A method of manufacturing invisible electromagnetic wave structure

Abstract

A manufacturing method for electromagnetic wave structure invisibility. Firstly, according to the shape of the stealth target, the unit layer grid division and the unit structure grid division are completed to obtain a three-dimensional space grid composed of several cube unit grids, and then in the three-dimensional space grid Plan the electromagnetic wave propagation path, calculate the electromagnetic wave incident angle of each unit layer, and then calculate the refractive index of each unit layer, then calculate the equivalent dielectric constant of the unit structure in each unit layer, and then calculate the geometric size of the unit structure, using the wood pile structure As the unit structure of each unit layer, then according to the column width of the wood pile structure in each unit layer, a three-dimensional model of the unit structure is established, and finally 3D printing and structural assembly are carried out. The invention improves the invisible effect and realizes the structure. Integrated manufacturing can be used in the manufacture of highly aerodynamic stealth structures.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave structure invisibility, in particular to a manufacturing method for electromagnetic wave structure invisibility. Background technique [0002] Structural stealth has become a research hotspot in the field of stealth technology in recent years. Structural stealth refers to the specific arrangement of materials according to the stealth function requirements to form a structure with electromagnetic wave stealth function, so as to achieve the purpose of stealth. The stealth effect depends on the structure rather than the material. itself, thus called structural invisibility. The existing structural invisibility is mainly the invisibility of the laminated plate structure and the invisibility of the honeycomb sandwich structure. [0003] Invisible manufacturing method of laminated board structure: Calculate the electromagnetic parameters and thickness of each layer of material according to...

AI Technical Summary

Problems solved by technology

[0005] The above two methods can produce a broadband stealth structure with certain mechanical properties, but there are still some common deficiencies

1. The above methods have two problems in terms of stealth performance: there is a certain degree of surface impedance mismatch between the outermost wave-transparent material and the external environment, and there are more reflected waves at the interface between the two, which affects the stealth effect ; When the electromagnetic wave is incident at a large angle, the electromagnetic wave absorption rate is low, the reflectivity is high, and the stealth effect is not good

2. The above methods are difficult to realize the integrated manufacturing of invisible structures

The process is cumbersome, the processing cycle is long, the cumulative error is large, and the integrated manufacturing of the structure cannot be realized.

3. The structural complexity that can be achieved by the above methods is low, and it is difficult to realize complex stealth structures with aerodynamic functions such as surface microstructures and complex air inlets, and cannot be used for the manufacture of highly aerodynamic stealth structures

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