Frequency Reconfigurable Antenna Inspired by Tri-SRR Metamaterial

A frequency reconfigurable metamaterial-based microstrip antenna is presented in this paper. The proposed antenna consists of three split-ring resonators (SRR) and a tapered feeder placed on the top layer of a 30 × 25 × 1.6 mm
³
substrate. Nine PIN-Diode switches are distributed around the three rings, each ring contains 3 switches with 120-degree spacing. Reconfigurability is achieved by varying the condition of these switches. The suggested antenna is simulated using Ansys Electronics Desktop simulator (HFSS), and MATLAB software is used to analyze the characteristics of the metamaterial unit-cell. Single and dual bands are produced at 2.8, 3.025, (2.45 and 4.75) and (2.93 and 4.85) GHz. Radiation patterns, gain, input impedance and radiation efficiency are simulated to have a better observation of the performance of the antenna.