Electromagnetic-wave absorption-material having periodic structure, and preparation method thereof

Abstract

The present invention discloses an electromagnetic-wave absorption-material having a periodic structure. The material comprises magnetic-wave absorption-blocks and a dielectric material grid, wherein meshes on the dielectric material grid are through holes, and the magnetic-wave absorption-blocks are embedded in the through holes of the dielectric material grid according to a certain periodicity. The preparation method for the electromagnetic-wave absorption-material comprises the following steps: selecting a magnetic-wave absorption-raw material, and cutting the magnetic-wave absorption-raw material into a desired shape and a desired size to prepare into magnetic-wave absorption-blocks; selecting a dielectric material with a dielectric constant in a preset requirement range, arranging insert holes on the dielectric material in a periodic arrangement manner to obtain a dielectric material grid; and individually embedding the magnetic-wave absorption-blocks into the insert holes arranged on the dielectric material grid, and adopting an adhesive to connect the magnetic-wave absorption-blocks and the dielectric material grid into the integration to obtain the electromagnetic-wave absorption-material having the periodic structure. According to the present invention, the work bandwidth of the wave absorption material can be effectively expanded without increase of the thickness, and the volume density of the magnetic-wave absorption-material can be substantially reduced.

Description

technical field [0001] The invention belongs to the field of electromagnetic wave-absorbing materials, and in particular relates to an electromagnetic wave-absorbing material with a periodic structure and a preparation method thereof. Background technique [0002] The development and application technology of electromagnetic absorbing materials originated during the Second World War and has been widely used so far. Today, with the development of electronic science and technology, the application range of electromagnetic absorbing materials has gone far beyond the military field, and its application in civilian applications such as information dissemination, electromagnetic compatibility, and microwave radiation protection has become increasingly widespread. Among the many kinds of electromagnetic wave absorbing materials, magnetic wave absorbing materials are currently the most widely used one due to their excellent wave absorbing properties. However, the current magnetic a...

AI Technical Summary

Problems solved by technology

However, the current magnetic absorbing materials are all using the traditional Dallenbach structure or multi-layer structure, which has a large volume density and a very limited absorbing bandwidth, which is difficult to meet the application requirements.

Therefore, it will be of great significance to design a new type of absorbing material that can effectively solve the problems of narrow absorption bandwidth and high density of existing magnetic absorbing materials.

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