Novel design of RFID UHF passive tag for wideband applications by direct and contactless chip connection

International audienceIn this paper, we present two different designs for Ultra High Frequency (UHF) Radio Frequency Identification (RFID) passive tags. The first proposed design has been mounted on AK3 Tagsys® loop, which is a small loop antenna already connected to the chip while the second approach is connected directly with RFID chip. The optimized designs have compact size and bandwidth for worldwide UHF RFID applications (860MHz to 960 MHz). The advantages and disadvantages of each approach will be also discussed. From the experimental results, these designs have the acceptable read-range for ETSI regulations of RFID (9.6m and 5.97m) and can be applied for real-world applications. However, the calibration between the simulation and the characterization in order to remove the tolerance of fabrication process should be executed in future steps to obtain the best performance by improving the proposed designs

Développement des capteurs sans fil basés sur les tags RFID uhf passifs pour la détection de la qualité des aliments

Le but de cette thèse est de développer des capteurs sur la base des tags RFID, des technologies et matériaux disponibles au Vietnam afin de contribuer à résoudre la problématique du contrôle de la qualité des produits alimentaires. En effet la technologie RFID s est affirmée en importance pour ses applications dans de nombreux domaines. Dans ce contexte, l identification des produits alimentaires expirés, sans les endommager, est une orientation de recherche très prometteuse. Un tag RFID UHF passif peut aussi être composé de plusieurs puces et plusieurs antennes, chaque couple puce/antenne conçu pour travailler sur un intervalle déterminé de valeur de permittivité. Donc, à partir de l ensemble des permittivités définies pour chaque couple puce/antenne et les signaux réfléchis vers le lecteur, nous pourrons mesurer la permittivité de l objet tracé. Ainsi la connaissance de la permittivité des aliments et la conception spécifique de l antenne, nous développerons un tag capteur de type "multi puce/antenne" qui sera utilisé comme un capteur sans fil pour la détection de la qualité des alimentsIn recent years, RFID technology has established itself in importance, particularly for applications in the civil sector. In this context, identification of expired products without damage is a very promising direction of research. However, the price of these sensors is still too high especially compared to living in Vietnam. A passive UHF RFID tag chip can include many antennae and many chips on a same substrate in which each pair of chip/antenna is designed to be activated on a determined interval value of permittivity. So from designed permittivities for each pair of chip/antenna and the reflected signals to the reader, we can define the value of permittivity of the object that is labelled with RFID tag. From the characterization of food permittivity and the background of antenna design, we developped a sensor tag "multi chip/antenna" to be used as a wireless sensor for the detection of food quality. The aim of this thesis intends to develop a new family of wireless sensors based on RFID technology and available technology of fabrication in Vietnam to solve this problem.SAVOIE-SCD - Bib.électronique (730659901) / SudocGRENOBLE1/INP-Bib.électronique (384210012) / SudocGRENOBLE2/3-Bib.électronique (384219901) / SudocSudocFranceF