Subwavelength and low‐profile element using metallic hole for reflected antenna array

Abstract

In this Letter, a novel subwavelength and low-profile element is proposed for the reflected antenna array applications. By using the metallic hole, the proposed element achieves a smaller dimension with the period of 0.1125 wavelength and the profile of 0.036 wavelength at the centre frequency of 13.5 GHz. The element obtains a wide reflected phase shifting range of 337.2°in such a small dimension. The reflected magnitude and phase are less sensitive to the incidence angle over a large range from +60°to −60°. To verify the function of the proposed element with a metallic hole, a reflected antenna array with 2724 elements is designed, fabricated, and measured. The array achieves a maximum peak gain of 23.30 dBi at 13.25 GHz with a high aperture efficiency of 61.05%.

A high‐integration dual‐resonance element with independent frequency tuning for wideband reflectarrays

“…To tackle this problem, the multi‐resonant technique has been extensively applied in recent research. However, there is a limitation in the size and spacing of elements, circumventing reflectarrays plagued by feed image lobe and phase error, which will deteriorate the overall performance [1]. Hence, the study of wideband elements with compact size is of paramount significance.…”

Development of Beam Steerable Reflectarray With Liquid Crystal for Both E-Plane and H-Plane

“…Reconfigurability, a generally highly desirable feature, would increase their versatility even more. The previous works on RAs are mainly focused on the unit design [2]- [5] and generating a fixed pattern optimized by algorithm [6]- [11]. Many of these works are about influence of unit parameters on phase change and fixed element distribution on the array [2]- [10].…”