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Radar and infrared compatible stealthy material and preparation method thereof

A stealth material, radar technology, applied in chemical instruments and methods, lamination devices, lamination and other directions, can solve the problems of adverse effects of radar wave absorption performance, difficult to control dielectric properties, high infrared emissivity, and easy to scale Production and application, solve the effect of poor compatibility and mature preparation process

Active Publication Date: 2011-09-14
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, radar stealth materials require low reflectivity in the radar band, while infrared stealth materials require high infrared reflectivity. This contradiction brings great difficulties to the preparation of radar and infrared compatible stealth materials.
[0003] Currently researched radar and infrared compatible stealth materials are mainly divided into two types: single type and composite type. The former mainly includes conductive polymers, doped oxide semiconductors, and nanomaterials. However, there are the following deficiencies: 1) all are single-layer materials, the dielectric properties are difficult to control, and the radar absorption frequency band is narrow; 2) the infrared emissivity is generally high, and it is difficult to meet the infrared stealth requirements; 3 ) is mainly concentrated in theoretical research, and there are certain difficulties in the actual preparation
The radar and infrared compatible stealth composite material mainly refers to the preparation of an infrared stealth functional layer on the surface of the radar stealth material. There are low-emissivity coatings and metal thin films on the layer, but both of them will adversely affect the radar absorbing performance of the underlying radar absorbing material, and it is difficult to better achieve compatibility between radar and infrared stealth

Method used

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  • Radar and infrared compatible stealthy material and preparation method thereof
  • Radar and infrared compatible stealthy material and preparation method thereof
  • Radar and infrared compatible stealthy material and preparation method thereof

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Embodiment 1

[0024] a kind of like figure 1 The radar and infrared compatible stealth material of the present invention shown is mainly composed of a radar absorbing structure layer 1 and an infrared stealth function layer 2. The radar absorbing structure layer 1 is made of glass fiber-reinforced FRP composite material. to make. The middle part of the radar absorbing structure layer 1 is provided with a layer of resistive sheet 3, and the square resistance of the resistive sheet 3 is 120Ω / □, and the dielectric constant of the radar absorbing structural layer 1 thus formed is 4; The thickness is 5 mm, and the distance h between the resistor sheet 3 and the bottom layer of the radar absorbing structure layer 1 is 2.75 mm. The infrared stealth function layer 2 is a capacitive frequency selective surface. The corresponding unit period t of the capacitive frequency selective surface is 0.36 mm, the gap width d is 0.08 mm, and the infrared emissivity of the capacitive frequency selective surfa...

Embodiment 2

[0035] a kind of like figure 1 The radar and infrared compatible stealth material of the present invention shown is mainly composed of a radar absorbing structure layer 1 and an infrared stealth function layer 2. The radar absorbing structure layer 1 is made of glass fiber-reinforced FRP composite material. to make. The middle part of the radar absorbing structure layer 1 is provided with a layer of resistive sheet 3, the square resistance of the resistive sheet 3 is 130Ω / □, the dielectric constant of the radar absorbing structure layer 1 thus formed is 4.5; The thickness is 5.5 mm, and the distance h between the resistor sheet 3 and the bottom layer of the radar absorbing structure layer 1 is 3.3 mm. The infrared stealth function layer 2 is a capacitive frequency selective surface. The corresponding unit period t of the capacitive frequency selective surface is 0.8 mm, the gap width d is 0.08 mm, and the infrared emissivity of the capacitive frequency selective surface is 0...

Embodiment 3

[0041] a kind of like figure 1The radar and infrared compatible stealth material of the present invention shown is mainly composed of a radar absorbing structure layer 1 and an infrared stealth function layer 2. The radar absorbing structure layer 1 is made of glass fiber-reinforced FRP composite material. to make. The middle part of the radar absorbing structure layer 1 is provided with a layer of resistive sheet 3, the square resistance of the resistive sheet 3 is 125Ω / □, the dielectric constant of the radar absorbing structure layer 1 thus formed is 5; The thickness is 4.5 mm, and the distance h between the resistor sheet 3 and the bottom layer of the radar absorbing structure layer 1 is 2.25 mm. The infrared stealth function layer 2 is a capacitive frequency selective surface. The corresponding unit period t of the capacitive frequency selective surface is 0.8 mm, the gap width d is 0.12 mm, and the infrared emissivity of the capacitive frequency selective surface is 0.5...

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Abstract

The invention discloses a radar and infrared compatible stealthy material and a preparation method thereof. The compatible stealthy material is mainly formed by compounding a radar wave absorbing structural layer and an infrared stealthy functional layer, wherein the radar wave absorbing structural layer is made of a glass fiber reinforced glass steel composite material; and the infrared stealthy functional layer is a capacitive frequency selective surface. The preparation method comprises the following steps of: preparing the capacitive frequency selective surface by a printed circuit board (PCB) process; preparing a layer of resistance sheet on glass fiber plain cloth by using conductive carbon slurry through a screen printing process; preparing the glass fiber reinforced glass steel composite material by using epoxy resin as a base material and the glass fiber plain cloth as a reinforcing material through a resin forming process; and curing to make the capacitive frequency selective surface compounded and superposed so as to obtain the radar and infrared compatible stealthy material. The compatible stealthy material has a simple structure and low cost, is convenient to prepare, and has the duplex characteristics of high reflection of an infrared wave band and high permeation of a radar wave band.

Description

technical field [0001] The invention relates to a composite material based on glass fiber reinforced plastics and a preparation method thereof, in particular to a radar and infrared compatible stealth material and a preparation method thereof. Background technique [0002] With the rapid development of multi-spectral reconnaissance technology, the use of single-function stealth materials is limited. Multi-band compatible stealth materials, especially radar and infrared compatible stealth materials, have become the development direction of stealth materials research. However, radar stealth materials require low reflectivity in the radar band, while infrared stealth materials require high infrared reflectivity. This contradiction brings great difficulties to the preparation of radar and infrared compatible stealth materials. [0003] Currently researched radar and infrared compatible stealth materials are mainly divided into two types: single type and composite type. The forme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/04B32B17/04B32B37/02
Inventor 程海峰王义周永江楚增勇
Owner NAT UNIV OF DEFENSE TECH
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