Study and Design a Novel Adaptive Array Antenna for a RFID Applications

In this paper, a novel structure of antenna array which compose of H-shaped patch antennas with slot and parasitic elements has been presented and discussed. The proposed antenna is suitable for RFID (Radio Frequency Identification) applications. It is dedicated to operate in the frequency band centered on the resonance frequency f0 = 2.45GHz. It is fed by a parallel linear array adapted to 50Ω. High Frequency Structural Simulator (HFSS) software is used to optimize geometric parameters and simulate the radiation characteristics of the proposed antenna array. The simulation results show that the reflection coefficient reaches a level of at least -31dB at the operating frequency of the antenna, a narrow bandwidth of the order of 26MHz, and a gain of 6.6dB.