Characterizations and Optimization Techniques of Embroidered RFID Antenna for Wearable Applications

Liu, Yulong; Yu, Miao; Xu, Lulu; Li, Yang; Ye, Terry Tao

doi:10.1109/jrfid.2019.2961189

Cited by 22 publications

(8 citation statements)

References 16 publications

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“…For a constant temperature, the read range follows a normal distribution with a sharp peak at the resonant frequency. However, as the temperature increases, the graph is skewed with the same normal distribution with slightly lesser read range values [44][45][46][47][48][49][50][51][52][53][54]. General structure of PTFE sensing antenna is depicted in Figure 6.…”

Section: Performance Evaluation Of Ermal Sensitivity Betweenmentioning

confidence: 99%

Characterization of Composite RFID Antennas Based on Thermal Properties: A Survey

Varadhan

Chamatu

Subramanian

2021

Advances in Materials Science and Engineering

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In this paper, a comprehensive survey on thermal and geometric design parameters of composite materials utilized in the fabrication of modern RFID systems has been discussed mainly due to its advantages such as lightweight and high strength. Designing of RF antenna setup requires careful consideration of material, geometric and fabrication parameters. Polymer materials were chosen as the substrate and subjected to extensive studies to determine and predict the capability of the miniaturized RFID antenna. The effect of the polymer matrix composite (PMC) material on the antenna parameters such as gain, bandwidth, and return loss is analyzed and realized that improvement in bandwidth and perfection in impedance matching can be further accomplished by employing fractal structure. It is also discovered that the thermal properties affect the impedance and operating frequencies, thus enabling multilayer PMC deploying fractal structured RFID antennas to be used for many applications such as logistics, aerospace, biomedical, and mining.

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Section: Performance Evaluation Of Ermal Sensitivity Betweenmentioning

confidence: 99%

Characterization of Composite RFID Antennas Based on Thermal Properties: A Survey

Varadhan

Chamatu

Subramanian

2021

Advances in Materials Science and Engineering

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“…As the antenna aperture is a direct function of an electrically-small antenna's size [36], both the tag's read-range and the antenna's read range need to be considered. To evaluate the performance of the proposed tag antenna, and compare it to commercially available UHF RFID tags and antennas reported in References [14,16,27,37], a Figure of Merit (FoM) is defined in (6) as a function of the read-range R in m normalized to the antenna's area A in m 2 . This FoM is defined as it is directly linked to the antenna's aperture efficiency.…”

Section: Tag Read-range Testmentioning

confidence: 99%

“…Although a more complex RFID design such as the 3D printed cavity resonator in Reference [27] can achieve a higher read-range of up to 26 m, it occupies a significantly larger area and is non-planar, making it unsuitable for e-textile applications. Furthermore, the proposed thin polyimide filament allows seamless integration of the antenna in textiles without affecting the user's comfort, where other textile antennas [14,16,37] utilize thick embroidered conductors or e-textiles which affect the fabric's appearance and the user's comfort. The method for weaving the antenna filmanet into the textile has been previously reported in References [2,28].…”

Section: Fom =mentioning

confidence: 99%

Reliable UHF Long-Range Textile-Integrated RFID Tag Based on a Compact Flexible Antenna Filament

Wagih

Wei

Komolafe

et al. 2020

Sensors

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This paper details the design, fabrication and testing of flexible textile-concealed Radio Frequency Identification (RFID) tags for wearable applications in a smart city/smart building environment. The proposed tag designs aim to reduce the overall footprint, enabling textile integration whilst maintaining the read range. The proposed RFID filament is less than 3.5 mm in width and 100 mm in length. The tag is based on an electrically small (0.0033 λ 2 ) high-impedance planar dipole antenna with a tuning loop, maintaining a reflection coefficient less than −21 dB at 915 MHz, when matched to a commercial RFID chip mounted alongside the antenna. The antenna strip and the RFID chip are then encapsulated and integrated in a standard woven textile for wearable applications. The flexible antenna filament demonstrates a 1.8 dBi gain which shows a close agreement with the analytically calculated and numerically simulated gains. The range of the fabricated tags has been measured and a maximum read range of 8.2 m was recorded at 868 MHz Moreover, the tag’s maximum calculated range at 915 MHz is 18 m, which is much longer than the commercially available laundry tags of larger length and width, such as Invengo RFID tags. The reliability of the proposed RFID tags has been investigated using a series of tests replicating textile-based use case scenarios which demonstrates its suitability for practical deployment. Washing tests have shown that the textile-integrated encapsulated tags can be read after over 32 washing cycles, and that multiple tags can be read simultaneously while being washed.

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“…e unconventional shape requirements of antenna may come from different scenarios. For example, RFID tags are embedded inside bottle caps as a measure of anticounterfeiting; antennas can be conformal to the shapes of component parts on the assembly line; and in many garment deployment applications, antennas can be embroidered on apparels [6], so antennas can be conceived as logos or decorative patterns.…”

Section: Introductionmentioning

confidence: 99%

“Unconventionally Shaped” Antenna Design for UHF RFID Tags

Wang

Liu

2021

International Journal of Antennas and Propagation

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UHF RFID tags need to be attached or embedded into various objects. Unlike traditional free-standing antennas, UHF antenna shapes and form factors may vary significantly. There have been no systematic methods that facilitate the design practice of antenna with unconventional shapes. In this paper, using the geometries of 26 English letters (in capital) as examples, we explore the general methodology of shape-specific antenna design. More specifically, we show that 26 letter geometries can be categorized into 9 groups, and the antennas in each group can be divided and conquered into standard baseline geometries. Through prototypes and measurements, we demonstrate that each letter-shaped antenna, although exhibiting different gains and radiations, can achieve satisfactory performance, as compared to standard UHF dipole antennas. Specifically, letters “M” and “J” achieve the longest reading range of more than 20 meters with a good radiation pattern, which is comparable or even better than many commercial UHF RFID tags.

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Characterizations and Optimization Techniques of Embroidered RFID Antenna for Wearable Applications

Cited by 22 publications

References 16 publications

Characterization of Composite RFID Antennas Based on Thermal Properties: A Survey

Characterization of Composite RFID Antennas Based on Thermal Properties: A Survey

Reliable UHF Long-Range Textile-Integrated RFID Tag Based on a Compact Flexible Antenna Filament

“Unconventionally Shaped” Antenna Design for UHF RFID Tags

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