Design of A Novel Reconfigurable Antenna with Independently Tunable Polarizations and Patterns

In this paper, a novel reconfigurable antenna with independent control of polarization (Pol) state and pattern deflection is proposed to improve communication quality and anti-interference ability. To achieve pattern deflection in the E-plane, the on-off states of diodes are utilized to provide a phase difference between the two inverted-L antennas on both sides. The tilting of patterns in the H-plane is implemented by the Yagi-like principle. The two deflection techniques are combined to achieve a tilting of patterns towards multiple azimuths for the four polarizations (x-Pol, y-Pol, and ±45^°-Pol) in the half-space domain of z>0. The designed reconfigurable antenna realized four polarizations with flexible beam steering at the band from 4.04 GHz to 4.36 GHz, which can be a reliable antenna element for phased arrays possessing switchable polarizations and wide-angle scanning capability.