Double-frequency illusion metasurface

The invention relates to the technical field of electromagnetism, and discloses a double-frequency illusion metasurface which comprises n * n metasurface units arranged in a matrix mode, each metasurface unit comprises a first dielectric layer and a second dielectric layer which are sequentially connected from top to bottom, a first metal layer is attached to the upper surface of each first dielectric layer, and a second metal layer is attached to the upper surface of each second dielectric layer. A third metal layer is attached to the lower surface of the second dielectric layer, the first metal layer and the second metal layer comprise rectangular patches and split-ring resonators, the centers of the rectangular patches and the circle centers of the split-ring resonators are the centers of the metasurface units, and the rectangular patches do not intersect with the split-ring resonators; according to the double-frequency illusion metasurface provided by the invention, the limitation that a traditional illus