@inproceedings{b662b8581fd743a98b13e25648fa78dc,
title = "RFID-Enabled Energy Harvesting using Unidirectional Electrically-Small Rectenna Arrays",
abstract = "RFID has been widely adopted in sensing applications based on passive tags. We present, for the first time, a practical room-scale demonstration of a wireless power grid based on 868 MHz UHF RFID, with 27 dBm radiated power. The proposed harvester is a state-of-the-art flexible rectenna surface based on serially-connected tightly-coupled electricallysmall rectenna elements. Reflector-backing is proposed increasing the harvester's effective area by 3 dB with over two-fold increase in the harvested energy. The DC power harvesting pattern of the array are experimentally characterized showing an 18 dB front-to-back ratio. In a 40 m2 room with a single reader and 3 antennas, a maximum energy of 5.3 mJ was harvested using the unidirectional array in a capacitor over a 1-minute charging period. The minimum energy yield of 0.5 mJ, sufficient for powering a Bluetooth beacon, evidences that, despite its intermittency, RFID packets can create an indoor RF grid.",
keywords = "antenna arrays, antennas, rectennas, rectifiers, wireless power transfer (WPT)",
author = "Mahmoud Wagih and Rory Nesbitt and Shuja Ansari and Abbasi, \{Qammer H.\} and \{Ali Imran\}, Muhammad",
note = "Publisher Copyright: {\textcopyright} 2023 European Association for Antennas and Propagation.; 17th European Conference on Antennas and Propagation, EuCAP 2023 ; Conference date: 26-03-2023 Through 31-03-2023",
year = "2023",
doi = "10.23919/EuCAP57121.2023.10133250",
language = "English",
series = "17th European Conference on Antennas and Propagation, EuCAP 2023",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "17th European Conference on Antennas and Propagation, EuCAP 2023",
address = "United States",
}