title: Multi-service highly sensitive rectifier for enhanced RF energy scavenging.
abstract: Due to the growing implications of energy costs and carbon footprints, the need to adopt inexpensive, green energy harvesting strategies are of paramount importance for the long-term conservation of the environment and the global economy. To address this, the feasibility of harvesting low power density ambient RF energy simultaneously from multiple sources is examined. A high efficiency multi-resonant rectifier is proposed, which operates at two frequency bands (478-496 and 852-869 MHz) and exhibits favorable impedance matching over a broad input power range (-40 to -10 dBm). Simulation and experimental results of input reflection coefficient and rectified output power are in excellent agreement, demonstrating the usefulness of this innovative low-power rectification technique. Measurement results indicate an effective efficiency of 54.3%, and an output DC voltage of 772.8 mV is achieved for a multi-tone input power of -10 dBm. Furthermore, the measured output DC power from harvesting RF energy from multiple services concurrently exhibits a 3.14 and 7.24 fold increase over single frequency rectification at 490 and 860 MHz respectively. Therefore, the proposed multi-service highly sensitive rectifier is a promising technique for providing a sustainable energy source for low power applications in urban environments.
authors.affiliation: School of Electrical and Computer Engineering, RMIT University, Melbourne, VIC 3001, Australia.
authors.forename: Negin
authors.initials: N
authors.lastname: Shariati
authors.affiliation: School of Electrical and Computer Engineering, RMIT University, Melbourne, VIC 3001, Australia.
authors.forename: Wayne S T
authors.initials: WS
authors.lastname: Rowe
authors.affiliation: School of Electrical and Computer Engineering, RMIT University, Melbourne, VIC 3001, Australia.
authors.forename: James R
authors.initials: JR
authors.lastname: Scott
authors.affiliation: School of Electrical and Computer Engineering, RMIT University, Melbourne, VIC 3001, Australia.
authors.forename: Kamran
authors.initials: K
authors.lastname: Ghorbani