Reconfigurable Metasurface-Based Antenna for Beam Steering in Next-Generation Wireless Communication Systems

Abstract

A reconfigurable reflector element utilizing Metasurfaces (MS) with a lower feature and diminished weight is proposed for inside and outside 5G transmission techniques to surmount barriers, facilitating wireless quasi-line of sight communications at 38 GHz. Incorporating variations with MS unit cells (UC) facilitates tunability and adaptability. This methodology has been documented in numerous research studies, with frequency extending to the K-band. Currently, elevated frequencies are predominantly utilized, particularly in communications. This study introduces the layout of a reconfigurable MS reflector operating at Ka-bands, using an innovative resonant UC that provides uniform reflection across a broad range of incident angles, along with a straightforward DC bias stimulation for every UC, enabling two-dimensional (2D) ongoing manipulation of the reflecting stage. The UCs have a variable reflecting phase range exceeding 320° across a broad capacity. Results of one-dimensional (1D) and 2D systems at 38 GHz are shown. A steering rate of up to +48° was achieved for azimuths or elevations. A concurrent separate 2D beam steering (BS) capability of up to 15° in azimuths and +5° in elevations is demonstrated, enabling the circumvention of obstructions within a feasible angular geographic cone of 25° and 15°.