Energy Scavenging for Inductively Coupled Passive RFID Systems

Deployment of passive 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 RFID systems. The theoretical estimation of the power by an RF antenna...

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Bibliographic Details
Main Authors: Bing Jiang, Smith, J.R., Philipose, M., Roy, S., Sundara-Rajan, K., Mamishev, A.V.
Format: Conference Proceeding
Language:English
Subjects:
antenna design
Batteries
Circuits
energy scavenging
impedance match
Impedance matching
inductive antenna
Mutual coupling
Passive RFID tags
passive tag
power harvesting
Power supplies
Radio frequency
Radiofrequency identification
RFID
Sensor systems
Wireless sensor networks
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Summary:Deployment of passive 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 RFID systems. The theoretical estimation of the power by an RF 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:1091-5281
DOI:10.1109/IMTC.2005.1604285