Single-Radar image system designed by active transmission metasurfaces

In recent years, the single-radar or the single-pixel image technology has greatly developed. Due to the excellent ability of controlling the electromagnetic wave by metamaterials/metasurfaces, the spatial filters (masks) which are the important parts of the single-radar image system can be easily realized by the metasurfaces. In our work, we present the active transmission metasurfaces to achieve the single-radar image under the microwave band with the high signal-to-noise ratio compared to the former works based on the theory of leaky-wave.