Wide-beam bent cross-shaped DRA antenna for wide-angle beam-scanning phased array

In the paper, a bent cross-shaped dielectric resonator antenna element with wide half-power beamwidth of 224.9 degrees is proposed and applied for designing a 1 x 8 wide-angle beam-scanning linear phased array. To obtain small gain drop and reduce the mutual coupling of the scanning array, the dielectric wall loaded rectangular truncated slots are inserted. For validation, a prototype operating at 5.8 GHz is designed. Measurement results indicate that the main beam of the designed phased array can scan from -70 degrees to +70 degrees GHz with a gain drop of less than 1.75 dB and a sidelobe level of less than -5.08 dB.