A multi‐mode pattern reconfigurable antenna with wide beam coverage and its application to dual‐polarized wide‐angle scanning phased array. Issue 9 (22nd May 2021) - Peng, Fan
Abstract: In this paper, radiation patterns of a single‐layer microstrip antenna, which can be switched to operate under dual TM11 modes of a circular patch and a TM21 mode of a concentric annular shorted ring patch, is investigated and presented. Broadside and monopole‐like patterns under multi modes are combined to broaden the antenna main‐beam coverage. Besides, based on the current distributions of these modes, several slots are etched to realize antenna miniaturization. The miniaturized pattern reconfigurable antenna with a joint wide beam is applied to a dual‐polarized 5 × 5 planar array, which can scan its main beam from −60° to 60° in both orthogonal planes with a gain fluctuation less than 3 dB. In addition, the array is synthesized with the convex optimization approach to obtain low sidelobe level in its wide‐angle scanning range, validated by a full‐wave simulation study followed by the experimental verification.