Polarization reconfigurable Antenna with truncated corner and orthogonal trapezoidal slots for wireless communication

In this paper, a new technique for polarization reconfigurable antenna is proposed. The proposed antenna utilizes a combination of corner truncation and orthogonal trapezoidal shaped slots scheme to generate circular polarization (Antenna2). The antenna is fed by microstrip feed line and impedance matching is done by quarter wave transformer. The performance of proposed antenna is compared with simple corner truncated antenna (Antenna1). It is found that the proposed antenna show improvement in antenna parameter in terms of return loss and axial ratio. The Antenna2 has return loss better than 30dB whereas the Antenna1 has 20dB return loss for all the diodes state. The proposed antenna improves the 3dB axial ratio for RHCP (from 4.15dB to 2dB) and LHCP (from 2.83 dB to 1.85dB).