An absorbing and permeable integrated material with a broadband wave-transparent window

Abstract

The invention provides an absorption-penetration integrated material with a broadband wave-transmitting window, which belongs to the technical field of artificial metamaterials. The absorbing and permeable integrated material of the present invention is composed of an impedance layer and a frequency selective surface layer, wherein the impedance layer is composed of metal layers with special structures which are arranged in the center of both sides of the dielectric layer, wherein one metal layer is obtained by rotating the other layer by 90°, and the metal layer is obtained by rotating the other layer by 90°. The center of the layer is designed as an interdigitated structure; the frequency selection layer has three layers of metal to achieve the effect of a third-order filter. The combination of the two achieves a broadband wave-absorbing-wave-transmitting-wave-absorbing effect, and the wave-transmitting band of the integrated material has a high squareness, and the transition band between the wave-transmitting band and the wave-absorbing band is narrow; The frequency responses of the horizontally polarized wave and the vertically polarized wave are almost the same, with dual polarization characteristics.

Description

technical field [0001] The invention belongs to the technical field of artificial metamaterials, and in particular relates to an absorbing and penetrating integrated material with a broadband wave-transmitting window. Background technique [0002] In modern military, electromagnetic stealth technology is one of the important indicators for evaluating military equipment. The traditional means to realize electromagnetic stealth are as follows: 1. Adding absorbing materials to the shell of military equipment, so that the military equipment can absorb the electromagnetic waves emitted by enemy radars and reduce reflection; 2. Design special shields for military equipment based on electromagnetic scattering theory The shape reduces the radar cross section. However, neither of these approaches works well for antenna cloaking. Antenna is one of the important scattering sources of military equipment, but applying absorbing material on the surface of the antenna or changing the sha...

AI Technical Summary

Problems solved by technology

At present, there are wave-absorbing-transparent-absorbing artificial electromagnetic materials with broadband wave penetration, but most of them adopt three-dimensional structures, which are difficult to process and are single-polarized materials.

Images