Miniaturized broadband tag antenna for multi-standard UHF RFID applications

This work proposes a new broadband ultra-high frequency tag antenna with a pair of interconnected Split Ring Resonators. By using a pair of interconnected Split Ring Resonators, a new resonant mode adjacent to the origin mode is excited and a broadband characteristic is achieved. The bandwidth (VSWR<;1.23) of the proposed antenna is 170 MHz from 810 to 980 MHz and it covers all the global UHF RFID frequency bands. The proposed structure not only successfully widens the tag operating bandwidth but also enjoys small size. The proposed antenna also has the advantages of simple structure, low cost, and easy to manufacture.