Towards environmentally friendly RFID applications: Fabrication of antennas and interconnections

In this paper, we present environmentally friendly UHF RFID tag antennas that are manufactured by inkjet printing silver nanoparticle ink on a plain paper substrate after finding the most efficient manufacturing parameters and the optimal number of printed layers. The RFID ICs in this work are attached with environmental-friendly and cost-effective conductive adhesive, and the ready RFID tags are evaluated for their wireless performance. According to our measurements, these tags show good performance throughout the global UHF RFID band. The peak read rangeof the fabricated tags can reach about 4 meters, which is suitable for many practical applications.