Designing BT Antenna for RFID Systems

This paper is about designing and optimizing a new antenna employed for RFID applications at microwave frequencies. The structure is designed in a way that it resonates at 2.45GHz, which is one of the RFID frequencies. The new patch is derived from BT(Bow-Tie) antenna. It results in a reduction of the size by more than 70%, as compared to monopole patch, alongside with having an acceptable gain and directivity. Based on a model of triangular antenna, a correspondent resonant model is presented. Simulation results achieved using our method show that the antenna and its model have the same resonant frequency at 2.45GHz. However, there was a little difference in Bandwidth. Key Terms: Radio Frequency Identification RFID, Tag, Readable Range R, BT Antenna