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The challenge in designing chipless RFID sensors is to obtain a reliable and replicable estimation of environmental parameters. The aim of this work is to investigate two promising chipless RFID sensor configurations able to face these challenges.
This paper considers the integration of three attractive concepts: Electromagnetic Energy Harvesting (EEH), Radio Frequency Identification (RFID) communication, and exploiting the non-linear characteristic of RF devices. An EEH circuit is integrated with a passive RFID tag profiting from three nonlinear phenomena of rectifying elements: (1) the impedance power dependency, (2) the harmonic production,...
This paper presents a chipless RFID tag having both identification and sensing capability. It is based on 5 resonant scatterers that behave as signal processing antennas in the band from 2.5 to 7.5 GHz. Only one scatterer is used to monitor a physical parameter variation, while the four others allow identifying the remote sensor with 13 bits. To make a resonator sensitive to the temperature or humidity,...
This paper is dedicated to a discussion on the concept of the antenna and its evolution since its introduction as a specific device at the end of 19th century. For many decades, antennas were mainly used as transmitting and/or receiving devices. However many additional characteristics of the antenna can be considered in wireless applications. Energy harvesting, environment sensing, backscattering...
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