Preparation method and metamaterial of a dielectric substrate

Abstract

The invention provides a preparation method of a dielectric substrate and a metamaterial. The metamaterial comprises the dielectric substrate and a plurality of artificial microstructures which are arranged on the dielectric substrate, the dielectric substrate is an organic resin substrate, and porous silica aerogel powder is uniformly distributed in the organic resin substrate. The preparation method of the dielectric substrate and the metamaterial have the following beneficial effects: the porous silica aerogel powder is added into a material of a metamaterial dielectric substrate, so that the dielectric constant of the metamaterial dielectric substrate reaches up to an extremely low range from 1 to 2, and the dielectric constant of the metamaterial dielectric substrate is further controlled by controlling the addition of the porous silica aerogel powder, so that a more accurate and flexible designing way is provided for the application of the metamaterial; and in addition, the metamaterial prepared by the preparation method of the metamaterial dielectric substrate provided by the invention has the advantages of lightness, non-toxicity, flame retardance and cheapness.

Description

【Technical field】 [0001] The invention relates to the field of metamaterials, in particular to the preparation technology of metamaterial dielectric substrate materials. 【Background technique】 [0002] Metamaterials refer to some artificial composite structures or composite materials with extraordinary physical properties that natural materials do not have. Through the orderly design of the structure on the key physical scale of the material, the limitation of some apparent natural laws can be broken through, so as to obtain the supernormal material function beyond the ordinary nature inherent in nature. The properties and functions of metamaterials mainly come from their internal structures rather than the materials that make them up, so a lot of research work has been done to design and synthesize metamaterials. In 2000, Smith et al. of the University of California pointed out that the composite structure of periodically arranged metal wires and split-ring resonators (SRR...

AI Technical Summary

Problems solved by technology

[0004] The existing artificial microstructures of metamaterials are generally metal materials, and the dielectric substrate generally adopts organic resin substrates. The dielectric constant of organic resin substrate materials is generally between 3 and 5. For some applications of metamaterials, often A material with a lower dielectric constant is required as a dielectric substrate, and it is difficult to find a suitable material while satisfying various mechanical properties

Even if there is a material with a lower dielectric constant and meets the mechanical performance requirements, its dielectric constant is determined by the nature of the material itself and cannot reach the predetermined value required by the metamaterial.

[0005] In addition, with the continuous expansion of the application field of metamaterials, the requirements for metamaterial dielectric substrates are getting higher and higher, such as insulation, light weight, non-toxic, flame retardant, cheap, etc., the existing dielectric substrate materials can not meet the requirements