New Approaches For Augmented UHF RFID Textile Yarn

International audienc

Theoretical BER Evaluation of Passive RFID Tag-To-Tag Communications

International audienceThe concept of UHF RFID passive tag-to-tag communication has been introduced and opens new promising perspectives in the field of Internet-of-Things. This concept enables two powerless tags to exchange information using an external source. Moreover, a simulation framework has been proposed as a tool allowing the performance evaluation of tag-to-tag radio links in terms of Bit Error Rate (BER). The aim of this paper is to provide a theoretical framework for BER estimation. The theoretical framework takes into account various parameters such as modulation rate, receivers topology and the electromagnetic coupling of the tags. Furthermore, in order to validate the obtained results, they are compared with the ones obtained by realistic simulations

New Approaches For Augmented UHF RFID Textile Yarn

International audienc

Designing UHF RFID tag antennas with Barcode shape for dual-technology identification

In this paper, a novel methodology to design Ultra High Frequency Radio-Frequency IDentification (UHF RFID) tag antennas with Barcode layout is proposed with the challenging goal of "fusing" both technologies in a single device. Specifically, after a brief recall of the well-known barcode standard, a procedure to design meandered barcode-shaped UHF RFID tags is introduced and discussed leveraging on electromagnetic evidence. The main steps of the proposed method are described by highlighting the constraints inherited by both the adopted technologies, as well as the useful opportunities to automatise the entire antenna design process after a preliminary simulation campaign through a full-wave simulator. Different RFID-Barcode tag antennas are designed, manufactured, and characterised in terms of maximum reading range and tag sensitivity. Obtained results demonstrate the validity of the proposed approach

UHF RFID Elastic Textile Yarn

International audienceOver the last decade, the wearable electronics has greatly improved and the wearables market is expected to increase exponentially in the next years. UHF (Ultra High Frequencies) RFID (Radio Frequency IDentification) textile yarns represent one of the most relevant solutions for adding smart functionality into clothes and more generally for any object integrating a textile tag. Among the existing textile yarn solutions, the E-Thread® technology consists on electronics embedded into textile yarn using a micro-encapsulation method. This technology is the starting point of the work presented in this paper. One of the hardest constraints that the RFID yarn should overcome is the robustness against stretching. Thus, the antenna has to be tolerant to the deformation of the associated textile yarn. Unlike the half-wave dipole antenna used in the current E-Thread® yarn, the proposed solution is based on helical dipole antenna topology because its geometry naturally makes feasible an axial stretching. This study details the manufacturing process as well as the design methodology of the antenna taking into account the RFID context as well as the constraints imposed by the manufacturing process. The impact of the antenna's physical parameters is highlighted in order to provide design guidelines. The helical dipole antenna enables until 16% of axial elongation while the dipole antenna would tear apart

Theoretical BER Evaluation of Passive RFID Tag-To-Tag Communications

International audience— The concept of UHF RFID passive tag-totag communication has been introduced and opens newpromising perspectives in the field of Internet-of-Things. Thisconcept enables two powerless tags to exchange informationusing an external source. Moreover, a simulation frameworkhas been proposed as a tool allowing the performanceevaluation of tag-to-tag radio links in terms of Bit ErrorRate (BER). The aim of this paper is to provide a theoreticalframework for BER estimation. The theoretical frameworktakes into account various parameters such as modulationrate, receivers topology and the electromagnetic couplingof the tags. Furthermore, in order to validate the obtainedresults, they are compared with the ones obtained by realisticsimulations

Conception d'une antenne hélice pour fil textile RFID UHF extensible

National audienceDans cet article, la conception d’une antenne hélice pour la réalisation d’un fil textile intelligent intégrant la technologie RFID (Radio Frequency IDEntification) UHF (Ultra Hautes Fréquences) est présentée. L’intérêt du design proposé est à la fois de permettre l’intégration de l’élément rayonnant RFID UHF dans le fil textile mais aussi d’assurer une certaine robustesse à l’élongation du fil. Le contexte industriel de l’étude est souligné, puis la méthodologie de conception et les résultats démontrant l’efficacité de la solution proposée sont détaillés. L’antenne réalisée présente une longueur de 24 mm par brin, un diamètre de 1 mm et une distance entre deux spires adjacentes de 0,3 mm. Elle supporte une élongation jusqu’à 16 % de sa longueur sans dégradation notable de ses paramètres électriques