Novel circular polarization antenna for UHF RFID application

Liu, Yusha; Liu, Qi; Hu, Jun

doi:10.1109/imsna.2013.6743446

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…1. The CP tag antenna comprises two meandered dipole antennas which are individually designed in advance by referring to the method proposed in [16] and [17]. Phases of the input impedance for the two dipole antennas are set to +45 • and −45 • , respectively.…”

Section: Cp Tag Antenna Design and Analysis In Free Spacementioning

confidence: 99%

Design of Circularly Polarized Tag Antenna With Artificial Magnetic Conductor for on-Body Applications

Hong¹,

Chiu²,

Wang³

2018

PIER C

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This paper presents a circularly polarized tag on a 3 × 3 AMC structure to obtain longer read range for UHF RFID on-body applications. A modified T-matching transformer is employed to achieve conjugate matching with the Monza 4 microchip. To overcome the influence of lossy human body, a cross-dipole tag antenna is directly implemented on the phase-dependent AMC structure to achieve high gain and isolate the influence of the human body. Then, the tag is pasted on a lossy human model to investigate its performance. The study finds that the AMC can increase the antenna gain by 3.34 dB and help generate circularly polarized (CP) wave. The measured fractional bandwidth of impedance is 3.2% which can cover the UHF RFID bands of North America and Taiwan. The measured read range of the tag pasted on a human body reaches 15.7 meters when the reader has 4W EIRP, and the sensitivity of the microchip is −16.7 dBm.

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Section: Cp Tag Antenna Design and Analysis In Free Spacementioning

confidence: 99%

Design of Circularly Polarized Tag Antenna With Artificial Magnetic Conductor for on-Body Applications

Hong¹,

Chiu²,

Wang³

2018

PIER C

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Design of a planar slot tag antennas with circular polarization for ultra‐high frequency radio frequency identification applications

Abdallah

Egels

Bergeret

et al. 2018

Micro & Optical Tech Letters

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Slot radio frequency identification (RFID) Tag antennas designed for ultra‐high frequency (UHF) band are presented. Two orthogonal slots are used to achieve circular polarization (CP). By selecting an appropriate length of feed‐lines, the input impedance of the tag antenna can be controlled. Experimental results show a good reading range between 9 m and 10 m. A wide band CP band was measured. The design procedure for the proposed antennas are described and the performances are presented and discussed.

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