Passive RFID tags for Metallic Environments Using Phased Array Reader Antennas

In this study, we consider the operation of radio frequency identification (RFID) tag antennas in metallic environments. Phased array is built using 2 RFID reader antennas for electronic beam steering and improving overall read range of the RFID antenna tags. The performance of RFID tag antenna is known to degrade in metallic environments. RFID tag antenna with ground plane is designed to improve the performance in harsh metallic environments. In this study, we use double slit antennas with ground plane for tags radiating in challenging metallic environments to achieve a 30 feet read range.