Metal mountable microstrip patch UHF RFID tag antenna

This paper relates the development of a simple metal mountable RFID tag designed for ETSI band. One important aspect given by this design is using a simplistic structure that can be adjusted for different type of IC chip impedances that exists on the market. The antenna is simulated and measured and the obtained results reveals that the tag can be compared with other prototypes, achieving good performance when is attached to a metallic surface. Using an 8dBi antenna gain for the reader and an output power of 30dBm, is obtained a maximum reading distance of 4.8m when is attached to a metallic surface and 3.1m in free space.