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A novel ink-jet printed chipless RFID humidity sensor is presented. The sensor, based on a finite Artificial Impedance Surface (AIS), is ink-jet printed on a thin sheet of Mitsubishi paper, which is placed on a metal-backed cardboard layer. The frequency response of the AIS provides three deep nulls thanks to the three nested loops that constitute the unit cell of the periodic surface. The interaction...
A novel chipless RFID humidity sensor based on a finite artificial impedance surface (AIS) is presented. The unit cell of the AIS is composed of three concentric loops thus obtaining three deep and high-Q nulls in the electromagnetic response of the tag. The wireless sensor is fabricated using the low-cost inkjet printing technology on a thin sheet of commercial coated paper. The patterned surface...
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.
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