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RF energy scavenging system utilising switched capacitor DC-DC converter

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5 Author(s)
Salter, T. ; Lab. for Phys. Sci., College Park, MD ; Choi, K. ; Peckerar, M. ; Metze, G.
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An RF energy scavenging circuit implementing a power matched Villard voltage doubler followed by a switched capacitor DC-DC converter for scavenging ultra-low RF power levels (20 dBm) is presented. Measurement results for the circuit, fabricated in a 130 nm CMOS process, show that 1 V can be generated across a 5 M load from as little as 25.5 Bm of input RF energy at 2.2 GHz. This represents a 9.5 dB improvement, over the measured sensitivity of our RF energy scavenging circuit without the use of a switched capacitor DC-DC converter stage.

Published in:

Electronics Letters  (Volume:45 ,  Issue: 7 )

Date of Publication:

March 26 2009

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