A Fully Integrated Reconfigurable Self-Startup RF Energy-Harvesting System With Storage Capability

作者：Abouzied Mohamed A^*; Ravichandran Krishnan; Sanchez Sinencio Edgar

来源：IEEE Journal of Solid-State Circuits, 2017, 52(3): 704-719.

DOI：10.1109/JSSC.2016.2633985

• Charge pump
• clamper
• CMOS
• compensation rectifier
• controller
• dual-path energy
• extra energy
• fully integrated
• Internet of Things
• LC matching
• nonoverlapping cross-coupled level shifters
• portable
• power management
• reconfigurable
• RF energy harvesting
• RF rectifier
• self-sustainable
• stages
• storage capacitor
• tunable
• ultralow power

This paper introduces a fully integrated RF energyharvesting system. The system can simultaneously deliver the current demanded by external dc loads and store the extra energy in external capacitors, during periods of extra output power. The design is fabricated in 0.18-mu m CMOS technology, and the active chip area is 1.08 mm(2). The proposed selfstartup system is reconfigurable with an integrated LC matching network, an RF rectifier, and a power management/controller unit, which consumes 66-157 nW. The required clock generation and the voltage reference circuit are integrated on the same chip. Duty cycle control is used to operate for the low input power that cannot provide the demanded output power. Moreover, the number of stages of the RF rectifier is reconfigurable to increase the efficiency of the available output power. For high available power, a secondary path is activated to charge an external energy storage element. The measured RF input power sensitivity is -14.8 dBm at a 1-V dc output.

• 出版日期2017-3