Design of planar RFID tag antenna for metallic objects

Cho, C.; Choo, Hosung; Park, I.

doi:10.1049/el:20083712

Cited by 79 publications

(37 citation statements)

References 3 publications

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“…A planar inverted-F antenna (PIFA) or microstrip patch antenna is an attractive choice for tagging metallic objects [9][10][11][12], but they are usually considerably more expensive and not low profile. Several passive UHF RFID tags specifically tuned for mounting on metal have been recently described in the literature [13][14][15], patented [16,17] , or produced commercially.…”

Section: Introductionmentioning

confidence: 99%

Thin ultra high-frequency platform insensitive radio frequency identification tags

Ziai

Batchelor

2010

IET Microw. Antennas Propag.

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Section: Introductionmentioning

confidence: 99%

Thin ultra high-frequency platform insensitive radio frequency identification tags

Ziai

Batchelor

2010

IET Microw. Antennas Propag.

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“…In some practical applications, the tags need to be attached on electrically metallic objects' surface. But these metallic environments have a significant effect on nearby electromagnetic fields, and this effect changes antenna's radiation pattern, input impedance, radiation efficiency and resonant frequency [7,8]. Therefore, the design of RFID tag for metallic usage, such as containers, notebooks, and cars, is a challenge, especially when tags attached to those objects like bottle and gas cylinders which have a curved metallic surface.…”

Section: Introductionmentioning

confidence: 99%

A Slim Wideband and Conformal Uhf Rfid Tag Antenna Based on U-Shaped Slots for Metallic Objects

2013

PIER C

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Abstract-A slim wideband patch antenna designed for the ultrahigh frequency (UHF) band radio frequency identification (RFID) tag is presented in this paper, which can be mounted on flat or curved metallic surfaces directly. The presented antenna is fabricated on a very thin (only 0.5 mm) and low-cost PET substrate (ε r = 3.8, tan δ = 0.02). The proposed design consists of tow coplanar patches radiation unities which are electrically connected to the metallic ground through two symmetrical shorting walls placed at both edge sides of the patches. Double symmetrical U-shaped slots are etched out to improve the antenna bandwidth. A perfect matching between antenna and tag chip can be easily obtained by varying the geometry parameters of the slots. The simulated bandwidth is about 97 MHz, which covers the Europe and North America UHF RFID frequency range. The measured maximum reading range of the proposed antenna can be up to 5 m when the tag is mounted on a metal plate whose size is 150 × 150 × 8 mm 3 .

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“…Especially, tags used in this application should have stable reading characteristics with low performance degradation by various nearby target objects. To date, several studies have reported reductions in this readability degradation [2,3]. For example, a method for addition of a ground plate has been introduced, but this rigid multilayer structure usually results in higher manufacturing costs and limits application of this method to stiff targets only [2].…”

Section: ⅰ Introductionmentioning

confidence: 99%

“…For example, a method for addition of a ground plate has been introduced, but this rigid multilayer structure usually results in higher manufacturing costs and limits application of this method to stiff targets only [2]. Some researchers have inserted an absorbing layer to remedy the field perturbation caused by nearby target objects, but this method reduces the radiation efficiency of the tag, resulting in a short reading distance [3].…”

Section: ⅰ Introductionmentioning

confidence: 99%

Design of a Flexible Planar RFID Tag Antenna with Low Performance Degradation from Nearby Target Objects

Choo¹,

Ryoo²,

Choo³

2011

Journal of electromagnetic engineering and science

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In this letter, we propose a novel tag antenna that has low performance degradation with nearby dielectric material. We obtained a stable reading performance and a broad matching bandwidth on nearby dielectric materials by employing a T-matching network with thick line width and capacitively slot-loaded arms. We then built the proposed antenna and measured the tag sensitivity to examine the reading characteristics with nearby dielectric materials. The measured results clearly demonstrate stable tag sensitivity with various nearby dielectric materials, such as foam, acrylic-plastic, glass, and ceramic plates. To more closely observe the antenna characteristics with nearby dielectric materials, we also examined the impedance variation and surface current distribution with respect to the dielectric constant of nearby target objects, which ranged from 1×ε0 to 16×ε0.

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Design of planar RFID tag antenna for metallic objects

Cited by 79 publications

References 3 publications

Thin ultra high-frequency platform insensitive radio frequency identification tags

Thin ultra high-frequency platform insensitive radio frequency identification tags

A Slim Wideband and Conformal Uhf Rfid Tag Antenna Based on U-Shaped Slots for Metallic Objects

Design of a Flexible Planar RFID Tag Antenna with Low Performance Degradation from Nearby Target Objects

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