that the impedance matching for both components has satisfied the conditions for a high sensitivity circuit and radio frequency-to-direct current (RF-to-DC) power conversion. Actual experiments showed that the proposed power processing circuit could operate with an incident power as low as −50 dBm. It has been found that the proposed harvesting system stored 0.11 J in a 200 mF supercapacitor as the storage device in 20 hours of the experimentation periods. Moreover, actual results for the overall energy harvesting system is compared with previous research, and it has been found that the proposed system has advantages over the listed works.

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“…1,2 The possibility to extend the standalone lifetime of the electronic devices, recharging the power supply accumulator whenever energy is available without a dedicated source, makes this technology suitable for a wide range of applications, such as wireless sensor nodes (WSN) and internet of things (IoT). 1,2 The possibility to extend the standalone lifetime of the electronic devices, recharging the power supply accumulator whenever energy is available without a dedicated source, makes this technology suitable for a wide range of applications, such as wireless sensor nodes (WSN) and internet of things (IoT).…”

Section: Introductionmentioning

confidence: 99%

Analysis and design of an integrated RF energy harvester for ultra low‐power environments

Caselli

Tonelli

Boni

2019

Circuit Theory & Apps

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Radio-frequency (RF) energy harvesting must cope with the limited availability and high variability of the energy source. In this paper, the available RF power in three typical environments (urban, semi-urban, and rural) is investigated. Measurements show that in the surveyed urban and semi-urban environments, an average input power above −22 and −29 dBm, respectively, is available in the [700, 1,000] MHz band.A mathematical model of the interface between the RF rectifier and the DC-DC converter is provided. The analysis demonstrates that the energy can be efficiently transferred to the external accumulator coupling the rectifier with a strobed, input control DC-DC converter. Based on the measurements and the analysis, an RF harvester architecture has been designed in 65 nm Complementary Metal-Oxide Semiconductor (CMOS) technology to operate over the [−40, 85] o C temperature and the [1.1, 2.5] V battery voltage ranges. The input control strategy adopted for the converter allows the adaptation of the harvester to the available RF power and enables a real maximum power point tracking (MPPT). Post-layout simulation of the harvester, recharging a large capacitor, precharged at 2 V, at 950 MHz of input frequency returned a 33.4% peak efficiency with an input power of 15 W (−18 dBm). The minimum input power leading to a positive energy balance is −30 dBm with an output voltage of 1.1 V. available in both indoor and outdoor environments, and it does not require movements or frictions (like electro-mechanic and piezoelectric harvesters) that may shorten the device lifetime. On the other hand, the RF energy can be classified as ambient-dependent, noncontrollable, and nonpredictable. 3 Therefore, the prior study of the RF power distribution in the environment is the basis for a fruitful design of an RF harvester circuit. Metrics like Sensitivity (S IN ) of the front-end and Power Conversion Efficiency ( TOT ) are critical and must be optimized to exploit the RF source.It has been shown that in the underground stations of a densely populated and strongly developed metropolis such as London or Boston, the RF field can be a competitive harvesting source in terms of recovered DC power, compared with other scavenging techniques, such as thermal human or vibration. 2,4 However, little information is available on RF energy availability in many other environments. In this paper, we report long-term measurements performed by means of a commercial multi-band dipole array antenna in three different environments (here defined as urban, semi-urban, and rural) of a limited area in Northern Italy. The aim of this measurement campaign is to verify whether the ambient RF power, in these and similar locations, can be an effective source for an RF energy harvester.Many harvesting systems, comprising an antenna, an RF AC-DC converter, a DC-DC converter, and a charge accumulator have already been presented in literature, eg, previous studies 5-7 Usually, a large buffer capacitor (C H ) is placed between the AC-DC and DC-DC converters to gene...

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A Multi-Band Stacked RF Energy Harvester With RF-to-DC Efficiency Up to 84%

Cited by 308 publications

References 26 publications

A compact dual‐band rectenna for ambient RF energy harvesting

A compact dual‐band rectenna for ambient RF energy harvesting

A Power Processing Circuit for Indoor Wi-Fi Energy Harvesting for Ultra-Low Power Wireless Sensors

Analysis and design of an integrated RF energy harvester for ultra low‐power environments

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