Design of RFID Antenna for 2.45GHz Applications

In this paper, we propose a new design of compact planar antenna with a pi-shaped shorted structure. The antenna which operates at 2.45 GHz is designed and fabricated respectively. The influences of geometric parameters of this kind of planar antennas on the resonant frequency, bandwidth and gain are also discussed. We use IE3D software to design planar antennas and choose the better parameters to manufacture planar antenna. The novel design proposed antenna here with the size of 27 mm × 10 mm has resonant frequency of 2.45 GHz, bandwidth of 135 MHz, return loss of -39.68 dB and gain of 0.766 dBi. The fabricated antenna is suitable for radio frequency identification (RFID) applications at 2.45 GHz.