Design and Implementation of Electro-Textile Ground Planes for Wearable UHF RFID Patch Tag Antennas

Koski, Karoliina; Vena, Arnaud; Sydänheimo, Lauri; Ukkonen, Leena; Rahmat‐Samii, Y.

doi:10.1109/lawp.2013.2276007

Cited by 72 publications

(31 citation statements)

References 6 publications

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“…Flexible tags based on a 120mmx9mm Tmatched dipole [127], a YJ kindergarten logo [128], and a 130mmx37mm antenna by the shape of "RFID" alphabetic characters [129], where realized by using twisted electrothreads and characterized (in free-space) in terms of antenna return loss and tag read range pattern. In [130], several electro-textiles have been considered to realize the 150mmx90m ground plane of a rectangular patch (the patch is made of copper on a 3.175mm thick Rogers RT/Duroid substrate). Read range performance for six embroidered ground planes, with different thread densities and sewing patterns (Shieldex electro-threads and cotton fabric have been used), and four LessEMF conductive fabrics (copper polyester taffeta fabric, argenmesh fabric, ripstop silver fabric, and stretch fabric), have been compared with those achievable by a conventional copper ground plane.…”

Section: B Wearable Antennas For Uhf-rfid Transpondersmentioning

confidence: 99%

Wearable Antennas for Off-Body Radio Links at VHF and UHF Bands: Challenges, the state of the art, and future trends below 1 GHz

Nepa

Rogier

2015

IEEE Antennas Propag. Mag.

108

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Abstract-An in-depth survey of wearable antennas for offbody radio links in the VHF and UHF frequency bands (below 1 GHz) is presented. The review encompasses distinctive specifications, design criteria and challenges, material characterization procedures, antenna topologies and technologies, multi-antenna systems, dedicated testing procedures, applications and future trends.Index Terms-Wearable antennas, body-worn antennas, textile antennas, embroidered antennas, VHF antennas, UHF antennas, antennas for body-centric communications, antennas for body area networks, antennas for personal area networks, antennas for off-body wireless communications. I. INTRODUCTIONhere are several existing and forthcoming wireless applications that either require or can benefit from one or more antennas that are directly stitched on a piece of clothing or a garment, or integrated into a personal accessory (such as shoes, glasses, buttons, helmets). These antennas are usually referred to as body-worn antennas, textile antennas, BAN (Body Area Network) antennas, antennas for body-centric communications, wearable antennas. The last term is the one that is going to be used in this paper, as it denotes any antenna that is small and light enough to be worn or carried on one's body.In the last decades, hundreds of scientific papers on wearable antennas have been published in the open literature [1]- [8]. Therefore, for the sake of completeness and clarity, a valuable analysis of the state-of-the-art on wearable antennas should be limited to antennas for a specific application, a given frequency range, or a chosen antenna technology. In this context, the present review focuses on wearable antennas operating in the VHF band and part of the UHF frequency band (below 1 GHz). Choosing 1 GHz as an upper boundary for this review is highly relevant, as the operating frequency is usually the main parameter to discriminate among available antenna topologies, technologies and characterization techniques. Moreover, we limit our discussion on antennas for off-body radio links, also excluding antennas integrated into mobile terminals/cases and operating close to the body. Specifically, only wearable antennas that can be used separately from the radio unit are of interest here.VHF/UHF wearable antennas are mostly used in professional mobile radio communications for soldiers, emergency operators and law-enforcement personnel. VHF As far as VHF/UHF wearable antennas are concerned, many of their distinctive features are related to the fact that the corresponding free-space wavelength (with 30cm<<10m when 30MHz

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Section: B Wearable Antennas For Uhf-rfid Transpondersmentioning

confidence: 99%

Wearable Antennas for Off-Body Radio Links at VHF and UHF Bands: Challenges, the state of the art, and future trends below 1 GHz

Nepa

Rogier

2015

IEEE Antennas Propag. Mag.

108

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“…These lead to the textile looking like a solid one so that it is reasonable to imitate it by the conventional design. Besides, the conventional antenna can be made into textile one using the methods mentioned in [1][2][3][4][5]8]. Therefore, in this paper, the broken situation is imitated by slicing the ground plane of the conventional patch antenna.…”

Section: Introductionmentioning

confidence: 99%

The Strip-Ground Rectangular Patch Antenna

Wang

2017

International Journal of Antennas and Propagation

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To imitate the broken situation of the conductive threads of the wearable antenna, a strip-ground design of rectangular patch antenna with the conventional substrate is presented to investigate the change of the antenna performance, where the ground is sliced along its -plane. The strips are symmetrical along the center line of the width of the patch, and the gap ratio of the gap to the solid ground varies with the change of gaps. The conventional patch antenna is used as a reference for comparison with the stripe-ground antennas. And the effect of the coaxial cable, the changes of the impedance, and the cross-polarization of the antenna are investigated. Several antenna prototypes are fabricated and their measured results are in good agreement with the simulations. These results show that the gaps change the performance of the strip-ground antennas, but they can work well if the gap ratio is less than 1 : 4.

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“…Applications include mobile communications, wireless medical monitoring/diagnosing and military applications [3], [4]. Besides conventional antenna requirements, wearable antennas are expected to be flexible, lightweight, low-cost and garment-integratable [5], [6]. As a result, conductive textiles have been emerging as one of the most promising conducting materials [7], [8].…”

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confidence: 99%

A Modular Textile Antenna Design Using Snap-on Buttons for Wearable Applications

Chen

Kaufmann

Ranasinghe

et al. 2016

IEEE Trans. Antennas Propagat.

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Authors and/or their employers shall have the right to post the accepted version of IEEE-copyrighted articles on their own personal servers or the servers of their institutions or employers without permission from IEEE, provided that the posted version includes a prominently displayed IEEE copyright notice (as shown in 8.1.9.B, above) and, when published, a full citation to the original IEEE publication, including a Digital Object Identifier (DOI). Authors shall not post the final, published versions of their articles.

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Design and Implementation of Electro-Textile Ground Planes for Wearable UHF RFID Patch Tag Antennas

Cited by 72 publications

References 6 publications

Wearable Antennas for Off-Body Radio Links at VHF and UHF Bands: Challenges, the state of the art, and future trends below 1 GHz

Wearable Antennas for Off-Body Radio Links at VHF and UHF Bands: Challenges, the state of the art, and future trends below 1 GHz

The Strip-Ground Rectangular Patch Antenna

A Modular Textile Antenna Design Using Snap-on Buttons for Wearable Applications

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