Radar and infrared compatible stealth material based double-layer frequency selective surface and preparation method of radar and infrared compatible stealth material

A frequency selective surface, stealth material technology, applied in the field of radar absorbing materials, to meet the needs of light weight, reduce weight, and excellent anti-oxidation effect

Active Publication Date: 2016-10-12
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Based on the above analysis, there is still no radar infrared compatible stealth material that can be applied to high temperature environments, and it is urgent to propose radar infrared compatible stealth materials with high temperature resistance and corresponding preparation methods

Method used

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  • Radar and infrared compatible stealth material based double-layer frequency selective surface and preparation method of radar and infrared compatible stealth material
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  • Radar and infrared compatible stealth material based double-layer frequency selective surface and preparation method of radar and infrared compatible stealth material

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Embodiment 1

[0049] A radar and infrared compatible stealth material based on a double-layer frequency selective surface of the present invention, such as figure 1 As shown, it includes a dielectric base layer, a resistive capacitive frequency selective surface layer (RCFSS layer), an intermediate dielectric layer, and a metal type capacitive frequency selective surface layer (MCFSS layer) from the inside to the outside; wherein, the material of the dielectric base layer The mullite fiber reinforced mullite-based composite material is used, and the thickness of the dielectric base layer is 2.65mm; the resistive capacitive frequency selective surface layer (RCFSS layer) is composed of a periodic pattern of high-temperature resistant resistance coating (ruthenium dioxide system Glass-based resistance coating), the thickness of the high temperature resistant coating is 0.02mm, the periodic pattern is a square patch pattern distributed in a matrix, the side length of the matrix unit where the s...

Embodiment 2

[0062] A radar and infrared compatible stealth material based on a double-layer frequency selective surface of the present invention, such as figure 1 As shown, it includes a dielectric base layer, a resistive capacitive frequency selective surface layer (RCFSS layer), an intermediate dielectric layer, and a metal type capacitive frequency selective surface layer (MCFSS layer) from the inside to the outside; wherein, the material of the dielectric base layer Alumina fiber-reinforced alumina-based composite materials are used, and the thickness of the dielectric base layer is 1.62mm; the resistance-type capacitive frequency-selective surface layer (RCFSS layer) is composed of a periodic pattern of high-temperature-resistant resistance coating (ruthenium dioxide-based glass substrate) resistance coating), the thickness of the high-temperature-resistant coating is 0.02mm, and the periodic pattern is a square patch pattern distributed in a matrix. The side length of the matrix unit...

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Abstract

The invention discloses a radar and infrared compatible stealth material based on a double-layer frequency selective surface. The radar and infrared compatible stealth material adopts a layered structure and comprises a dielectric substrate layer, a resistor type capacitive frequency selective surface layer, an intermediate dielectric layer and a metal type capacitive frequency selective surface layer from inside to outside sequentially. The preparation method comprises steps as follows: the dielectric substrate layer is selected and prepared firstly, and the resistor type capacitive frequency selective surface layer is prepared on the dielectric substrate layer with a silk-screen printing technology; then the intermediate dielectric layer is prepared on the resistor type capacitive frequency selective surface layer with a brush-coating technology; finally, a metal plating film is prepared on the intermediate dielectric layer with a physical deposition technology, the frequency selective surface is prepared from the metal plating film through etching with a laser technology, and the radar and infrared compatible stealth material is prepared. The high-temperature-resistant radar and infrared compatible stealth material can be resistant to high temperature of at least 1,000 DEG C or higher, and has better high temperature resistance and excellent oxidation resistance.

Description

technical field [0001] The invention belongs to radar absorbing materials, in particular to a radar and infrared compatible stealth material based on a double-layer frequency selective surface and a preparation method thereof. Background technique [0002] With the rapid development of multi-spectral detection and guidance technology, single-function stealth materials can no longer meet the needs of equipment development. Multi-band compatible stealth materials, especially radar and infrared compatible stealth materials, have become the development direction of stealth materials research. However, there are still some contradictions in realizing the integration (that is, mutual compatibility) of materials in radar and infrared stealth functions. The reason is that radar stealth requires strong absorption and low reflection of electromagnetic waves, while infrared stealth requires low absorption and high reflection. Therefore, how to solve the contradiction between the two t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/52C03C8/10C09K3/00
CPCC03C8/10C04B41/009C04B41/52C04B2111/00258C04B2235/5232C09K3/00C04B35/803C04B35/185C04B41/5072C04B41/5022C04B41/5122
Inventor 刘海韬田浩黄文质程海峰周永江
Owner NAT UNIV OF DEFENSE TECH
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