Electromagnetic design method for wideband camouflage screen wave absorber

Abstract

The invention discloses an electromagnetic design method of a wideband camouflage screen wave absorber. The method includes the following steps that 1, a model is built for the wave absorber, whereinthe absorber includes a hollow hexagonal-prism structure and a gradient honeycomb structure; 2, a cross section of a hollow hexagonal-prism structure is selected, and equivalent electromagnetic calculation of equivalent structural materials in a plane region is conducted; 3, based on the equivalent structural material method of the plane region, equivalent electromagnetic calculation of gradient-honeycomb-structure materials of the wave absorber is conducted; 4, by establishing equivalent electromagnetic parameters of different gradient-honeycomb-structure materials, the reflectivity of structural materials of the wave absorber is calculated, and the structure of the wave absorber is optimized. The wideband wave absorber can be applied to camouflage screens of square weapon cabins, cavities, wave-absorbing buildings and the like, achieves excellent electromagnetic wave absorption or shielding effects, meanwhile has the characteristics of being waterproof on surface, preventing oxidation and being light and the like, and has an application prospect.

Description

technical field [0001] The invention relates to an electromagnetic design method and manufacturing technology of a camouflaged barrier absorber, in particular to an electromagnetic design method of a broadband camouflaged barrier absorber. Background technique [0002] The camouflaged barrier-absorbing material can achieve the purpose of reducing the backscatter of radar waves as much as possible. Aiming at the characteristics of light weight, wide protection band and low cost for anti-radar camouflage net, the radar wave absorbing material with porous and sparse structure has been paid attention to. In porous materials, radar waves propagate between the pores and the absorbing matrix in the form of broken lines, which is longer than the straight-line propagation distance in homogeneous materials, which increases the loss of radar waves. Reflection, during which the radar wave is absorbed by the absorbing matrix of the hole wall. The camouflage net has undergone the use of...

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Problems solved by technology

The document "Yan Jiabin, Liu Ying, Hu Chuanxin, etc., Development of multi-band grass-type camouflage net, surface technology, 2008" proposed a three-dimensional grass-type camouflage net absorbing mechanism, on the basis of radar absorbing coating design, The role of the three-dimensional grass structure on the radar absorbing effect is proposed. The three-dimensional grass structure is in the 2-18GHz band, the qualified bandwidth is 16GHz, and the maximum attenuation value can reach 30dB. The material has a complex structure, and the design theory has not yet been deepened. Research

The paper "Liu Haitao, Cheng Haifeng, etc., Preparation and performance research of pseudo-decorative base fabric with anti-radar performance, Weapon Materials Science and Engineering, 2006" proposed the preparation process of pseudo-decorative base fabric. The material is a simple Uniform structure, the design theory stays on a single-layer structure, and there is no in-depth study of complex structures

[0004] To sum up, camouflaged barrier absorbers usually have a porous structure in structure, and the structure is complex. At present, there are not many designs for porous materials. How to use porous structures and propose efficient electromagnetic design methods has always been a problem that needs to be studied.

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