Energy Scavenging for Inductively Coupled Passive RFID Systems

Deployment of passive radio-frequency identification (RFID) systems or RFID-enhanced sensor networks requires good understanding of the energy scavenging principles. This paper focuses on the energy scavenging design considerations of inductively coupled passive HF RFID systems. The theoretical esti...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2007-02, Vol.56 (1), p.118-125
Main Authors: Bing Jiang, Smith, J.R., Philipose, M., Roy, S., Sundara-Rajan, K., Mamishev, A.V.
Format: Article
Language:English
Subjects:
Antenna design
Batteries
Derivation
energy scavenging
Estimation theory
impedance matching
Instrumentation
loop antenna
Loop antennas
Mathematical analysis
Mutual coupling
Optimization
Passive RFID tags
passive tag
power harvesting
Power supplies
Radio frequency
Radio frequency identification
radio-frequency identification (RFID)
Radiofrequency identification
Readers
Scavenging
Sensor systems
Tuning
Wireless sensor networks
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Summary:Deployment of passive radio-frequency identification (RFID) systems or RFID-enhanced sensor networks requires good understanding of the energy scavenging principles. This paper focuses on the energy scavenging design considerations of inductively coupled passive HF RFID systems. The theoretical estimation of the power by a loop antenna is derived, and the effect of the design parameters on the harvested power is investigated. It is shown that the power delivery performance is largely affected by the tag load at the reader. An adaptive matching circuit at the reader is proposed for achieving optimum power delivery performance when the reader has a variable load. Experimental studies confirm analytical derivations
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2006.887407