Journal ArticleDOI
Enhanced Dual-Band Ambient RF Energy Harvesting With Ultra-Wide Power Range
TLDR
In this article, a dual-band rectifier with extended power range (EPR) and an optimal incident RF power strategy was proposed to achieve high power conversion efficiency (PCE) in an ultra-wide input power range by adopting a pHEMT in the proposed topology.Abstract:
This letter presents a novel dual-band rectifier with extended power range (EPR) and an optimal incident RF power strategy in the settings where the available RF energy fluctuates considerably. It maintains high power conversion efficiency (PCE) in an ultra-wide input power range by adopting a pHEMT in the proposed topology. Simultaneous RF power incident mode is proposed and preferred to the traditional independent mode for multi-band harvesting. Measured results show that more than 30% PCE is obtained with input power ranging from $-15~{\rm dBm}$ to 20 dBm and peak PCE of 60% is maintained from 5 to 15 dBm. Positive power gain is achieved from $-20~{\rm dBm}$ to more than 10 dBm. Investigation about the effect of RF power incident ratio on dual-band harvesting's performance is presented and it provides a good reference for future multi-band harvesting system design.read more
Citations
More filters
Journal ArticleDOI
A Novel Ultra-Lightweight Multiband Rectenna on Paper for RF Energy Harvesting in the Next Generation LTE Bands
Valentina Palazzi,Jimmy Hester,Jo Bito,Federico Alimenti,Christos Kalialakis,Ana Collado,Paolo Mezzanotte,Apostolos Georgiadis,Luca Roselli,Manos M. Tentzeris +9 more
TL;DR: A novel compact ultralightweight multiband RF energy harvester fabricated on a paper substrate featuring a superior performance to other state-of-the-art RF harvesters on flexible substrates is introduced.
Journal ArticleDOI
Efficiency in RF energy harvesting systems: A comprehensive review
TL;DR: This paper characterize an RF energy harvesting system, which makes the design of system possible to obtain the maximum efficiency and correspondingly the maximum output power, and presents detailed information about the system parameters.
Journal ArticleDOI
High-Efficiency Broadband Rectifier With Wide Ranges of Input Power and Output Load Based on Branch-Line Coupler
TL;DR: A novel rectifier based on a branch-line coupler with grounded isolation port that is able to realize high efficiency with wide input power, frequency and load dynamic ranges is proposed.
Journal ArticleDOI
Multiband Ambient RF Energy Harvesting Circuit Design for Enabling Batteryless Sensors and IoT
TL;DR: This paper demonstrates an adjustable circuit for harvesting from LTE 700-MHz, GSM 850- MHz, and ISM 900-MHz bands with one single circuit, fabricated on printed circuit board with comprehensive evaluations at each associated frequency to test the power conversion efficiency (PCE).
Journal ArticleDOI
A New Rectenna Using Beamwidth-Enhanced Antenna Array for RF Power Harvesting Applications
Hucheng Sun,Wen Geyi +1 more
TL;DR: In this article, a new rectenna using beamwidth-enhanced antenna array for RF power harvesting applications is presented, based on an example of a 1 × 4 patch antenna array, the beamwidthenhancement method is demonstrated.
References
More filters
Journal ArticleDOI
Ambient RF Energy Harvesting in Urban and Semi-Urban Environments
TL;DR: In this article, a city-wide RF spectral survey was undertaken from outside all of the 270 London Underground stations at street level, and four harvesters (comprising antenna, impedance-matching network, rectifier, maximum power point tracking interface, and storage element) were designed to cover four frequency bands from the largest RF contributors within the ultrahigh frequency (0.3-3 GHz) part of the frequency spectrum.
Journal ArticleDOI
Recycling ambient microwave energy with broad-band rectenna arrays
TL;DR: 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.
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
Design of a dual-band rectifier for wireless power transmission
Defu Wang,Renato Negra +1 more
TL;DR: The proposed dual-band rectifier has been implemented and the measurements show good agreement with simulation, and the measurement results for an input power level of 10 mW show peak RF-to-DC efficiencies of 66.8% and 51.5% at 2.45 GHz and 5.8 GHz.