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

Abstract

In the paper, a bent cross‐shaped dielectric resonator antenna element with wide half‐power beamwidth of 224.9° is proposed and applied for designing a 1 × 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° to +70° GHz with a gain drop of less than 1.75 dB and a sidelobe level of less than −5.08 dB.

Eliminating sensing blind spots of field-enhanced Rydberg atomic antenna via an asymmetric parallel-plate resonator

“…Atomic antennas with isotropic response [5] are needed in many situations, such as wide-beam scanning [17], aerospace communications [18], and precision measurement calibration of electromagnetic fields [19]. Nevertheless, field-enhanced atomic antennas [12,13,14,15,16] will cause reception blind spots at particular angles.…”