Radar and infrared compatible stealthy material and preparation method thereof

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...

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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

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