Design of a Highly Efficient Wideband Multi-Frequency Ambient RF Energy Harvester


Roy, Sunanda and Tiang, Jun Jiat and Roslee, Mardeni and Ahmed, Md. Tanvir and Kouzani, Abbas Z. and Mahmud, M. A. Parvez (2022) Design of a Highly Efficient Wideband Multi-Frequency Ambient RF Energy Harvester. Sensors, 22 (2). p. 424. ISSN 1424-8220

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For low input radio frequency (RF) power from −35 to 5 dBm, a novel quad-band RF energy harvester (RFEH) with an improved impedance matching network (IMN) is proposed to overcome the poor conversion efficiency and limited RF power range of the ambient environment. In this research, an RF spectral survey was performed in the semi-urban region of Malaysia, and using these results, a multi-frequency highly sensitive RF energy harvester was designed to harvest energy from available frequency bands within the 0.8 GHz to 2.6 GHz frequency range. Firstly, a new IMN is implemented to improve the rectifying circuit’s efficiency in ambient conditions. Secondly, a self-complementary log-periodic higher bandwidth antenna is proposed. Finally, the design and manufacture of the proposed RF harvester’s prototype are carried out and tested to realize its output in the desired frequency bands. For an accumulative −15 dBm input RF power that is uniformly universal across the four radio frequency bands, the harvester’s calculated dc rectification efficiency is about 35 percent and reaches 52 percent at −20 dBm. Measurement in an ambient RF setting shows that the proposed harvester is able to harvest dc energy at −20 dBm up to 0.678 V.

Item Type: Article
Uncontrolled Keywords: Radio frequency, ambient, broadband rectifier, log periodic antenna, quad band, RF energy harvesting, RF spectral survey
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Nurul Iqtiani Ahmad
Date Deposited: 03 Feb 2022 03:18
Last Modified: 03 Feb 2022 03:18


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