A metasurface and wave absorber based on multi-unit periodic array distribution

By designing a metasurface with a multi-unit periodic array distribution, combined with specific microstructures and dielectric layers, the narrow bandwidth problem of existing metamaterial absorbers is solved, achieving a wideband absorption effect, which is suitable for electromagnetic shielding and microwave imaging.

CN119581863BActive Publication Date: 2025-11-25NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
2 Cites 0 Cited by

Patent Information

Application Number
CN202410778764.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-06-17
Publication Date
2025-11-25
Estimated Expiration
2044-06-17

AI Technical Summary

Technical Problem

Existing metamaterial absorbers are mostly single-band narrow-band absorbers, which makes it difficult to achieve broadband absorption and limits their application in many fields.

Method used

A metasurface based on a multi-unit periodic array distribution is designed. By combining microstructure units with specific structures, including star-shaped, square-shaped, and snowflake-shaped structures, a 4*4 matrix array is formed. Combined with a conductive reflective layer and a dielectric layer, it constitutes an absorber.

Benefits of technology

It achieves an electromagnetic wave absorption rate of over 90% in the 8.31-41.75 GHz frequency band, and features flexibility and ease of integration, making it suitable for fields such as electromagnetic shielding and microwave imaging.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application discloses a super-structure surface based on a multi-unit periodic array distribution, the super-structure surface is mainly formed by a plurality of micro-structure units arranged periodically, each micro-structure unit comprises a sub-unit A1, a sub-unit B1, a sub-unit A2 and a sub-unit B2, wherein the sub-unit A1 and the sub-unit A2 are in a central symmetric structure, and the sub-unit B1 and the sub-unit B2 are in a central symmetric structure; a wave absorber formed by the super-structure surface comprises a plurality of periodically arranged wave absorption units, each wave absorption unit comprises, from bottom to top, a conductive reflection layer, a medium interlayer, a micro-structure unit layer and a medium top layer; the wave absorber can realize more than 90% electromagnetic wave absorption rate on a frequency band of 8.31-41.75 GHz, and ensures no electromagnetic wave transmission, so that most of electromagnetic wave energy entering the wave absorber is lost under the action of medium loss and ohmic loss; meanwhile, the wave absorber has the characteristics of flexibility, easy preparation, good wave absorption effect and facilitation of integration, and is suitable for technical fields of electromagnetic shielding and microwave imaging.
Need to check novelty before this filing date? Find Prior Art