Dual-polarized antenna design integrated with metasurface and partially reflective surface for 5G communication

Abstract

A design of electrical down-tilt dual-polarized base station antenna array (BSAA) for 5G communication applications is presented in this paper, which is realized by integrating with reconfigurable reflective metasurface and partially reflective surface (PRS). By controlling the varactor diodes which are inserted into the reflective elements, we can adjust the mainlobe direction of BSAA. Moreover, the PRS over the array is utilized to construct Fabry-Perot (FP) cavity with reflective metasurface and ground plane. Based on this design approach, a 1 × 6 dual-polarized BSAA operating from 3.4 GHz to 3.6 GHz is designed and fabricated. Simulated and measured results show that the gain is enhanced about 2.56 dB by PRS while side lobe level (SLL) is less than −20 dB. The mainlobe of the antenna array can be adjusted accurately within ±5° for beam down-tilt. The cross polarization discrimination (XPD) is less than −40 dB.

A Dipole with Reflector-Backed Active Metasurface for Linear-to-Circular Polarization Reconfigurability

“…At microwave frequencies, these metasurfaces can be made reconfigurable through the addition of switchable elements. The metasurface can be used to add the element of reconfigurability within an antenna system [15,[18][19][20][21][22]. Micro-electromechanical system (MEMS) devices can also be used to reconfigure metasurfaces.…”