Metamaterial Inspried Long Read Range UHF RFID Tag Antenna

Abstract

This paper proposed a novel metamaterial inspired long read range UHF RFID tag antenna. A square split ring resonator is acting as a radiator, which operates under electric resonance mode rather than common magnetic resonance one. T-matching network was used to provide a good conjugate matching between UHF RFID chip and the radiator. The maximum read range is over 12 m (EIRP = 4 W). Simulated and measured results are compared and discussed.