Compact ceramic on-metal RFID tag

Radio Frequency Identification (RFID) is a widely used method for contactless data reading over a wireless communication channel [1] . RFID tags are widely used in warehouse logistics, payment systems, as biometric identifiers, and in many other applications. Using today’s technology, RFID tags can be implemented almost anywhere, and their electromagnetic design can be adapted to each application. In this paper, we present a new type of ceramic RFID tag. The general concept of the RFID tag is shown in Fig. 1(a) . The tag consists of a dielectric cylindrical resonator with a non-resonant metal split ring located on the surface. A commercial tag’s chip is placed in the gap. Using the reader’s interrogation signal, a resonator’s magnetic dipole mode is excited ( Fig. 1(b) ). The excited resonator displacement currents are converted into conduction current in the ring, initiating microchip operation. Due to the minimal amount of metal components, the proposed ceramic tag can show good performance on conductive surfaces.