IEEE Journal of Solid-State Circuits · 2005 · 419 citations · 6 references
EngineeringElectrical EngineeringPower ElectronicsSensorsWireless CommunicationsBattery TechnologyCmos Circuit DesignRadio-frequency Integrated CircuitsSensor NetworksWireless Power TransferWireless Sensor NetworksCmos Radio-frequency CircuitsPower ConversionPower Conversion EfficiencyPower EfficiencyPower OutputRadio-frequency Wireless Power TransferRectifier CircuitsWireless Transmission
The study proposes a 950‑MHz wireless power transmission system with a high‑sensitivity rectifier to enable battery‑life‑free sensor tags. The system recharges a secondary battery on the tag via the base station’s RF output, using a 0.3‑µm CMOS rectifier with dynamic gate‑drain biasing. Measurements show the rectifier can recharge a 1.2‑V battery from –14 dBm RF input with 1.2 % efficiency, enabling 10‑m communication at 4 W base‑station output.
This paper presents a 950-MHz wireless power transmission system and a high-sensitivity rectifier circuit for ubiquitous sensor network tags. The wireless power transmission offers a battery-life-free sensor tag by recharging the output power of a base station into a secondary battery implemented with the tag. For realizing the system, a high-sensitivity rectifier with dynamic gate-drain biasing has been developed in a 0.3-/spl mu/m CMOS process. The measurement results show that the proposed rectifier can recharge a 1.2-V secondary battery over -14-dBm input RF power at a power conversion efficiency of 1.2%. In the proposed wireless system, this sensitivity corresponds to 10-m distance communication at 4-W output power from a base station.
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Ian F. Akyildiz, Weilian Su, Yogesh Sankarasubramaniam · IEEE Communications Magazine · 2002 · 13.7K citations
PicoRodio supports ad hoc ultra-low power wireless networking
Jan M. Rabaey, M.J. Ammer, J.L. da Silva et al. · Computer · 2000 · 1K citations