International audienceIn this paper, we demonstrate for the first time that a 19-bit chipless tag based on a paper substrate can be realized using the flexography technique, which is an industrial high-speed printing process. The chipless tag is able to operate within the ultra-wide band (UWB) and has a reasonable size ( 7×3 cm ²) compared to state-of-the-art versions. Thus, it is possible to use this design for various identification applications that require a low unit cost of tags. Both the simulation and measurement results are shown, and performance comparisons are provided between several realization processes, such as classical chemical etching, flexography printing, and catalyst inkjet printing

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International audienceThis paper discusses recent advances in chipless RFID technology. It describes coding methods and storage capacity in RF domain, where the information is coded on the surface of the tags (conductive portion printed on the support constitutes the tag). It extends the concept of chipless RFID to THz domain where the information is coded into the volume of the tag, i.e. in the stack of different dielectric layers. Encoding of 16 bits is explained as an example. Several examples of RF and THz tags are reported and their design and performance are carried out and discussed. Many remarkable results are obtained. Tag fabrication on paper substrate using flexographic technique is also incorporated

In this paper, we present an innovative solution to achieve high efficiency printed antennas made on paper substrate. A corrugated cardboard is introduced for the first time for RF circuits. This substrate has been characterized with small perturbation method. It presents a dielectric constant of 1.41 and loss tangent of 0.042. S ubsequently, patch antennas were realized on corrugated cardboard and classical paper substrate. A measured gain of 5.12 dBi is reached with corrugated cardboard compared to -3.24 dBi for classical paper. S imulation results show a good agreement with measurement.

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