Barroca, NorbertoSaraiva, Henrique M.Gouveia, Paulo T.Tavares, JorgeBorges, Luís M.Velez, Fernando J.Loss, CarolineSalvado, RitaPinho, PedroGonçalves, RicardoCarvalho, Nuno BorgesChavez-Santiago, RaulBalasingham, Ilangko2025-02-102025-02-102013-09Norberto Barroca, Henrique M. Saraiva, Paulo T. Gouveia, Jorge Tavares, Luís M. Borges, Fernando J. Velez, Caroline Loss, Rita Salvado, Pedro Pinho, Ricardo Gonçalves, Nuno Borges Carvalho, Raúl Chavéz-Santiago and Ilangko Balasingham, “Antennas and Circuits for Ambient RF Energy Harvesting in Wireless Body Area Networks,” in Proc. of PIMRC 2013 – The 24th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, London, United Kingdom, Sep. 2013.http://hdl.handle.net/10400.6/15094In this paper, we identify the spectrum opportunities for radio frequency (RF) energy harvesting through power density measurements from 350 MHz to 3 GHz. The field trials have been performed in Covilhâ by using the NAKDA-SMR spectrum analyser with a measuring antenna. Based on the identification of the most promising opportunities, a dual-band band printed antenna operating at GSM bands (900/1800) is proposed, with gains of the order 1.8-2.06 dBi and efficiency 77.6-84%. Guidelines for the design of RF energy harvesting circuits and choice of textile materials for a wearable antenna are also discussed. Besides, we address the guidelines for designing circuits to harvest energy in a scenario where a wireless body area network (WBAN) is being sustained by a TX91501 Powercasf® RF dedicated transmitter and a five-stage Dickson voltage multiplier responsible for harvesting the RF energy. The IRIS motes, considered for our WBAN scenario, can perpetually operate if the RF received power attains at least -10 dBm.engAntennas and CircuitsAmbient RF Energy HarvestingWireless Body Area Networksconference object10.1109/PIMRC.2013.6666194