A novel low‐cost beam‐controlling antenna based on digital coding metasurface

摘要

In this paper, a novel beam‐controlling antenna based on a single‐layer digital coding metasurface (DCMS) is presented. A transmission‐type DCMS is placed in the near‐field of the source antenna to form a low‐profile structure with the height of 0.15λ0 in total. These DCMS elements have two kinds of particles with different transmissivity responses to y‐polarized wave, corresponding to two basic digital element 0 and 1 respectively. By designing the coding sequences on DCMS carefully, the radiating mode can be dynamically and real‐time controlled. The proposed antenna has multi‐function that can realize wide‐angle beam‐scanning and wide‐to‐narrow beam switching simultaneously. The scanning angle ranges from −85° to +85° in H‐plane with the gain fluctuation less than 2dBi. The simulation results are verified by experiments. This type of antenna can be applied in a variety of wireless communication systems with the outstanding advantages of low‐profile, low‐cost, and multi‐function.