Combined RFID tag antenna for recipients containing liquids

Quiroz, Rafael; Alvès, Thierry; Poussot, Benoît; Laheurte, Jean‐Marc

doi:10.1109/rfid-ta.2012.6404491

Cited by 4 publications

(5 citation statements)

References 13 publications

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“…The measured chip read sensitivity and input impedance are − 14.7 dBm and 1100 //2.11 pF, respectively [6]. The module is self resonant at 930MHz as shown experimentally in [6]. This non-radiating module is used for short-range communications based on the near-field coupling with the reader antenna.…”

Section: Description Of the Uhf Rfid Modulementioning

confidence: 87%

Bandwidth enlargement of inductively-coupled UHF RFID tag antennas based on a dual-dipole topology

Alvès¹,

Quiroz²,

Laheurte³

2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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In UHF RFID (Radio Frequency Identification), passive tag antennas are usually fixed on textiles, boxes or recipients which nature and contents might vary. These variations strongly affect the antenna performance. A combined antenna showing wideband characteristics is proposed to ensure an effective read-range for moderate variations of the dielectric permittivity and thickness of the tagged items. A prototype realized on Kapton is measured and tested on a plastic support.

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Section: Description Of the Uhf Rfid Modulementioning

confidence: 87%

Bandwidth enlargement of inductively-coupled UHF RFID tag antennas based on a dual-dipole topology

Alvès¹,

Quiroz²,

Laheurte³

2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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“…The cross‐section with the chip reactance indicates that the theoretical resonance of the module is in the upper part of the world UHF RFID band 860–960 MHz. It also shows that according to the series to parallel resonance transformation resulting from the inductive coupling [10], the antenna reactance is essentially an attenuated parallel resonance impressed on the loop response. On the other hand, the very small loop radiation resistance (few tenths of ohms) is strongly increased to 35 Ω at resonance (Fig.…”

Section: Tag Designmentioning

confidence: 99%

“…The circuit is encapsulated in a rectangular housing made of FR4 epoxy. This module must be magnetically coupled with an antenna to provide an effective radiation as the radiation resistance of the encapsulated loop is very small ( < 1 Ω) [10]. The 6 mm diameter loop is made of a 0.6 mm large copper microstrip.…”

mentioning

confidence: 99%

Metal mount RFID tag antenna excited by integrated loop/IC module

Quiroz¹,

Laheurte²

2013

Electron. lett.

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A simple topology is described for radio frequency identification (RFID) tags mountable on metal surfaces. The tag is built around a commercial UHF RFID module combining an IC and a coupling loop. The module is placed in the neighbourhood of a slot which is used both to couple the energy from the module to the patch-like antenna and to miniaturise the tag. A read range of almost 4 m is obtained in the 865-868 MHz band with a 1.6 mm low-cost FR4 substrate.Introduction: There is strong interest from many industries in tagging metal items (airplane or automotive parts, metal containers, shelves, pipes etc.) with the UHF RFID technology. The thicknesses of the published designs vary from 170 μm [1] to 1 cm [2] and even more. For the tracking of large high value assets, relatively bulky tags are acceptable to guarantee the required performance and thick antennas ( > 3 mm) can protrude from the mounting surface [2]. Ultra-low-profile metal tags whose thicknesses fall into the sub-mm range (down to 200 μm) are required for flat items to achieve an aesthetic integration (e.g. the thickness of the latest Apple MacBook Air is 3 mm), but only when short read ranges ( < 1 m) are acceptable [1,3]. Antenna thicknesses about 1-2 mm also find applications in numerous use cases, for instance when the tags should be curved for mounting on metallic cylinders (e.g. gas tanks and fire extinguishers) while providing medium to long read ranges (from 3 to 9 m) depending on the substrate characteristics [4,5].The read range degradation is inescapable when the tags are placed above large metallic surfaces especially for small antenna thicknesses. This flows from the simultaneous drop of the antenna efficiency and detuning of its input impedance due to the high parasitic capacitance between the metallic surface and the antenna. Apart from effective multiple folded dipole [6] configurations, most solutions are based on patch type or inverted-F type designs. These antennas use shorting-pins or shorting-walls. It makes their fabrication cost higher than that of normal label-type antennas and excludes them from low-cost mass production with inexpensive materials. In this Letter, we propose a simple design for a cost-effective metal tag dedicated to medium reading distances (up to 4 m) working in the European band (865)(866)(867)(868). This tag uses a module combining a loop excitation and an RFID chip. Performances are competitive with published designs of mid-range tags built on FR4 for equivalent antenna volumes and chip sensitivity, but without shorting points.

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“…Therefore, there is a need for the design of RFID tag antennas for general RFID applications. So far, various types of RFID tag antennas have been reported in the literature [6][7][8][9][10][11][12]. For example in [6] the authors provide only the read range of the RFID tag antenna mounted on paper reel.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, the authors in [8] study the effect of different materials on the reading range of the RFID tag antenna. Different RFID tag antennas in UHF band have been proposed in literature operating on metallic objects [9], liquid solutions [10][11] and for on body applications [12]. However, most of the proposed tag antennas are suitable for a specific application which could limit their versatility.…”

Section: Introductionmentioning

confidence: 99%

Design and Characterization of a Compact Single Layer Modified S-Shaped Tag Antenna for UHF-RFID Applications

Ennasar

Aznabet

Mrabet

et al. 2019

AEM

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In this paper, we report the design of a new compact single layer modified S-shaped tag antenna for UHF-RFID applications. To achieve a compact size of 51×34 mm2 for this tag antenna, the technique of using S shaped strip is applied, and by further adding a pair of equilateral triangular stubs into this structure, good impedance matching can be obtained at 915 MHz, which is the center frequency of the North-American UHF-RFID band (902 to 928 MHz). Besides exhibiting acceptable 5m read range in free space at 915 MHz, the proposed design shows a read range of about 4.5 when mounted on a metallic object (200 ×30 cm2) separated by spacer foam of thickness 1 cm. Furthermore, the proposed design shows a reasonable read ranges when it is mounted on different dielectrics with low permittivity. The proposed design has a simple configuration, low cost, acceptable read range, and can work on various background materials.

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Combined RFID tag antenna for recipients containing liquids

Cited by 4 publications

References 13 publications

Bandwidth enlargement of inductively-coupled UHF RFID tag antennas based on a dual-dipole topology

Bandwidth enlargement of inductively-coupled UHF RFID tag antennas based on a dual-dipole topology

Metal mount RFID tag antenna excited by integrated loop/IC module

Design and Characterization of a Compact Single Layer Modified S-Shaped Tag Antenna for UHF-RFID Applications

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