Compact ceramic resonators for RFID applications

Abstract

High-permittivity ceramic components, being traditional building blocks of dielectric resonant antennas, are proposed and demonstrated to serve as efficient elements in radio frequency identification (RFID). While common RFID- tags utilize conduction currents in metal wires, our concept relies on excitation of high-quality factor resonant modes, activating a non-resonant metal ring, functionalized with an RFID chip. Our cascaded scheme demonstrates several advantages over conventional approaches, including footprint miniaturization and reading range enhancement of tags. In particular, high permittivity ceramic (ϵ∼100) cylinder-based tags were shown to be detected from 25% larger distance in comparison to commercial tags.