Multilayer structure plasma meta-material tunable ultrawide-band wave absorber

Abstract

The invention discloses a multilayer structure plasma meta-material tunable ultrawide-band wave absorber of which the structure comprises a bottom metal reflecting plate, a dielectric substrate whichis arranged on the metal plate, solid state plasma resonant units which are arranged on the dielectric substrate, "Y"-shaped solid state plasma resonant units which are arranged in the dielectric substrate and solid state plasma columns which connect all the resonant units. The wave absorber has great absorbing effect for the TE polarized waves and controls the excitation area of the resonant units formed by the solid state plasma to realize excitation of different resonant units through programming so as to achieve the objective of dynamic regulation and control of different frequency of thewave absorber and realize ultrawide-band absorbing of the wave absorber; besides, the working frequency of the wave absorber can cover the whole Ku band under the condition of appropriate selection ofthe excitation area, and absorbing of low frequency electromagnetic waves can also be realized under the condition of small physical size.

Description

technical field [0001] The invention relates to a plasma metamaterial tunable ultra-broadband wave absorber with a multilayer structure, belonging to the fields of radio communication and microwave devices. Background technique [0002] Plasmonic metamaterials are metamaterials that exploit surface plasmons generated due to the interaction of light and metal-dielectric materials. Under special conditions, incident light and surface plasmons couple to generate self-sustaining and propagating electromagnetic waves called surface plasmon polaritons. Once such a wave is formed, it propagates along the metal-dielectric interface. Compared with the incident light, the wavelength of the plasmonic polarized wave is much shorter, and the plasmonic metamaterial is composed of composite materials, which are designed with metals and dielectrics to achieve properties that are not found in nature. This property arises from the single structure of the composite, which is characterized by...

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Problems solved by technology

The specific absorption frequency of general multi-frequency absorber is scattered and discontinuous, and cannot achieve continuous absorption in a certain frequency band.

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