Fabrication of embroidered UHF RFID tags

Koski, Eveliina; Koski, Karoliina; Björninen, Toni; Babar, A. Ali; Sydänheimo, Lauri; Ukkonen, Leena; Rahmat‐Samii, Y.

doi:10.1109/aps.2012.6349381

Cited by 22 publications

(19 citation statements)

References 3 publications

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“…The embroidering aspects of Ultra High Frequency (UHF) Radio-Frequency Identification (RFID) antenna were presented in [40]. Professor Volakis and his colleagues have contributed to the field of embroidered antennas and RF electronics [41][42][43][44][45][46][47][48].…”

Section: Embroiderymentioning

confidence: 99%

Embroidery and Related Manufacturing Techniques for Wearable Antennas: Challenges and Opportunities

et al. 2014

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This paper will review the evolution of wearable textile antennas over the last couple of decades. Particular emphasis will be given to the process of embroidery. This technique is advantageous for the following reasons: (i) bespoke or mass produced designs can be manufactured using digitized embroidery machines; (ii) glue is not required and (iii) the designs are aesthetic and are integrated into clothing rather than being attached to it. The embroidery technique will be compared to alternative manufacturing processes. The challenges facing the industrial and public acceptance of this technology will be assessed. Hence, the key opportunities will be highlighted.

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Section: Embroiderymentioning

confidence: 99%

Embroidery and Related Manufacturing Techniques for Wearable Antennas: Challenges and Opportunities

et al. 2014

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“…The same layout has been afterwards further developed in [21] (Fig. 4c) with comparable performance to the previous [14]; (b) two-element slotcoupled shorted-patch structure [16]; (c) quarter-wavelength patch tag on a felt substrate [21]; (d) miniaturized wearable folded patch tag on EPDM foam substrate [23] and (e) body-worn RFID-folded dipole [24]; body-worn RFID embroidered textile dipole [25].…”

Section: Characteristics Of Wearable Tags and State Of The Artmentioning

confidence: 99%

“…The growing interest in RFID antennas, which can be perfectly integrated into clothes, is the basis of recent studies conducted in [25][26][27], where highly flexible dipoles are fabricated by means of embroidery techniques and directly sewed into textiles (Fig. 4f).…”

Section: Characteristics Of Wearable Tags and State Of The Artmentioning

confidence: 99%

Flexible and Conformable Antennas for Body-Centric Radiofrequency Identification

Lodato¹,

Manzari²,

Occhiuzzi³

et al. 2014

Innovation in Wearable and Flexible Antennas

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The fast growth of radiofrequency identification (RFID) research is currently exploring new applications for body-centric systems where flexible, miniaturized and conformal antennas are required for placement over the human body and implantation inside limbs and internal organs. When compared with conventional antennas for body-centric purpose, the design of RFID tags involve additional challenges related to the absence of local power source and, in some cases, to the close interaction with the interrogating unit.This chapter reviews the state of the art in the design and experimentation of flexible and conformable antennas for body-centric RFID applications with great attention to the definition of the performance parameters, the achievable read range, and finally, the technology solutions. For the most challenging family of implantable antennas, two cases study are given concerning design and experimentation of tags for orthopaedic limb prosthesis and for vascular implants.The RFID body-centric communication modalities can involve off-body, onbody and through-the body links (Fig. 1). The off-body communication could be useful for locating and monitoring people inside buildings, by means of fixed readers placed in different rooms, or by an on-body reader and ambient disseminated tags [1]. A possible application is the access control in dangerous or restricted areas. The on-body link, wherein the reader antenna is placed over the body, is instead typical of unusual scenarios, where a fixed communications infrastructure is missing. This could be the case of a sportsman, a soldier, or a fireman equipped with different RFID sensors (inside a garment), interrogated by the user's handheld standard communicator in harsh environments [2,3]. Finally, the most challenging architecture is the through-the body link wherein a tag is implanted inside the human body to realize 'augmented' prosthesis or artificial organs, adding communication and sensing capabilities [4,5] in order to store into the device itself detailed information about model, the surgery event as well as to collect data about its health state. Accordingly, doctors and surgeons will be enable to track the medical process after the surgeryevent, thus reducing risk of mistake or early anomalous events, as well as to monitor the status of the implant in the surgery's follow-up.This chapter reviews the state of the art in the design and experimentation of wearable and implantable RFID antennas used as harvesting modules of an RFID tag, with great attention to the definition of the performance parameters, the achievable read range, and finally, the technology solutions to achieve flexible and conformal elements suited to be embedded into clothes, as well into existing biomedical devices. For the most challenging family of implantable antennas, two Figure 1: Sketch of RFID-powered body-centric system with wearable tags (WT) and implanted tags (IT) placed over and inside the human body, and interrogated by one or more RFID readers (R).

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“…We have hence fabricated [5] and studied six different ground-plane structures, including squared structures with varying densities [ Fig. 1 silver fabric (silver coated onto nylon); and stretch fabric (silver plated 76% nylon 24% elastic fiber).…”

Section: Electro-textile Ground Planesmentioning

confidence: 99%

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

Koski

Vena

Sydänheimo

et al. 2013

Antennas Wirel. Propag. Lett.

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Localization, wireless monitoring, and emerging body-centric wireless systems demand low-cost and low-power devices that are efficient, maintenance-free, and comfortable to wear. Patch-type UHF radio frequency identification (RFID) tag antennas realized using electro-textiles are promising candidates for this purpose. In this letter, we design a patch-type tag antenna operating at 900 MHz and investigate how different types of ground planes using electro-textiles affect the antenna performance. Various conductive fabrics and embroidery structures are considered. We demonstrate that depending on the ground plane structure and density, it is possible to influence the tag impedance behavior and radiation characteristics. Furthermore, wireless reflectometry measurements are conducted to characterize the sheet resistance for the investigated electro-textiles. We then use the sheet resistance in modeling the conductive fabric ground planes in a full-wave electromagnetic solver. Our results contribute to deeper understanding of the complex electro-textiles structures and guidelines for future practical wearable antenna designs.

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Fabrication of embroidered UHF RFID tags

Cited by 22 publications

References 3 publications

Embroidery and Related Manufacturing Techniques for Wearable Antennas: Challenges and Opportunities

Embroidery and Related Manufacturing Techniques for Wearable Antennas: Challenges and Opportunities

Flexible and Conformable Antennas for Body-Centric Radiofrequency Identification

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

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