Abstract
This paper presents the frequency and polarization reconfigurable square ring antenna. The proposed reconfigurable antenna consists of square ring microstrip patch having two horizontal gaps on vertical side. The antenna is fed by T-microstrip through the gap coupling. Two pin diodes are there on the horizontal gap for switching. On the ground plane open square ring-slot having a vertical gap is present. Depending on the switching of pin diode and gap position in square ring patch on upper layer, it has different resonant frequencies and polarizations. As a result, this antenna operates at 2.4 GHZ and 4.18 GHZ with Linear polarisation & 3.4 GHZ with Left Hand Circular Polarization (LHCP) & Right Hand Circular Polarization (RHCP). This reconfigurable antenna (RA) is analysed using Computer Aided Design Package (CADFEKO). Comparison report of proposed antenna's simulated results and measured results show a good agreement.
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