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A wide input power range rectenna for energy harvesting and wireless power transfer applications
Author(s) -
Benhamou Abderrahim,
Tellache Mohamed,
Hebib Sami,
Mahfoudi Hichem
Publication year - 2020
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22461
Subject(s) - rectenna , energy harvesting , wireless power transfer , electrical engineering , rectifier (neural networks) , schottky diode , circulator , power (physics) , power transmission , maximum power transfer theorem , antenna (radio) , electronic engineering , computer science , wireless , engineering , diode , telecommunications , physics , stochastic neural network , quantum mechanics , machine learning , recurrent neural network , artificial neural network
This article describes a novel rectifying‐antenna design with extended input power range operating at 2.4 GHz for both ambient wireless energy harvesting and wireless power transmission (WPT) systems. The rectenna consists of a 2 × 2 fractal antenna array and a rectifier circuit with a high‐power conversion efficiency (PCE) in a wide input power range. This circuit contains two conversion stages based on two different Schottky diodes, and a third stage that dissipates the unconverted input power, which can disturb the harvesting process. These three stages are controlled by a power management block based on circulators, that direct the input power to the adequate stage according to its power range. A prototype of the proposed harvesting system is fabricated and experimentally validated. The measurement results confirm the wide input power range behavior of the designed rectenna with a relatively constant and high PCE (between 58% and 67%) for a power density ranging from 4 to 252 μW/cm 2 . The proposed solution can be successfully used for both ambient energy harvesting and WPT systems.