Radio Frequency Identification Reader Antenna Design for Tracking Applications

Radio Frequency Identification (RFID) is the technology employed for automatically identifying and tracking animals, things or people using radio waves. Therefore, several antennas designed for RFID applications have been introduced in the previous literature works. But they possess some drawbacks. For example, some have less bandwidth percentage and some have less gain. Thus, this paper introduces a high gain RFID reader antenna. The proposed RFID antenna works in 846 - 930 MHz frequency band with 9.45 % bandwidth percentage and 9.09 dBi gain. Moreover, the proposed antenna has circular polarisation and has 2.07 dB axial ratio. The antenna presented features an aluminium ground measuring 296 mm x 296 mm x 1.6 mm and a stainless steel patch with dimensions of 146 mm x 141 mm x 0.8 mm. The proposed design has been simulated on Ansys High Frequency Structure Simulator (HFSS).