Broadband Textile-Based Passive UHF RFID Tag Antenna for Elastic Material

We present a broadband textile-based UHF RFID tag antenna. Its wide bandwidth makes the tag less susceptible to objects and materials in the vicinity. Also high conductive textile material (E-fiber) is used to introduce elasticity, flexibility, and mechanical strength. As a result, the designed tag antenna can operate in a wide range of dielectric materials and various environments. By contrast, conventional RFID tag antennas have narrow bandwidth and must be designed for placement in different materials. The new tag is designed for implementing with elastic materials; as an example, the designed tags are tested on automotive tires. Experimental results show that the designed tag achieves much better performance compared with commercially available tags.