An end-fire dipole array for big interrogation zone of near-field RFID

Shen, Lulu; Xiang, Huiling; Tang, Wanchun; Zhuang, Wei; Ma, Jun

doi:10.1109/aps.2015.7305180

Cited by 4 publications

(1 citation statement)

References 3 publications

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“…To keep the currents flowing in a single direction along the loop, some methods such as inserting capacitances [6] or phase‐shifters [7], adopting segmented lines [8, 9] or dipoles [10] are applied to form an electrically large loop, so that strong and uniform z ‐component magnetic field ( H z ) can be generated on the surface. The second type is an NF antenna based on the structure of two closely spaced, oppositely directed currents (ODCs) [11], which can achieve an enhancement of H z for a standing wave structure while keeping it strong and uniform as well [12, 13]. The third type is a travelling wave antenna [14, 15].…”

Section: Introductionmentioning

confidence: 99%

Planar hexagonal broadband near‐field antenna for UHF RFID application

Xing

Sim

et al. 2020

IET Microwaves, Antennas & Propagation

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Section: Introductionmentioning

confidence: 99%

Planar hexagonal broadband near‐field antenna for UHF RFID application

Xing

Sim

et al. 2020

IET Microwaves, Antennas & Propagation

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Study of a Multi-Loop Travelling Wave UHF RFID Near-Field Antenna

Xing

Sim

et al. 2020

IEEE Access

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A multi-loop travelling-wave ultra-high frequency (UHF) radio frequency identification (RFID) near-field antenna (NFA) is proposed and investigated. To achieve strong and uniform magnetic field, as well as extendable reading range, multiple λ/2 rectangular loop structures printed on both sides of an FR4 substrate is adopted. Via the RFID system measurement for magnetic field distribution, the maximum reading range of the proposed NFA is 11 cm, and its corresponding 100% reading rate distance is 5 cm. Here, broad 10-dB impedance bandwidth of 18.7% (816-984 MHz) was measured, which can cover both ETSI (European Telecommunication Standards Institute) and FCC (Federal Communications Commission) bands. Parametric studies are further carried out to facilitate the design and optimization processes.INDEX TERMS UHF RFID, near-field antenna, travelling wave, multiple loop.

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