Effect of Bending on a Textile UHF-RFID Tag Antenna

In this paper, a textile UHF-RFID tag antenna at 915 MHz based on a T-match dipole loaded with circular patch on a felt fabric substrate is presented and discussed. In addition, the bending impact on the read range is analyzed by means of full 3D electromagnetic simulations. The bending analysis results indicate that the proposed textile tag can be used under both, concave and convex bending with a reduction of read range lower than 10 % in all cases. These results confirm that the proposed UHF-RFID tag is a useful design in application where the devices can be deformed, such as wearable applications.