Metasurface Superstrate Beam Steering Antenna with AMC for 5G/WiMAX/WLAN Applications

• DOI: 10.1007/s11277-022-09993-4
• Publication Date: 2022-09-22T09:02:36Z
• Authors: Akhilesh Verma; Ravi Kumar Arya; Srinivasa Nallant...
• Keywords: WiMAX; Beam steering

Abstract A beam-steering antenna based on non-uniform metasurface superstrate and AMC, operating at 3.5 GHz, is presented. The antenna can steer the beam along θ = -18° and 18° with the superstrate and along θ = 0° in the absence of the superstrate with almost zero scan loss. Antenna structure consists of a top layer of non-uniform metasurface superstrate made of a 20 × 20 grid of electrically-small square-shaped metallic pixels while the bottom part consists of AMC with a grid of 5 × 5 pixels. The radiating element, CPW-fed monopole antenna, is placed between AMC and superstrate. The fabricated prototype shows desired beam steering in directions of θ = -18°, 0°, and 18° while maintaining uniform realized gain of 5.5 dB and matches well with simulations.