A multi‐mode pattern reconfigurable antenna with wide beam coverage and its application to dual‐polarized wide‐angle scanning phased array

Abstract

In this paper, radiation patterns of a single-layer microstrip antenna, which can be switched to operate under dual TM 11 modes of a circular patch and a TM 21 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 Â 5 planar array, which can scan its main beam from À60 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.

A review of microwave electronically scanned array: Concepts and applications

“…Therefore, phased array as the main component, have many other characteristics, besides wide scanning angle, wide bandwidth and multi-band, such as sidelobe suppression, 146,147 elimination of scan blindness, 148,149 and multi-polarization. 150,151 In addition, phased array antennas have also been widely used in many commercial fields. Increasing number of internet access devices makes low frequency band crowded and overwhelmed.…”

“…Requirements of modern phased array radar system include multi‐function (target search, recognition and tracking at the same time), high resolution, high data rate and working in harsh electromagnetic environment. Therefore, phased array as the main component, have many other characteristics, besides wide scanning angle, wide bandwidth and multi‐band, such as sidelobe suppression, 146,147 elimination of scan blindness, 148,149 and multi‐polarization 150,151 …”