A Novel Adaptive Array Antenna for a RFID Applications

In this article we present a novel structure of antenna array which consists on a set of H-shaped patch antennas with slot and parasitic elements. 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.