Wave absorber with regular geometric plane surface distribution, adjustable absorption efficiency and adjustable bandwidth

Abstract

The invention discloses a wave absorber with regular geometric plane surface distribution, adjustable absorption efficiency and adjustable bandwidth in the field of wave absorbers. The wave absorber comprises a bottom conductive layer, an intermediate dielectric layer and a surface conductive periodic structure, wherein the intermediate dielectric layer is arranged above the bottom conductive layer, the surface conductive periodic structure is arranged above the intermediate dielectric layer, and the bottom conductive layer, the intermediate dielectric layer and the surface conductive periodic structure form a sandwich structure. According to the invention, the surface conductive structure layer is changed from a traditional plane shape to a geometric plane regular distribution shape, so that different wave absorbing characteristics can be realized by defining the geometric shape, the number and the distribution position of the plane surface on the basis of the original plane structure; and the new design freedom degree of regular geometric plane distribution of the surface layer periodic structure is a breakthrough compared with a traditional surface plane periodic structure layer, and a wave-absorbing structure which is more complex in design and more excellent in performance is designed.

Description

technical field [0001] The invention relates to the field of wave absorbers, in particular to a wave absorber with a regular geometric plane surface distribution and adjustable absorption efficiency and bandwidth. Background technique [0002] From military equipment to civil buildings and wireless communication facilities, microwave absorbers are widely used in various fields because they can effectively absorb microwave energy without secondary pollution. The Salisbury screen is a classic microwave absorber with a narrow bandwidth. Jaumann absorbers utilize a multilayer structure to achieve broadband absorption, but with increased thickness and weight. In recent years, electromagnetic wave absorbers with artificial structures have been extensively studied due to their excellent designability. [0003] The practical application requirements of the existing absorbers are very different, and the requirements of the absorbers are also very strict, and higher and higher requi...

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Problems solved by technology

[0003] The actual application requirements of the existing wave absorbers are very different, and the requirements of the absorber are also very strict, and the reflectivity, transmittance, wavelength range and filtering characteristics of the absorber performance are put forward higher and higher requirements. In addition, The updated absorber design requirements also require that it can change the absorbing characteristics within a certain range. It is common to change the absorbing frequency range and optimize the absorption efficiency, which puts forward more requirements on the structure and material requirements of the absorber. high challenge

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