An RF energy harvester with 35.7% PCE at PIN of −15 dBm

A 900-MHz system is designed to harvest ambient RF energy and generate 2-V output voltage. An efficient power path structure with adaptive control is proposed to maintain close-to-optimal power conversion efficiency. The control circuit consumes low power by adopting a novel open-loop asynchronous c...

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Bibliographic Details
Main Authors: Ping-Hsuan Hsieh, Tao Chiang
Format: Conference Proceeding
Language:English
Subjects:
Adaptive control
Radio frequency
Rectifiers
Switches
Timing
Voltage control
Online Access:Request full text
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Summary:A 900-MHz system is designed to harvest ambient RF energy and generate 2-V output voltage. An efficient power path structure with adaptive control is proposed to maintain close-to-optimal power conversion efficiency. The control circuit consumes low power by adopting a novel open-loop asynchronous control scheme and duty-cycled operation. A startup circuit is also presented. Measurement results show minimum P IN for startup of -17 dBm, end-to-end PCE of 35.7% at P IN of -15 dBm, and quiescent current of 1.56 μA at VOUT of 2 V.
ISSN:2158-5601
2158-5636