Planar metasurface retroreflector with wide bandwidth and high efficiency

摘要

The present invention relates to a wide bandwidth and high efficiency planar metasurface retroreflector. According to the present invention, a plurality of first unit cells are arranged in a grid on the upper surface of the substrate and continuously arranged at a set interval in the x-axis direction so as to retro-reflect radio waves incident in the x-axis direction with respect to the xy plane of the substrate. A plurality of first supercells consisting of, and a plurality of second unit cells arranged in a grid on the lower surface of the substrate and continuously arranged at set intervals in the y-axis direction so as to retroreflect radio waves incident in the y-axis direction It provides a planar meta-surface retro-reflector including a plurality of second supercells composed of, and a base substrate disposed under the second supercell and including a ground plate on a lower surface thereof. According to the present invention, by placing metastructures in which the strip shape is repeated on both sides of the substrate, it is possible to generate retroreflection in two directions, and by optimizing the distance between the ground plate and the substrate, the operating bandwidth and efficiency of the retroreflective meta surface can be improved. It provides an advantage that can be improved.