Chipless RFID Tag Based on Electrically Small Spiral Capacitively Loaded Dipole

This letter presents the novel 20 bit chipless radiofrequency identification transponder (tag) based on spiral capacitively loaded dipole scatterers of electrical size ka = 0.47, radar cross-section (RCS) σ = -29.3 dBsm, and bandwidth BW 3dB = 20.9 MHz. It outperforms U-folded dipole scatterer (ka =...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2017-01, Vol.16, p.3051-3054
Main Authors: Havlicek, Jaroslav, Svanda, Milan, Polivka, Milan, Machac, Jan, Kracek, Jan
Format: Article
Language:English
Subjects:
Bandwidth
Bandwidths
Capacitively loaded (C-loaded) dipole
chipless radio-frequency identification (RFID)
Dipoles
electrically small dipole
Encoding
Frequency stability
Mutual coupling
Radar cross sections
radar cross-section (RCS)
Radio frequency
Radio frequency identification
Radiofrequency identification
Resonant frequency
scatterer
Spirals
Stability analysis
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Summary:This letter presents the novel 20 bit chipless radiofrequency identification transponder (tag) based on spiral capacitively loaded dipole scatterers of electrical size ka = 0.47, radar cross-section (RCS) σ = -29.3 dBsm, and bandwidth BW 3dB = 20.9 MHz. It outperforms U-folded dipole scatterer (ka = 0.79, σ = -34.3 dBsm, BW 3dB = 18.1 MHz) in the first two parameters in exchange for a slight increase in bandwidth. The total tag size (17 × 68 mm 2 ) is roughly half the size of a credit card. The frequency and amplitude stability of its RCS response, when the zero bit information is coded via removal of individual scatterers, is improved by reordering scatterers in the array. The simulated results were verified by the monostatic measurement of tag RCS.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2017.2760059