Abstract:
For many years, wireless RF power transmission has been investigated as a viable method of power delivery in a wide array of applications, from high-power space solar pow...Show MoreMetadata
Abstract:
For many years, wireless RF power transmission has been investigated as a viable method of power delivery in a wide array of applications, from high-power space solar power satellites to low-power wireless sensors. However, until recently, efficient application at the low sub-milliwatt power levels has not been realized due to limitations in available control circuitry. This paper presents a “smart” microcontroller-based power management system with online power stage efficiency optimization and maximum power point tracking (MPPT). The system is experimentally evaluated using a new, more accurate four-quadrant rectenna model and circuit realization that enables rigorous testing of the power management system for a wide range of rectenna arrays and power characteristics. Hardware results are presented with online optimization over a converter input power range from 10 μW to 1 mW. Results are also shown based on the application of harvesting RF power from a nearby cellular tower, where the power management system collects up to seven times more energy when compared to a direct battery connection.
Published in: IEEE Transactions on Circuits and Systems I: Regular Papers ( Volume: 57, Issue: 7, July 2010)
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- IEEE Keywords
- Index Terms
- Energy Harvesting ,
- Power Management ,
- RF Energy ,
- Power Management System ,
- Maximum Power ,
- Power Level ,
- Transmission Power ,
- Input Power ,
- Maximum Point ,
- Wireless Sensor ,
- RF Power ,
- Maximum Power Point ,
- Maximum Power Point Tracking ,
- Low Power Levels ,
- Power Point Tracking ,
- Online Optimization ,
- Power Stage ,
- Control Circuitry ,
- Impedance ,
- Optimization Algorithm ,
- Switching Loss ,
- Conduction Loss ,
- First Quadrant ,
- Input Voltage ,
- Incident Power Density ,
- Input Power Level ,
- Cell Towers ,
- High Levels Of Power ,
- I-V Curves ,
- Power Density
- Author Keywords
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Energy Harvesting ,
- Power Management ,
- RF Energy ,
- Power Management System ,
- Maximum Power ,
- Power Level ,
- Transmission Power ,
- Input Power ,
- Maximum Point ,
- Wireless Sensor ,
- RF Power ,
- Maximum Power Point ,
- Maximum Power Point Tracking ,
- Low Power Levels ,
- Power Point Tracking ,
- Online Optimization ,
- Power Stage ,
- Control Circuitry ,
- Impedance ,
- Optimization Algorithm ,
- Switching Loss ,
- Conduction Loss ,
- First Quadrant ,
- Input Voltage ,
- Incident Power Density ,
- Input Power Level ,
- Cell Towers ,
- High Levels Of Power ,
- I-V Curves ,
- Power Density
- Author Keywords