Wave-transmitting material with broadband resin matrix interlayer structure and preparation method of wave-transmitting material

Abstract

The invention discloses a wave-transmitting material with a broadband resin matrix interlayer structure and a preparation method of the wave-transmitting material. The wave-transmitting material comprises an outer skin layer, a first foam sandwich layer, a middle skin layer, a second foam sandwich layer and an inner skin layer which are sequentially overlapped and tightly combined, wherein the outer skin layer, the middle skin layer and the inner skin layer are made of continuous quartz fibre reinforced resin-base composite materials; the first foam sandwich layer and the second foam sandwich layer are made of polyurethane foams, the outer skin layer, the middle skin layer and the inner skin layer have dielectric constants of 3.1-3.2 and loss angle tangent values of 0.009-0.01; and the first foam sandwich layer and the second foam sandwich layer have dielectric constants of 1.10-1.15 and loss angle tangent values of 0.005-0.006. The preparation method comprises the steps of: preparing reinforced materials, and laying the reinforced materials according to the layering order and the thickness of each layer, pre-forming and curing to obtain the wave-transmitting material. The wave-transmitting material has the advantages of simple structure and high cost performance.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a broadband wave-transmitting material and a preparation method thereof. Background technique [0002] Wave-transparent materials refer to a class of materials with high transmittance to electromagnetic waves in a certain frequency band, which are widely used in the preparation of various radomes. Changes in temperature and frequency produce noticeable changes. [0003] For broadband wave-transparent materials, multi-layer structures are often used to meet the bandwidth requirements. Currently commonly used multilayer structure wave-transparent materials include A, B, and C-type interlayers. A-type interlayer is a three-layer symmetrical structure, which consists of two layers of relatively dense high-dielectric constant thin surface layer (fiber-reinforced resin-based composite material) and a low-dielectric constant, low-loss and low-density porous core layer. (such as por...

AI Technical Summary

Problems solved by technology

[0004] Among them, when the thickness of the foam sandwich is small, the A-type interlayer can achieve broadband wave transmission performance, but its mechanical properties are poor, and it is difficult to meet the requirements of use; when the thickness of the foam sandwich is large, there are more resonance peaks, and it is difficult to achieve broadband. Wave performance

The B-type interlayer has better mechanical properties, but it requires a lower dielectric constant of the outer layer material and a higher requirement for the robustness of the single layer thickness, which makes the process more difficult to realize

The C-type interlayer structure is composed of two A-type interlayers, which can further offset the residual reflection of the independent A-type interlayer, expand the frequency band, or increase the adaptability to a large incident angle range, but the transmittance of this structure is limited by the incident angle. sensitive to changes

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