Single-layered composite element wideband periodic wave-absorbing structure

Abstract

The invention discloses a single-layered composite element wideband periodic wave-absorbing structure, and belongs to the technical field of electronic materials. According to the invention, a dielectric layer printed with periodic array resistance patterns is arranged on a metal flat plate, the dielectric layer comprises a foam layer and periodic square ring-shaped resistive films arranged on the foam layer, and the periodic square ring-shaped resistive films consist of two kinds of resistive films of different sheet resistances.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, in particular to an electromagnetic wave absorbing structure. Background technique [0002] During World War II, the widespread use of radar as an advanced long-distance detection tool gave birth to the emergence of radar stealth technology. In modern warfare, the electromagnetic environment is becoming more and more complex, and radar absorbing materials, as an effective means to improve the stealth penetration capability of weapons and equipment, have also received more and more attention from various military powers. In addition, with the widespread use of technical products such as mobile phones and microwave ovens that use electromagnetic waves as a medium in various fields of real life, the accompanying electromagnetic pollution such as electromagnetic radiation also poses a threat to human survival and health. Therefore, radar absorbing materials are also widely used in civil...

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Problems solved by technology

However, these absorbers have a common disadvantage: although the effect of resonance superimposed broadband absorption can be achieved by increasing the thickness and the resonance frequency point, the working bandwidth is limited by the thickness, and the result of broadband absorption is that the thickness is very large ,take up space

However, these absorbers have a common disadvantage: although the effect of resonance superimposed broadband absorption can be achieved by increasing the thickness and the resonance frequency point, the working bandwidth is limited by the thickness, and the result of broadband absorption is that the thickness is very large ,take up space

However, these patterns are limited by their own characteristics. There is only one absorption peak in the low frequency band (thickness less than a quarter of the frequency band), and it is difficult to achieve the absorption effect of the low frequency band.

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