1. 2.4-GHz Pre-bias RF Energy Harvesting Rectifier with -35-dBm Sensitivity for Self-powered Chips
- Author
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Xiucheng Hao, Luyao Zhang, Yongan Zheng, Le Ye, Huailin Liao, Ru Huang, Mingxiao He, Hao Zhang, and Enbin Gong
- Subjects
Computer science ,business.industry ,Electrical engineering ,Biasing ,Topology (electrical circuits) ,Hardware_PERFORMANCEANDRELIABILITY ,Power (physics) ,Rectifier ,Hardware_INTEGRATEDCIRCUITS ,business ,Energy harvesting ,Wireless sensor network ,Sensitivity (electronics) ,Voltage - Abstract
This paper proposes a 2.4-GHz pre-bias RF energy harvesting rectifier with -35-dBm sensitivity for self-powered chips of wireless sensor networks (WSNs) for Internet of Things (IoT) applications. For high sensitivity, a pre-bias topology is presented by designing pre-stage and drive-stage rectifiers separately with multiple antennas. The pre-stage and the bias circuit just provide a proper bias voltage without driving loads. At single drive-stage configuration, -35-dBm sensitivity can be achieved with 2.4-GHz RF input power, 10-MΩ output load and 0.5-V continuous output voltage. When an 1% duty-cycled operating mode is adopted, 25-μW power can be supplied intermittently with 0.5-V output voltage. This proposed circuit is designed in 0.18-μm standard CMOS process.
- Published
- 2018