A Wide-Angle Beam-Scanning Circularly Polarized Dielectric Resonator Antenna Phased Array

In the paper, a wide-angle beam-scanning millimeter-wave (mm-wave) circularly polarized (CP) dielectric resonator antenna (DRA) phased array is proposed. The design employs a port self-decoupling method based on polarization orthogonality to achieve wide-angle impedance matching while leveraging the near-field coupling effect to broaden the active element pattern (AEP). As a result, the proposed phased array can achieve a wide-angle beam-scanning range without requiring additional structures. Simulated results indicate that the main beam of the proposed array can scan from −60° to +60° at 30 GHz, with a peak gain ranging from 12.0 to 15.0 dBic. Furthermore, the axial ratio (AR) of the beam is less than 3 dB across the entire beam-scanning range, showing good CP performance.