Metasurface based Circularly Polarized Reconfigurable Antenna

Objective: The polarization reconfigurable elliptical slot antenna using corner truncated square Metasurface (MS) is proposed. Methods/Statistical Analysis: The proposed antenna has an elliptical slot radiator with aperture coupled microstrip feed and Metasurface is placed just above the slot antenna. The antenna reconfigures to LP, RHCP and LHCP using Metasurface. The antenna performance is observed in its three polarization states. The Metasurface antenna is designed and numerical simulation is presented using HFSS. Findings: The investigation reveals that the antenna resonates at 3.5 GHz and it has an impedance bandwidth of 370 MHz. The linear and circular polarization is obtained when the Metasurface is rotated at different angles with relative to the slot antenna. Additionally, due to the Metasurface structure, the wide axial ratio bandwidth of about 350 MHz is obtained. The gain of about 7.5 dB is obtained for both LHCP and RHCP and that for LP is 6.8 dB. Applications: The Metasurface loaded antenna exhibit characteristics that can meet the requirements of WiMAX (3.5 GHz) applications.