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Advisor(s)
Abstract(s)
Radio frequency (RF) energy harvesting is an emerging technology that will enable to drive the next generation of wireless sensor networks (WSNs) without the need of using batteries. In this paper, we present RF energy harvesting circuits specifically developed for GSM bands (900/1800) and a wearable dual-band antenna suitable for possible implementation within clothes for body worn applications. Besides, we address the development and experimental characterization of three different prototypes of a five-stage Dickson voltage multiplier (with match impedance circuit) responsible for harvesting the RF energy. Different printed circuit board (PCB) fabrication techniques to produce the prototypes result in different values of conversion efficiency. Therefore, we conclude that if the PCB fabrication is achieved by means of a rigorous control in the photo-positive method and chemical bath procedure applied to the PCB it allows for attaining better values for the conversion efficiency. All three prototypes (1, 2 and 3) can power supply the IRIS sensor node for RF received powers of -4 dBm, -6 dBm and -5 dBm, and conversion efficiencies of 20, 32 and 26%, respectively.
Description
Keywords
Design and Evaluation Circuits and Antennas Multi-Band RF Energy Harvesting WSNs
Citation
Luís M. Borges, Norberto Barroca, Henrique M. Saraiva, Jorge Tavares, Paulo Gouveia, Fernando J. Velez, Caroline Loss, Luisa Salvado, Pedro Pinho, Ricardo Gonçalves, Nuno Borges Carvalho, Raúl Chávez-Santiago and Ilangko Balasingham, “Design and Evaluation of Multi-Band RF Energy Harvesting Circuits and Antennas for WSNs,” in Proc. of International Conference on Telecommunications 2014 (ICT 2014), Lisboa, Portugal, 5-7 May 2014.
Publisher
IEEE