UHF RFID tag for metal containers

In this paper, we describe a passive UHF RFID tag for operating on various metal surfaces, primarily metal containers. The tag is designed is designed to cover both ETSI (865-870 MHz) and US (902-928 MHz) RFID bands and to provide both normal (boresight) and edge (lateral) reading capability with the read range of up to 7 m from normal direction and up to 4 m from lateral directions when mounted on metal. We describe the antenna structure, present modeling, simulation, and experimental data, and provide information on typical applications of this tag.