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Absorbing material_multilayer structure absorption

Author:admin   AddTime:2021-05-31

For the broadband absorption problem of microwave absorbing materials, researchers from Ningbo Institute of Materials, Chinese Academy of Sciences designed and prepared a multi-layer structure that can absorb broadband electromagnetic waves through digital simulation technology. This multi-layer structure utilizes the high conductivity of carbon nanotubes and its The conductive grid formed in the composite film realizes the frequency separation of electromagnetic waves, and realizes the broadband absorption of electromagnetic waves through the sub-frequency absorption of electromagnetic waves.



The electromagnetic wave absorption principle of the absorbing material is: the absorption layer 1 is designed as a material that can absorb high-frequency electromagnetic waves, the absorption layer 3 is designed as a material that can absorb low-frequency electromagnetic waves, and the absorption layer 2 is designed to isolate high-frequency electromagnetic waves and low-frequency waves through simulation calculations. The electromagnetic wave function of the isolation layer, so as to achieve the sub-band absorption of electromagnetic waves. Therefore, the key to this structure lies in the design of the electromagnetic wave isolation layer.

This work is based on the high conductivity of carbon nanotubes and the special microstructure of the conductive network, which can realize electromagnetic wave frequency isolation of absorbing materials, so as to realize the simultaneous absorption of long-band and short-band electromagnetic waves. In the end, the absorption of nearly 13GHz bandwidth (covering the three mainstream frequency bands of C, X, and Ku) was achieved with a thickness of 2.4mm, and the electromagnetic wave energy absorption intensity reached more than 90%.

Absorbing Material:https://www.goodsmaterial.com/

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