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An Autonomous Wireless Sensor Node Incorporating a Solar Cell Antenna for Energy Harvesting

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2 Author(s)
Danesh, M. ; Electron. Res. Lab., Delft Univ. of Technol., Delft, Netherlands ; Long, J.R.

An autonomous 3-5 GHz UWB wireless sensor node uses a single 2×2 cm2 solar cell to generate up to 20 mW-peak power outdoors. The solar cell behaves as a broadband monopole antenna in the 3-10 GHz range, thus miniaturizing the overall package size. The sensor node consumes an average power of 10μW when transmitting 1 kb/s every minute using OOK wide band FM data bursts. Storing 2.85 J of harvested energy on a supercapacitor from the solar cell in a single charge cycle ensures more than two days of packet data transmission.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:59 ,  Issue: 12 )