Towards Low-Power High-Efficiency RF and Microwave Energy Harvesting

Hemour, Simon; Zhao, Yangping; Lorenz, Carlos H. P.; Houssameddine, D.; Gui, Y. S.; Hu, C.‐M.; Wu, Ke

doi:10.1109/tmtt.2014.2305134

Cited by 203 publications

(117 citation statements)

References 32 publications

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“…These include RF to DC power conversion efficiency, parasitic efficiency, and matching efficiency. When it comes to microwatt applications, Schottky diodes face some limitation in RF-DC conversion efficiency because of their high zero-bias junction resistance [59]. However, owing to recent developments in technology, if the retrieved power is less than −30 dBm (1 µW), then the low-barrier SMS7630 and VDI W-Band ZBD diodes are recommended due to their low parasitic power losses and low power dissipation in the matching network [60].…”

Section: Pros and Cons Of Schottky Diode And Cmos Technologymentioning

confidence: 99%

RF power harvesting: a review on designing methodologies and applications

Tran

Cha

Park

2017

Micro and Nano Syst Lett

242

146

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Wireless power transmission was conceptualized nearly a century ago. Certain achievements made to date have made power harvesting a reality, capable of providing alternative sources of energy. This review provides a summ ary of radio frequency (RF) power harvesting technologies in order to serve as a guide for the design of RF energy harvesting units. Since energy harvesting circuits are designed to operate with relatively small voltages and currents, they rely on state-of-the-art electrical technology for obtaining high efficiency. Thus, comprehensive analysis and discussions of various designs and their tradeoffs are included. Finally, recent applications of RF power harvesting are outlined.

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Section: Pros and Cons Of Schottky Diode And Cmos Technologymentioning

confidence: 99%

RF power harvesting: a review on designing methodologies and applications

Tran

Cha

Park

2017

Micro and Nano Syst Lett

242

146

View full text Add to dashboard Cite

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“…Previous works [12], [14] have demonstrated a good approximation using the squarelaw power rectification model that neglecting higher order harmonics inside diodes. In this rectification model, the power conversion efficiency mechanism is divided into several steps, each one with an intrinsic efficiency.…”

Section: Physical Limitations Of Rf Rectificationmentioning

confidence: 99%

“…Henrique Petzl Lorenz and their team have outstanding works on theoretical analysis of power conversion efficiency based on the square-law rectification model [12].…”

Section: A Brief History and Literature Reviewmentioning

confidence: 99%

“…Generally, higher power conversion efficiency can be achieved by special diodes with lower built-in voltage and parasitic resistance [12], [13], [14]. The load capacitor ensures to deliver power smoothly to the system load.…”

Section: Outline Of Thesismentioning

confidence: 99%

“…For the case of a simple L-matching network, the insertion losses can be calculated using the required quality factor of matching circuit Q r and the obtained quality factor Q m [12], [14], [33], using the following equations:…”

Section: Matching Efficiencymentioning

confidence: 99%

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Demonstration of an Efficient Ambient Radio-Frequency and Microwave Energy Harvesting System with High Sensitivity and DC Output

Shen

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Demonstration of an Efficient Ambient Radio-frequency and Microwave Energy Harvesting System with High Sensitivity and DC OutputDirected by: Professor N. Scott BarkerThe great potential to harvest and utilize ambient Radio-frequency and microwave power has led to much research as the occurrence of a worldwide coverage of radio waves during the past decade. However, RF harvesting circuits have already been proved for more than a half century, only a small number of them have been able to be activated freely without dedicated sources and harvest available ambient RF energy that typically has a power density ranging from 0.001 to 0.1 µW/cm 2 .This thesis presents a detail description of each element of an RF energy harvesting system operating at 2.45 GHz, including an antenna, an RF-to-DC conversion rectifier and an integrated module of DC-DC up-conversion and power management. This thesis does not focus on the design of the antenna and the integrated module, both of which are products designed by Texas Instruments.The key section of this thesis is concerned about the RF-to-DC rectifier, which is the core part that converts collected RF power to applicable DC power. In this section, the reasons that only a small number of rectifiers can work efficiently with ambient RF power levels are presented based on nonlinear model analyses of a diode, the dominant rectifying device in RF and microwave power harvesters. And the mechanism of overall power conversion efficiency (PCE) of the rectifier is explained in this analysis. Besides, a prototype of a modified rectifier is designed, fabricated and measured to demonstrate the potential ability to work in ambient power regions.The entire RF energy harvesting system is tested with an RF signal generator at the iii

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