A Design Method of Wide-angle Absorbing Structure Based on Additive Manufacturing

Abstract

A wide-angle wave-absorbing structure design method based on additive manufacturing. According to the shape and size of the stealth target, the structure is divided into multiple layers, a multi-layer unit cell structure is selected, and a multi-layer structure is formed by a periodic array of unit cell structures; and then Perform multi-layer oblique incidence impedance matching design for TE wave and TM wave, and design and plan the electromagnetic wave propagation path in the multi-layer structure, and calculate the equivalent electromagnetic parameters of the multi-layer; by controlling the type and proportion of the absorbent in the composite material, and Control the structural parameters of the unit cell, realize the design and control of the equivalent electromagnetic parameters, optimize, obtain the type and proportion of the multi-layer material and the structural parameters of the unit cell, carry out modeling, calculate the reflection loss through simulation or measure the reflection loss through 3D printing , and verify whether the design requirements are met; the invention realizes the function of absorbing electromagnetic waves with large and wide incident angles, and can actively design and regulate the absorption angle.

Description

technical field [0001] The invention relates to the technical field of electromagnetic functional materials and structures, in particular to a method for designing a wide-angle absorbing structure based on additive manufacturing. Background technique [0002] The radar absorbing structure can reduce the detection distance by absorbing and scattering the detection signal of the enemy radar, which is an important technical way to realize radar wave stealth. However, the performance of the existing absorbing structure will be distorted, degraded, or even become an electromagnetic wave reflecting structure as the incident angle of the electromagnetic wave increases. The absorbing structure faces two key problems that need to be solved urgently: 1. The absorption angle is narrow; 2. The absorption performance is distorted in a wide angle. [0003] The radar absorbing structure requires multi-layer oblique incidence impedance matching and electromagnetic wave propagation path des...

AI Technical Summary

Problems solved by technology

However, the performance of existing absorbing structures will be distorted, degraded, or even become electromagnetic wave reflecting structures as the incident angle of electromagnetic waves increases.

The absorbing structure faces two key problems that need to be solved urgently: 1. Narrow absorption angle; 2. Distortion of absorption performance within a wide angle

[0004] The traditional honeycomb absorbing structure impregnates the absorbing agent through the paper honeycomb board, which cannot meet the design requirements of wide oblique incidence in terms of material and structure, and the absorption ability of wide oblique incidence angle is weak

The development of 3D printing technology provides new ideas for the design of absorbing structures in terms of materials and structures, but the existing design methods are limited by the processing technology, the production cycle is long and the variability is small, and the technology of 3D printing has not been fully utilized. Advantages to realize the design and manufacture of absorbing structures with wide oblique incident angles

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