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An Adaptive Power Harvester with Active Load Modulation for Highly Efficient Short/Long Range RF WPT Applications

1
School of Electrical Engineering and Computer Science, Ottawa University, Ottawa, ON K1N 6N5, Canada
2
Department of Electrical Engineering, Qassim University, Qassim 51431, Saudi Arabia
3
Department of Electronic, Carleton University, Ottawa, ON K1S 5B6, Canada
*
Author to whom correspondence should be addressed.
Electronics 2018, 7(7), 125; https://doi.org/10.3390/electronics7070125
Received: 31 May 2018 / Revised: 12 July 2018 / Accepted: 17 July 2018 / Published: 23 July 2018
(This article belongs to the Special Issue RFID, WPT and Energy Harvesting)
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PDF [6545 KB, uploaded 23 July 2018]
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Abstract

After demonstrating, in previous works, the proof of concept of adaptive rectifiers with active load modulation to operate simultaneously for short/long range RF Wireless Power Transfer (WPT) while maintaining a high Power Conversion Efficiency (PCE), the authors introduced in this paper a power link budget of the proposed adaptive rectifier with a compromise between distance and efficiency. Then, to further exhibit its capabilities and enhance its performance, this paper first introduced a discussion about the parameters preventing the rectifier from operating over a wide range of input powers was performed. Furthermore, active load modulation was implemented and its co-simulation results presented. Finally, an adaptive rectifier was fabricated and its results successfully compared to measured data. It exhibits 40% of PCE over a wide dynamic input range of incident RF power levels from −6 to 25 dBm at the 900 MHz in the Industrial Scientific Medical band (ISM band), with a maximum PCE of 66% for an input power of 15 dBm. The proposed devices are therefore suitable for WPT applications to harvest energy from a controlled source. View Full-Text
Keywords: rectifier; schottky diode; efficiency; wireless sensor network; WPT rectifier; schottky diode; efficiency; wireless sensor network; WPT
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Almohaimeed, A.M.; Amaya, R.E.; Lima, J.A.; Yagoub, M.C.E. An Adaptive Power Harvester with Active Load Modulation for Highly Efficient Short/Long Range RF WPT Applications. Electronics 2018, 7, 125.

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