NDLI: An RF power harvesting system with input-tuning for long-range RFID tags

Content Provider	IEEE Xplore Digital Library
Author	Bakhtiar, A.S. Jalali, M.S. Mirabbasi, S.
Copyright Year	2010
Description	Author affiliation: Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada (Bakhtiar, A.S.; Jalali, M.S.; Mirabbasi, S.)
Abstract	In this paper, an RF power harvesting system with automatic input tuning for long-range RFID tags is described. The system uses a high quality factor LC-matching network to boost the voltage of the received RF signal. Then a new high-efficiency voltage rectifier is used to extract DC voltage from the signal. In order to maximize the voltage gain of the matching circuit, a tuning loop automatically adjusts the center frequency of the input matching network to achieve the optimum output DC voltage. The loop uses a low-power up/down counter. The power of the counter is optimized by minimizing the number of unnecessary internal transitions. A proof-of-concept system is designed and simulated in a 0.13μm CMOS. It achieves an efficiency of 50% which compares favourably with that of current state-of-the-art RF power harvesting systems.
Starting Page	4085
Ending Page	4088
File Size	303382
Page Count	4
File Format	PDF
ISBN	9781424453085
DOI	10.1109/ISCAS.2010.5537624
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-30
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio frequency RFID tags Voltage Rectifiers Circuit optimization Transistors Impedance CMOS technology Q factor Counting circuits
Content Type	Text
Resource Type	Article

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