Dual-Polarized Phase-Gradient Reflecting Metasurface for 5G mmWave Coverage Improvement

This paper proposes the design of a phase-gradient reflecting metasurface (MTS) to improve 5G mmWave coverage, following the principle of perfect anomalous reflection. The reflective responses of a simple structure with cross-shaped resonators have been investigated. The results from a full wave simulation show that the proposed MTS with a surface area of 23×23 cm² can anomalously reflect a linear dual-polarized plane wave at 25.8 GHz from an incident angle of 30° to a reflection angle of 54° with a more than 10 dB radiation power ratio between the main reflected beam and its sidelobe at a specular reflecting direction.