NDLI: Low-Cost Multiple-Bit Encoded Chipless RFID Tag Using Stepped Impedance Resonator

Content Provider	IEEE Xplore Digital Library
Author	Nijas, C.M. Deepak, U. Vinesh, P.V. Sujith, R. Mridula, S. Vasudevan, K. Mohanan, P.
Copyright Year	1963
Abstract	A novel compact multiple-bit encoded chipless RFID tag using a stepped impedance resonator (SIR) is proposed. The main advantage of SIR compared with other resonators is the independent control over the fundamental as well as first harmonic frequency by varying either the impedance ratio (K) or length ratio (α). The tag utilizes both the fundamental and the first harmonic frequency of the SIR to represent two bit information with a single resonator. The tag is capable of representing 2^2N number of bit combinations with N resonators. RFID tags are fabricated on C-MET LK4.3 (ε_r = 4.3 and tanδ = 0.0018) and RT Duriod (ε_r = 2.2 and tanδ = 0.0009) substrates. The structural information of the tag is encoded in the frequency spectrum, both in the magnitude and group delay of the backscattered signal. The data encoding capacity of the tag is enhanced by using the frequency shift coding technique. The proposed RFID tags have an operating range of 50 cm in the outdoor environment. Theoretical and numerical methods are used to verify the measured resonant frequencies of the tag.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	4762
Ending Page	4770
Page Count	9
File Size	2111141
File Format	PDF
ISSN	0018926X
Volume Number	62
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resonant frequency Encoding Harmonic analysis Radiofrequency identification Impedance Antenna measurements Antennas backscattering and group delay Chipless RFID stepped impedance resonator (SIR)
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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