RF energy harvester with peak power conversion efficiency tracking

Sun, Min; Ranasinghe, Damith C.; Al-Sarawi, Said F.

doi:10.1109/apccas.2016.7803908

Cited by 9 publications

(8 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The LPD matching network is made by 3 lumped elements (shunt inductor, series inductor, and shunt capacitor), while HPD's one is a 5 elements network (series inductor and two inductor-capacitor L-type networks). Since diodes are non-linear devices, the impedance of the rectifier is affected by the input power level [32,33]; thus, the rectifiers have been matched to the antenna for the selected input power levels Pin (−10 dBm for the LPD and 10 dBm for the HPD). Then, the values of both lumped elements and microstrips have been optimized using the Smith chart, as shown for HPD in Figure 4, for different values of Pin; to get a good matching, the impedance of the rectifier circuit must be equal to the antenna impedance at the working frequency and the considered power level.…”

Section: Design Methods and Optimizationmentioning

confidence: 99%

Rectifiers’ Design and Optimization for a Dual-Channel RF Energy Harvester

Colaiuda

Ulisse

Ferri

2020

JLPEA

View full text Add to dashboard Cite

This paper presents the design and implementation of two front-ends for RF (Radio Frequency) energy harvesting, comparing them with the commercial one—P2110 by Powercast Co. (Pittsburgh, PA, USA) Both devices are implemented on a discrete element board with microstrip lines combined with lumped elements and are optimized for two different input power levels (−10 dBm and 10 dBm, respectively), at the GSM900 frequencies. The load has been fixed at 5kΩ, after a load-pull analysis on systems. The rectifiers stages implement two different Schottky diodes in two different topologies: a single diode and a 2-stage Dickson’s charge pump. The second one is compared with the P2110 by generating RF fields at 915 MHz with the Powercast Powerspot. The main aim of this work is to design simple and efficient low-cost devices, which can be used as a power supply for low-power autonomous sensors, with better performances than the current solutions of state-of-the-art equipment, providing an acceptable voltage level on the load. Measurements have been conducted for input power range −20 dBm up to 10 dBm; the best power conversion efficiency (PCE) is obtained with the second design, which reaches a value of 70% at 915 MHz. In particular, the proposed device exhibited better performance compared to the P2110 commercial device, allowing a maximum distance of operation of up to 22 meters from the dedicated RF power source, making it suitable even for IoT (Internet of Things) applications.

show abstract

Section: Design Methods and Optimizationmentioning

confidence: 99%

Rectifiers’ Design and Optimization for a Dual-Channel RF Energy Harvester

Colaiuda

Ulisse

Ferri

2020

JLPEA

View full text Add to dashboard Cite

show abstract

“…Zero frequency ω z can be modified by placing a resistor R z in series with the compensation capacitor C Z [26]. If R z ≥ ( g m,MN6 ) −1 , then ω z ≤ 0.…”

Section: Circuit Topology Of Rf-energy-harvesting Integrated Circuitmentioning

confidence: 99%

Small-Area Radiofrequency-Energy-Harvesting Integrated Circuits for Powering Wireless Sensor Networks

Sung

Chung

Lai

et al. 2019

Sensors

View full text Add to dashboard Cite

This study presents a radiofrequency (RF)-energy-harvesting integrated circuit (IC) for powering wireless sensor networks with a wireless transmitter with an industrial, scientific, and medical (ISM) of 915 MHz. The proposed IC comprises an RF-direct current (DC) rectifier, an over-voltage protection circuit, a low-power low-dropout (LDO) voltage regulator, and a charger control circuit. In the RF-DC rectifier circuit, a six-stage Dickson voltage multiplier circuit is used to improve the received RF signal to a DC voltage by using native MOS with a small threshold voltage. The over-voltage protection circuit is used to prevent a high-voltage breakdown phenomenon from the RF front-end circuit, particularly for near-field communication. A low-power LDO regulator is designed to provide stable voltage by using zero frequency compensation and a voltage-trimming feedback. Charging current is amplified N times by using a current mirror to rapidly and stably charge a battery in the proposed charger control circuit. The obtained results revealed that the maximum power conversion efficiency of the proposed RF-energy-harvesting IC was 40.56% at an input power of −6 dBm, an output voltage of 1.5 V, and a load of 30 kΩ. A chip area of the RF-energy-harvesting IC was 0.58 × 0.49 mm2, including input/output pads, and power consumption was 42 μW.

show abstract

“…Relying the electromagnetic (EM) energy, typically, a spectral survey reveals a wide range of energy contributions in the environment that are difficult to collect and store [1][2][3][4]. Till now, many RF energy harvesters have been presented in the literature, but only a few have been able to catch energy with good efficiency [5][6][7][8][9][10] being, especially at very low RF available energy, difficult to achieve good rectifiers. There are many problems that limit the collection of these resources, as for instance the not constant presence of the EM signals in the environment during the day and their spectral characteristics, due to modern communication codes, that spread the transmitted energy.…”

Section: Introductionmentioning

confidence: 99%

“…There are many problems that limit the collection of these resources, as for instance the not constant presence of the EM signals in the environment during the day and their spectral characteristics, due to modern communication codes, that spread the transmitted energy. From an electronic point of view, there are physical limitations that do not facilitate the realization of EM energy harvesters [5][6][7][8][9][10][11][12]. In particular, for what concerns the antenna and rectification section, its pattern and characteristics are strictly related to the target incoming frequency; another critical part is the regulation and storage section, because being not constant in time, the caught energy cannot be furnished to any devices but must be stored and provided on request, if available.…”

Section: Introductionmentioning

confidence: 99%

An IC architecture for RF Energy Harvesting systems

Pantoli

Leoni

Stornelli

et al. 2017

JCOMSS

View full text Add to dashboard Cite

In this work we present an IC architecture for RF energy harvesting. The system has been designed with a 0.18μm CMOS SMIC technology and optimized at 900MHz. Simulation results have confirmed that the integrated system handles an incoming power typically ranging from -25 dBm to 20 dBm by rectifying the variable input signals into a DC voltage source with an overall efficiency up to 50%. The chip area estimation for the proposed system is as low as 3x3mm2.

show abstract

RF energy harvester with peak power conversion efficiency tracking

Cited by 9 publications

References 13 publications

Rectifiers’ Design and Optimization for a Dual-Channel RF Energy Harvester

Rectifiers’ Design and Optimization for a Dual-Channel RF Energy Harvester

Small-Area Radiofrequency-Energy-Harvesting Integrated Circuits for Powering Wireless Sensor Networks

An IC architecture for RF Energy Harvesting systems

Contact Info

Product

Resources

About