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This paper presents a novel architecture of inkjet-printed passive UHF RFID based sensor tag for wireless gas (CO2) sensing. An RFID tag made with Silver (Ag) ink is loaded with carbon nanotube (CNT) ink for sensing purpose. A switch in its structure provides two modes of operation, sensor on (SON) mode and sensor off (SOFF) mode. In SON mode, the sensor tag modifies its backscatter properties in...
We analyze the performance of an inductive link between a cm-size loop antenna based on conventional circuit board fabrication and 6.5×6.5 mm2 planar loop antennas deposited on flexible platforms by inkjet printing gold nanoparticle ink and by electron-beam evaporation. The highly flexible antennas have been designed to provide wireless power and data telemetry for battery-free cortical implants in...
This paper studies the implementation of an RFID chipless sensor based on split ring resonators. It operates in the ISM band at 2.45GHz to detect a change of carbon dioxide, and a variation of temperature. The realization of this passive wireless sensor involves inkjet printing using several ink types so that a device that works can be realized from scratch in a few stages. The substrates used are...
Material choices in electronic devices have a huge impact on the environment. The use of environmental-friendly processes and renewable materials is a growing trend. We present the inkjet-printing of antennas for passive UHF RFID tags on wood, paper, and cardboard. We printed the prototype antennas without surface treatments. We evaluated the performance of the fully assembled tags through wireless...
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