A Triple-Band High-Gain Multibeam Ambient RF Energy Harvesting System Utilizing Hybrid Combining

Shen, Shanpu; Zhang, Yujie; Chiu, Chi-Yuk; Murch, R.D.

doi:10.1109/tie.2019.2952819

Cited by 98 publications

(49 citation statements)

References 38 publications

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“…Compared with near-field WPT via inductive coupling or magnetic resonance [4]- [6], far-field WPT utilizes a dedicated source to radiate RF energy through a wireless channel and a rectifying antenna (rectenna) to receive and convert this energy into direct current (dc) power so that it can transfer power over a long distance and broader coverage. A related technology to far-field WPT is ambient RF energy harvesting [7]- [10], which uses rectenna to receive RF energy from existing source such as cellular and WiFi system. However, ambient RF energy harvesting is less reliable and controllable than far-field WPT.…”

Section: Introductionmentioning

confidence: 99%

Wireless Power Transfer With Distributed Antennas: System Design, Prototype, and Experiments

Shen

Kim

Song

et al. 2021

IEEE Trans. Ind. Electron.

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In this paper, we design and experiment a farfield wireless power transfer (WPT) architecture based on distributed antennas, so-called WPT DAS, that dynamically selects transmit antenna and frequency to increase the output dc power. Uniquely, spatial and frequency diversities are jointly exploited in the proposed WPT DAS with low complexity, low cost, and flexible deployment to combat the wireless fading channel. A numerical experiment is designed to show the benefits using antenna and frequency selections in spatially and frequency selective fading channels for single-user and multiuser cases. Accordingly, the proposed WPT DAS for single-user and two-user cases is prototyped. At the transmitter, we adopt antenna selection to exploit spatial diversity and adopt frequency selection to exploit frequency diversity. A low-complexity over-the-air limited feedback using an IEEE 802.15.4 RF interface is designed for antenna and frequency selections and reporting from the receiver to the transmitter. The proposed WPT DAS prototype is demonstrated in a real indoor environment. The measurements show that WPT DAS can boost the output dc power by up to 30 dB in single-user case and boost the sum of output dc power by up to 21.8 dB in twouser case and broaden the service coverage area in a low cost, low complexity, and flexible manner.

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Section: Introductionmentioning

confidence: 99%

Wireless Power Transfer With Distributed Antennas: System Design, Prototype, and Experiments

Shen

Kim

Song

et al. 2021

IEEE Trans. Ind. Electron.

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show abstract

“…They reported a maximum PCE of 84% at the frequency of 5.76 GHz. A triple-band multibeam RF energy harvesting system that is using hybrid combining was proposed in [ 19 ]. The authors, by hybrid combining of a 16-port antenna, achieved high gain values up to 11 dBi.…”

Section: Introductionmentioning

confidence: 99%

Triple-Band Single-Layer Rectenna for Outdoor RF Energy Harvesting Applications

Boursianis

Papadopoulou

Koulouridis

et al. 2021

Sensors

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A triple-band single-layer rectenna for outdoor RF energy applications is introduced in this paper. The proposed rectenna operates in the frequency bands of LoRa, GSM-1800, and UMTS-2100 networks. To obtain a triple-band operation, a modified E-shaped patch antenna is used. The receiving module (antenna) of the rectenna system is optimized in terms of its reflection coefficient to match the RF-to-DC rectifier. The final geometry of the proposed antenna is derived by the application of the Moth Search Algorithm and a commercial electromagnetic solver. The impedance matching network of the proposed system is obtained based on a three-step process, including the minimization of the reflection coefficient versus frequency, as well as the minimization of the reflection coefficient variations and the maximization of the DC output voltage versus RF input power. The proposed RF-to-DC rectifier is designed based on the Greinacher topology. The designed rectenna is fabricated on a single layer of FR-4 substrate. Measured results show that our proposed rectenna can harvest RF energy from outdoor (ambient and dedicated) sources with an efficiency of greater than 52%.

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“…RF energy harvesting from the environment will have an important role in future microelectronic circuits. This concept requires an efficient antenna as well as a circuit capable of converting RF signals to dc voltage, to replace batteries [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Ultra-Wide Band Multistage Rectifier for Pulsed Signal Power Transmission

Moulay¹,

Djerafi²

2021

PIER C

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This paper presents a multi-sections broad-band radio-frequency (RF) to direct-current (dc) power rectifier for pulsed signal transfer. The power transfer using a pulse allows to use a signal with low power spectral density. The optimal distributed configuration with critical parameters is studied to enhance the efficiency over broadband frequency and wide power range. A five-stage distributed RF-dc converter arrangement with micro-strip transmission line ensures the power harvesting from 100 MHz to 11 GHz. The designed and fabricated circuit is characterized at multi-frequencies of ultra-wide band (UWB). The distributed harvester significantly improves the detected voltage over a wide bandwidth compared to conventional RF detectors. The achieved efficiency with optimized parameters is 48% with five-stage harvester. A maximum dc output of 956 mV is reached at 8 dBm of input power of sinusoidal single tone signal at 1 GHz of frequency. The designed prototype is associated with a square wave signal to show the circuit potential in terms of power transfer. The output voltage can be controlled with input signal level, frequency, as well as the pulse width. For the power transfer circuit, 996 mV of maximum dc output voltage is reached for 1 V of input amplitude at 1 GHz with duty cycle of 50%. The efficiency increases significantly with duty cycle ratio of the input signal. The power harvester associated with a UWB antenna confirms the benefit of using a square wave signal in the case of power harvesting or transfer.

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A Triple-Band High-Gain Multibeam Ambient RF Energy Harvesting System Utilizing Hybrid Combining

Cited by 98 publications

References 38 publications

Wireless Power Transfer With Distributed Antennas: System Design, Prototype, and Experiments

Wireless Power Transfer With Distributed Antennas: System Design, Prototype, and Experiments

Triple-Band Single-Layer Rectenna for Outdoor RF Energy Harvesting Applications

Enhanced Ultra-Wide Band Multistage Rectifier for Pulsed Signal Power Transmission

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