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Antennas doped with Chemical Interactive Materials (CIM) have been recently proposed as wireless chemical sensors suitable to integration with the battery-less UHF Radiofrequency Identification (RFID) technology. The open critical issue of this class of devices is the specificity of the electromagnetic response to volatile compounds different than those they were proposed for. This contribution describes...
A planar double-patch folded structure is proposed to achieve a miniaturized, highly sensitive and tunable UHF RFID passive sensor tag. The geometry hosts a radiating slotline which can host Chemical Interactive Materials (CIM) able to detect the relative humidity level or the presence of different gases in air. The resulting antenna surface is half the size of a credit card, ensures good communication...
Passive UHF RFID tags, beside item labelling, are also able to exploit capability of sensing the physical state of the tagged object as well as of the surrounding environment. Here a family of polymer-doped tags are proposed and fully characterized for the detection of ambient humidity. A sensitive chemical species based on PEDOT:PSS is used to dope a properly shaped slot carved into a folded-like...
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