▎ 摘　　要

NOVELTY - The absorber has a first folded metal strip whose one end is connected to the midpoint of the bottom side of a triangular metal patch. The centers of the first circular metal patch and the second circular metal patch are both located on the extension line of the symmetry axis of the triangular metal patch. The bottom of a first dielectric layer (20) is provided with four third metal patch units. The four third metal patch units are respectively arranged in parallel corresponding to the four sides of the bottom surface of the first dielectric layer. Each of the third metal patch units is connected to the corresponding second metal patch unit through a metalized through hole penetrating the first dielectric layer. A bottom resonant layer (50) is provided with a hollow square structure. The middle of the four sides of the square is recessed toward the center of the square to form a U-shaped recessed groove. USE - Ultra-miniaturized 2.5-dimensional transparent integrated frequency selective wave absorber for use in antenna cover applied to weapon, radar antenna on aircraft and electromagnetic device. ADVANTAGE - The ultra-miniaturized 2.5-dimensional absorbing integrated frequency selective wave absorbing device uses graphene film to replace lumped resistor, it is convenient for planar integration and mass production, using the design of the folding metal strip and the through hole combination. The structure of the device is miniaturized, inhibiting the occurrence of the gate flap, reducing the double-station RCS under oblique incidence, and improving the Oblique incidence invisible performance. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the ultra-miniaturized 2.5-dimensional integrated frequency selective wave absorber with permeation absorption. Metamaterial unit (1) Top layer resonance layer (10) Dielectric layers (20,30,40) Bottom resonance layer (50)