Design of Antennas for UHF RFID Tags

Perret, Etienne; Tedjini, Smaïl; Nair, Raji Sasidharan

doi:10.1109/jproc.2012.2186950

Cited by 62 publications

(41 citation statements)

References 16 publications

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“…The power reflection coefficient is adapted to deal with the complex impedance of the tag antenna and the chip. The power reflection coefficient denotes as follows [9]: Figure 2 shows the effect of the geometry of the T-matching structure on the power reflection coefficient. It can be seen that there are two resonant frequency bands caused by the Hilbert fractal structure and the spiral structure.…”

Section: Introductionmentioning

confidence: 99%

A Broadband Design of Uhf Fractal Rfid Tag Antenna

Shi¹,

Fang²,

Kang³

et al. 2016

PIER Letters

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Abstract-In this paper a broadband radio frequency identification (RFID) tag antenna for the ultrahigh-frequency (UHF) band is designed. The proposed antenna consists of a first-order Hilbert fractal structure and a spiral structure. In order to ensure the conjugate matching between the tag antenna and the electronic chip, a T-matching structure is employed. The interaction between two radiating elements makes the proposed antenna a fractional bandwidth of 20% over the frequency range of 820 MHz-1010 MHz and a small size of 0.2092λ 0 × 0.099λ 0 . Simulated and measured results validate the good performance of the designed tag antenna.

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Section: Introductionmentioning

confidence: 99%

A Broadband Design of Uhf Fractal Rfid Tag Antenna

Shi¹,

Fang²,

Kang³

et al. 2016

PIER Letters

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“…A survey of the history of RFID is presented in [9] and a comprehensive introduction to today's systems and standardization is provided in [10]- [13]. Finally, a thorough discussion of the design of antennas for RFID tags can be found in [14] [15].…”

Section: Introductionmentioning

confidence: 99%

“…In healthcare and access control domain, wearable RFID has also great potential to reduce the risk of accidents for instance in kindergartens, hospitals and old age homes by providing real-time location information of people [15] [16]. Additional information can be collected with RFID sensor tags.…”

Section: Introductionmentioning

confidence: 99%

Impact of recurrent washing on the performance of electro-textile UHF RFID tags

Björninen¹,

Virkki

Sydänheimo³

et al. 2014

2014 IEEE RFID Technology and Applications Conference (RFID-TA)

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We present the simulation-based design of UHF RFID tags based on electro-textile antennas and analyze the impact of recurrent washing on their performance through measurements. The antennas were fabricated from silver plated stretchable fabric made of nylon and elastic fibers. We coated half of the tested samples with acrylic spray to compare the influence of recurrent washing on the performance of the coated and uncoated tags. The fully functional tags including the microchip were washed ten times in a household washing machine using a typical 40°C program and detergent. The performance of the tags was measured after each wash. Prior washing, the peak read ranges of the tags were over 5.5 m. After ten washing cycles, the read ranges of coated and non-coated tags were 1.5 m and 2.8 m, respectively.

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“…Among others, in electromagnetic engineering [3] and especially for antennas [4] evolutionary computation is used for design determination and optimization. As a next step, evolutionary optimization strategies can be applied for UHF RFID antenna design [5]. By connecting EM field simulation and global optimization, unintuitive planar antenna topologies, perfectly adapted to their environment, can be derived in an automated process [6] [7].…”

Section: Introductionmentioning

confidence: 99%

Examples for Genetic Algorithm based optimal RFID tag antenna design

Pichler¹,

Steffelbauer

Nazarov³

2014

2014 IEEE RFID Technology and Applications Conference (RFID-TA)

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In this work a Genetic Algorithm is used to obtain optimal planar UHF RFID tag antenna topologies. The presented antenna design method is automated and solely requires very little human intervention.Different requirements like antenna dimension, conductive and dielectric materials, frequency range, etc. can be adjusted. This enables the automated design of tailored tag antennas for different requirements.Due to the complex behavior of UHF antennas numerical electromagnetic field simulation is essential. Simulation is carried out with the aid of ANSYS HFSS and ANSYS DESIGNER. In order to obtain meaningful results, high accuracy of the simulation is of vital importance. Therefore this work places emphasis on the comparison of simulation and measurement of prototypes.As a result of the evolutionary design, examples for narrowband and broadband antennas are presented. Two approaches were applied, one very fundamental, discretizing the available design space into pixel units. In addition a lattice based approach, promoting meander-like layouts, is implemented. Four antenna layouts are discussed in this work. All obtained tag antennas meet the required specifications and prove the abilities of the design approach.

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Design of Antennas for UHF RFID Tags

Cited by 62 publications

References 16 publications

A Broadband Design of Uhf Fractal Rfid Tag Antenna

A Broadband Design of Uhf Fractal Rfid Tag Antenna

Impact of recurrent washing on the performance of electro-textile UHF RFID tags

Examples for Genetic Algorithm based optimal RFID tag antenna design

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