A novel design of miniaturized tag antenna loaded metamaterial spiral split ring resonator

Abstract

In this article, we propose a new design of a miniature antenna for integration into the RFID (Radio Frequency Identification) reader and the RFID transponder to operate in the Moroccan and European UHF (Ultra High Frequency) band. The proposed antenna is designed on a flexible PET (Polyethylene Terephthalate) substrate. The proposed tag consists of a microchip and a dipole antenna loaded metamaterial based on a spiral split ring resonator which has a negative magnetic permeability in the UHF RFID Moroccan and European band. The metamaterial unit cell is used to reduce the antenna size and a double T-matching structure is inserted to match the dipole antenna with the "Monza 1a" chip. The antenna yields an omnidirectional radiation patterns and a gain of 2.2 dBi at the central frequency. The designed antenna has a small size about 63 mm x 14 mm which is suitable for paper boxes and bottles labelling.