Input Power Range Extension Using Duty-Cycling and Granularity Reduction in a 5.8GHz RF Energy Harvester Dynamic Matching Circuit

Threshold voltage self-compensation technology (TVSC) has been widely used in RF energy harvester. In this paper, the influence of the size of rectifying transistors, the stages and compensation orders of the rectifier, and the impedance matching network on the performance of RF energy harvester has been studied. A dual band RF energy harvester with hybrid threshold voltage self-compensation (HTVSC) is proposed in this paper in 65-nm CMOS process according to the distribution characteristic of the ambient RF energy. By combining TVSC and the technology of weak forward bias between the source and body of the rectifying transistor, the threshold voltage of MOSFET can be dramatically decreased. The performance of the RF energy harvester has been improved using this new technology. The simulation results show that the proposed dual band RF energy harvester can acquire energy at the band of 900[Formula: see text]MHz and 2.4[Formula: see text]GHz. At 900[Formula: see text]MHz-band (825–960[Formula: see text]MHz), with 1[Formula: see text]M[Formula: see text] load resistor, the output voltage of the energy harvester can be over 1.0[Formula: see text]V with a minimum [Formula: see text]18[Formula: see text]dBm RF input power and a maximum 13.8% power conversion efficiency (PCE). At 2.4[Formula: see text]GHz-band (2.4–2.485[Formula: see text]GHz), the minimum input power can be as low as [Formula: see text]19[Formula: see text]dBm with a maximum efficiency of 16.8%.

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Design of a High Performance RF Energy Harvester for Wide Input Power Range

2019 International SoC Design Conference (ISOCC) ◽

10.1109/isocc47750.2019.9027680 ◽

2019 ◽

Author(s):

Muhammad Basim ◽

Danial Khan ◽

Khuram Shahzad ◽

Qurat ul Ain ◽

Muhammad Asif ◽

...

Keyword(s):

High Performance ◽

Energy Harvester ◽

Input Power ◽

Rf Energy ◽

Rf Energy Harvester

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A 5μW-5mW input power range, 0–3.5V output voltage range RF energy harvester with power-estimator-enhanced MPPT controller

2018 IEEE Custom Integrated Circuits Conference (CICC) ◽

10.1109/cicc.2018.8357083 ◽

2018 ◽

Cited By ~ 3

Author(s):

Xingyi Hua ◽

Ramesh Harjani

Keyword(s):

Output Voltage ◽

Energy Harvester ◽

Input Power ◽

Voltage Range ◽

Mppt Controller ◽

Rf Energy ◽

Rf Energy Harvester

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A 5.8 GHz Low-Power Energy Harvester for RF Wireless Power Transfer Systems

Journal of Circuits System and Computers ◽

10.1142/s0218126620500760 ◽

2019 ◽

Vol 29 (05) ◽

pp. 2050076

Author(s):

Mariem Kanoun ◽

David Cordeau ◽

Jean-Marie Paillot ◽

Hassene Mnif ◽

Mourad Loulou

Keyword(s):

Low Power ◽

Power Management ◽

Design Methodology ◽

Energy Harvester ◽

Input Power ◽

Sensor Nodes ◽

Wireless Power ◽

Simulation Results ◽

Rf Energy ◽

Rf Energy Harvester

This paper presents the design and implementation of an RF energy harvester system at 5.8[Formula: see text]GHz for low-power wireless transmission applications. The potential application of the proposed system is to wirelessly power sensor nodes. First, a design methodology of the rectifier based on a theoretical approach is presented. The simulation results show an excellent correlation with the theoretical ones, proving the accuracy of the proposed design methodology. A prototype is fabricated and the simulation results are validated by the measurements. Then, the rectenna is combined to a commercial power management circuit and a load which emulates the behavior of a sensor. The power management circuit boosts and regulates the output DC voltage as well as stores the collected energy into a capacitor. Finally, the complete system is experimentally tested and excellent performances are demonstrated. The efficiency of the RF energy harvester is 24% at [Formula: see text]10[Formula: see text]dBm input power and 47% at [Formula: see text]5[Formula: see text]dBm input power which are the highest reported measured efficiencies at this frequency and at those power levels. The complete rectenna system is able to harvest 4.62[Formula: see text]mJ in 40 s and 192[Formula: see text]s for [Formula: see text]6[Formula: see text]dBm and [Formula: see text]10[Formula: see text]dBm input power, respectively allowing us to power wirelessly low-power electronic devices.

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