Broadband RF Energy-Harvesting Arrays

Kwiatkowski, Eric; Estrada, José Antonio Cecchini; Lopez-Yela, Ana; Popović, Zoya

doi:10.1109/jproc.2021.3134658

Cited by 21 publications

(9 citation statements)

References 59 publications

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“…In addition, such complex 3D construction does not fit within the planar and two-dimensional nature of most RFEH surfaces and planar arrays [1]. Without its reflector backing, the FoM of [12] drops to 60%, which may be attributed to the lower element gain and rectifier PCE.…”

Section: F Comparison With Previous Workmentioning

confidence: 99%

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Thin Flexible RF Energy Harvesting Rectenna Surface With a Large Effective Aperture for Sub μW/cm² Powering of Wireless Sensor Nodes

Wagih

Beeby

2022

IEEE Trans. Microwave Theory Techn.

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The DC power collected by Radio Frequency Energy Harvesting (RFEH) absorbing surfaces is limited by their physical aperture. Here, a compact, conformable, and ultra-thin sub-1 GHz large-area RFEH surface is proposed based on electricallysmall (ka=0.58) "wire-type" rectenna elements, with an effective area exceeding its physical aperture size. Using optimized largesignal complex source tuning, the rectifiers achieve up to 36% measured Power Conversion Efficiency (PCE) at −20 dBm. The proposed 15 cm-diameter six-element array generates a 27.5 µW at 1 V output from a 0.17 µW/cm 2 incident power density across a 40 kΩ load. Owing to its series connection, the voltage output is boosted and the load resistance-dependence is suppressed enabling over 60% of the maximum RF-to-DC PCE to be preserved for loads between 7 and 100 kΩ, with an area-normalized Figureof-Merit nearly 100% higher than previous arrays. The proposed array is integrated with a commercial DC-DC converter and demonstrated powering a Bluetooth Low Energy (BLE) wireless sensor node from an unprecedented incident power density of 0.25 µW/cm 2 . A practical demonstration using a commercial 3 W 915 MHz Powercast source is presented showing an 11 m operation range with a 1 V output, and illustrating the impact of polarization mismatch on the proposed array.

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Section: F Comparison With Previous Workmentioning

confidence: 99%

“…A myriad of RFEH surfaces have been reported including broadband surfaces [1], [7], polarization-insensitive surfaces [8], and full-wave rectifying surfaces [9]. Broadband RFEH surfaces have been reported based on spiral antenna elements operating up to 18 GHz [10].…”

mentioning

confidence: 99%

Thin Flexible RF Energy Harvesting Rectenna Surface With a Large Effective Aperture for Sub μW/cm² Powering of Wireless Sensor Nodes

Wagih

Beeby

2022

IEEE Trans. Microwave Theory Techn.

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“…Authors of [87] have contemplated the applications of wireless far-field energy transmission. The wireless infrastructure might also radiate energy to power up billions of low-power devices and Ultra Low-Power (ULP) devices [61], [88], [89], [90], [91], [92]. Moreover, it can eliminate the need for batteries in some mobile applications [92] eliminating the need for additional power supply devices.…”

Section: B Prospective Applications Of Tpcmentioning

confidence: 99%

Overview of Talkative Power Conversion Technologies

Liserre

Beiranvand

Leng

et al. 2023

IEEE Open J. Power Electron.

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Power Line Communication (PLC) and Simultaneous Wireless Information and Power Transfer (SWIPT) are popular examples of applications, where power and information are transmitted simultaneously. In most cases, different devices have been used to generate the power and communication signals independently. Usually, the information is superimposed onto the power signal using an external modulator. Recently, power converters have been used to generate pulses not just for power conversion but also for information transfer simultaneously. This approach represents a fundamental difference because it exploits the signal processing potential of Pulse Width Modulation (PWM), where for power conversion only the average pulse width is used, while the information is represented by the harmonics instead of being filtered out, as typically done in power electronics. The concept of embedding information into the switching ripple generated by a switched-mode power converter has recently been dubbed Talkative Power (TP), in this paper referred as Talkative Power Conversion (TPC). TPC technologies are reviewed in non-isolated and isolated converters in this paper. Potential applications include visible light communications, battery management systems, switching reluctance generators/motors, microgrids, and wireless electric vehicle charging stations. Finally, trending topics are identified.INDEX TERMS Talkative power conversion, pulse width modulation converters, power line communication, switching ripple communication, simultaneous wireless information and power transfer.

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“…5. The works [43], [44], [45], [46], [47], [48] analyze further its structure. Nonlinearity does the trick of frequency conversion, converting RF input signals into higher harmonics and direct current (dc).…”

Section: Energy Harvester Diode Modeling and Technologiesmentioning

confidence: 99%

RF Energy Harvesting and Wireless Power Transfer for Energy Autonomous Wireless Devices and RFIDs

Niotaki

Carvalho

Georgiadis³

et al. 2023

IEEE J. Microw.

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Radio frequency (RF) energy harvesting and wireless power transmission (WPT) technologies -both near-field and far-field-have attracted significant interest for wireless applications and RFID systems. We already utilize near-field WPT products in our life and it is expected that RF EH and far-field WPT systems can drive the future low-power wireless systems. In this article, we initially present a brief historical overview of these technologies. The main technical challenges of rectennas and WPT transmitters are discussed. Furthermore, this paper presents the recent advances on the development of these technologies, including the possibility of powering RFID systems through the millimeter wave power from 5G networks, the trends in flexible rectennas design and the technological developments on the simultaneous wireless information and power transfer (SWIPT).

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Broadband RF Energy-Harvesting Arrays

Cited by 21 publications

References 59 publications

Thin Flexible RF Energy Harvesting Rectenna Surface With a Large Effective Aperture for Sub μW/cm² Powering of Wireless Sensor Nodes

Thin Flexible RF Energy Harvesting Rectenna Surface With a Large Effective Aperture for Sub μW/cm² Powering of Wireless Sensor Nodes

Overview of Talkative Power Conversion Technologies

RF Energy Harvesting and Wireless Power Transfer for Energy Autonomous Wireless Devices and RFIDs

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Broadband RF Energy-Harvesting Arrays

Cited by 21 publications

References 59 publications

Thin Flexible RF Energy Harvesting Rectenna Surface With a Large Effective Aperture for Sub μW/cm2 Powering of Wireless Sensor Nodes

Thin Flexible RF Energy Harvesting Rectenna Surface With a Large Effective Aperture for Sub μW/cm2 Powering of Wireless Sensor Nodes

Overview of Talkative Power Conversion Technologies

RF Energy Harvesting and Wireless Power Transfer for Energy Autonomous Wireless Devices and RFIDs

Contact Info

Product

Resources

About

Thin Flexible RF Energy Harvesting Rectenna Surface With a Large Effective Aperture for Sub μW/cm² Powering of Wireless Sensor Nodes

Thin Flexible RF Energy Harvesting Rectenna Surface With a Large Effective Aperture for Sub μW/cm² Powering of Wireless Sensor Nodes