3 results about "Metamaterial absorber" patented technology

The application provides a light-weight broadband metamaterial wave-absorbing structure based on a C-shaped sandwich structure, which comprises a first composite layer, a second composite layer and a reflecting layer arranged in sequence along the electromagnetic wave propagation direction; the first composite layer comprises a sandwich structure composed of multiple wave-transparent layers and skin layers arranged alternately; the second composite layer comprises a resistance film layer and a wave-transparent dielectric layer arranged alternately; and the lowermost wave-transparent dielectric layer is provided with the reflecting layer on the lower surface. The C-shaped sandwich structure can greatly improve the wave-absorbing performance of the wave-absorbing sandwich structure in the high-frequency (Ku) band, and overcomes the shortcoming that when the skin is thicker than 0.5 mm, the wave-absorbing sandwich structure is difficult to obtain satisfactory wave-absorbing effect in the high-frequency (Ku) band.

The utility model relates to far infrared metamaterial absorber technical field, specifically disclose a multifunctional far infrared metamaterial absorber, including a plurality of periodic array arrangement's metamaterial unit, the metamaterial unit is for the laminated structure, from top to bottom includes successively: dirac half metal layer, graphene layer, dielectric layer, metal reflection layer, the dirac half metal layer is rudder -shaped, including center hollow cylinder's square structure, cylinder structure, four rectangle structure, the cylinder structure is located the outside of square structure, square structure, cylinder structure concentric arrangement, four rectangle structures evenly distribute in the outside of square structure, four rectangle structures respectively with square structure side vertical intersection. The far infrared metamaterial absorber of the application has tunable multi-peak absorption characteristic, and has wideband and narrowband dynamic switching ability.

This invention discloses a broadband metamaterial absorber based on a swastika shape, comprising multiple absorbing units, each including a reflective layer; a dielectric substrate disposed on the reflective layer; and an ITO thin film resonant layer disposed on the dielectric substrate. The resonant layer has a cross-shaped structure. First extensions extend from the four ends of the resonant layer, making it swastika-shaped. Second extensions extend perpendicularly from the four first extensions, and the first and second extensions connect to form a corner structure. The circuit resonance in this invention is stable. When the surface impedance matches the free-space impedance within a wide bandwidth, electromagnetic waves of different frequencies can effectively enter the absorber and be absorbed, achieving broadband absorption. The addition of a corner structure to the resonant layer not only increases the length of the current path, thereby increasing the equivalent inductance, but also increases the propagation path length of electromagnetic waves within the metamaterial, thus broadening the absorption bandwidth.