Impact of yarn on a textile UHF RFID TAG

An embroidered textile UHF RFID is proposed and characterized. The TAGs are based on a ‘T-match’ structure embroidered on a polyester textile substrate with three different conductive yarns. The input impedance and read range performance has been experimentally measured. The results show that the lower the electrical resistance of the yarn, the greater the TAG read range, achieving up to 7.5 meters.