Miniaturized metasurface unit based on patch stacking and metasurface antenna

The utility model belongs to the technical field of metasurfaces, and relates to a miniaturized metasurface unit based on patch stacking and a metasurface antenna. The miniaturized metasurface unit based on patch stacking comprises a first dielectric layer, a second dielectric layer, a third dielectric layer and a fourth dielectric layer which are sequentially stacked from top to bottom, the first dielectric layer comprises a first dielectric plate, two first radiation patches symmetrically arranged at the top of the first dielectric plate at intervals, and a first slot line; the second dielectric layer comprises a second dielectric plate, two second radiation patches symmetrically arranged at the top of the second dielectric plate at intervals, and a second slot line; the third dielectric layer comprises a third dielectric plate, two third radiation patches symmetrically arranged at the top of the third dielectric plate at intervals, and a third slot line; the fourth dielectric layer comprises a fourth diele