Coverage and read range comparison of linearly and circularly polarised radio frequency identification ultra-high frequency tag antennas

García, Juan Manuel Méjica; Arriola, Aitor; Casado, Félix; Chen, X.; Sancho, Juan Ignacìo; Valderas, Daniel

doi:10.1049/iet-map.2011.0529

Cited by 21 publications

(10 citation statements)

References 11 publications

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“…The largest number of recent articles is dedicated to the design of the two fundamental elements of an RFID system, that is, the antennas at the reader and the tag [31][32][33]. The reader antenna should generate a strong magnetic field while tag antennas, usually subject to size and shape constraints, should also be robust against angular position and orientation.…”

Section: Antenna Designmentioning

confidence: 99%

Radio Context Awareness and Applications

Reggiani

Fiorina²,

Gezici³

et al. 2013

Journal of Sensors

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The context refers to “any information that can be used to characterize the situation of an entity, where an entity can be a person, place, or physical object.” Radio context awareness is defined as the ability of detecting and estimating a system state or parameter, either globally or concerning one of its components, in a radio system for enhancing performance at the physical, network, or application layers. In this paper, we review the fundamentals of context awareness and the recent advances in the main radio techniques that increase the context awareness and smartness, posing challenges and renewed opportunities to added-value applications in the context of the next generation of wireless networks.

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Section: Antenna Designmentioning

confidence: 99%

Radio Context Awareness and Applications

Reggiani

Fiorina²,

Gezici³

et al. 2013

Journal of Sensors

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“…In Reference , read range comparison study of linearly and circularly polarized tag antenna is carried out, and a 17.9% read range enhancement has been examined with circularly polarized tag antenna. Circularly polarized tag antenna can enhance the performance of an RFID system than a linearly polarized tag antenna due to reduced multipath loss and polarization mismatch loss.…”

Section: Introductionmentioning

confidence: 99%

Linearly tapered meander line cross dipole circularly polarized antenna for UHF RFID tag applications

Bhaskar

Singh

2018

Int J RF Microw Comput Aided Eng

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In this article, a circularly polarized antenna for ultra‐high frequency radio frequency identification (RFID) tag is presented. The circular polarization is realized by two orthogonal, unequal length linearly tapered meander line cross dipoles. The meander structure with capacitive tip loading is used for size miniaturization of the antenna. A modified T‐match network is employed to feed the cross dipole structure. The measured 10‐dB return loss bandwidth of the cross dipole antenna is 17 MHz (908‐923 MHz) and the corresponding 3‐dB axial ratio bandwidth is 6 MHz (912‐918 MHz). The overall size of the proposed antenna is 0.17λ0 × 0.17λ0 at 915 MHz. The maximum read range between the reader and the tag with the proposed antenna is 4.7 m larger than the analogous linearly polarized tag antenna due to the reduction in polarization loss between the tag and reader antennas. Thus, a maximum read range of 15.66 m with the gain of 1.28 dBic is achieved at 915 MHz.

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“…Recent studies have reported promising designs for RFID LP tag antennas mounted on metallic surfaces . However, few of the recently proposed UHF RFID tag antennas could emit CP radiation because of a mismatch in the impedances of the antenna and tag chip …”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12] However, few of the recently proposed UHF RFID tag antennas could emit CP radiation because of a mismatch in the impedances of the antenna and tag chip. [13][14][15][16] The aim of this study was to design a square-ring patch antenna with two pairs of T-shaped slots that produced CP radiation. In most studies, CP radiation was generated by establishing two orthogonal LP modes (90 phase difference) on the radiating patch.…”

Section: Introductionmentioning

confidence: 99%

Low‐profile CP RFID hard tag antenna with short‐circuited microstrip‐fed line mounted on metallic plane

Chen

Huang

2018

Int J RF Microw Comput Aided Eng

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In this study, a circularly polarized (CP) radio frequency identification (RFID) tag antenna with a capacitive short‐circuited microstrip feed line was mounted on a metallic plane. This tag antenna comprised a low‐profile substrate and a square‐ring patch radiator with two pairs of T‐shaped slots that produced CP radiation. A conjugate match to an Alien Higgs‐4 chip with an impedance of 8‐j149 Ω at 925 MHz was obtained by connecting two short‐circuited microstrip lines in series. This article describes a new method for matching CP impendences. The chip impedance can be easily matched by adjusting the length of microstrip lines and by using coupling gaps. Tests of an RFID reader with a linearly polarized (LP) antenna indicated that the CP tag antenna had a low 3‐dB axial ratio bandwidth (921‐930 MHz) and an omnidirectional reading range. In contrast, the LP tag had double null cancelation in the reading region. The proposed CP tag antenna had a similar reading range but a different attached orientation. This antenna tag (and other RFID hard tags) can also be affixed to surfaces with screws, pop rivets, and industrial adhesives. The proposed antenna can be attached to goods transported by freight trucks.

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Coverage and read range comparison of linearly and circularly polarised radio frequency identification ultra-high frequency tag antennas

Cited by 21 publications

References 11 publications

Radio Context Awareness and Applications

Radio Context Awareness and Applications

Linearly tapered meander line cross dipole circularly polarized antenna for UHF RFID tag applications

Low‐profile CP RFID hard tag antenna with short‐circuited microstrip‐fed line mounted on metallic plane

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