A Ground Slotted UHF Tag Antenna For Blood Bags Monitoring

Abstract

A slotted tag antenna is presented for blood bag monitoring with good reading distance. In addition to the main radiating patch, cuts made into the ground to increase the antenna radiation efficiency and help to self-match the antenna impedance with the RFID microchip NXP G2XM IC chip in TSSOP8 (SOT505-1). The antenna structure is uniplanar and optimized to be mounted on a high-permittivity (Blood Bags) and to work in the UHF European band (865–868) MHz. Furthermore, an equivalent circuit model is presented and the characteristic of the proposed RFID tag antenna predicted by this circuit model are in good agreement with the full wave simulations. The obtained simulated show a read range of 1.28 meters when mounted directly on the Blood Bag.