Infrared stealth film for radar antenna and preparation method thereof

Abstract

The invention relates to an infrared stealth film for a radar antenna and a preparation method of the infrared stealth film; the film is of a multi-layer film structure, the multi-layer film structurecomprises a substrate, and high-refractive-index material layers and low-refractive-index material layers which are sequentially and alternately stacked on the substrate from inside to outside, and the specific arrangement is SUB|(H1L1)m(H2L2)n|AIR, wherein SUB is a substrate, AIR represents air, H1 and H2 represent high-refractive-index materials with two thicknesses, L1 and L2 represent low-refractive-index materials with two thicknesses, and each layer has a specific physical thickness, and m and n represent the number of layers. According to the invention, low emission is realized on a common infrared detection waveband, high emission is realized on other wavebands, and the material and the substrate have high-transmittance characteristics on radar waves, so that the radar antenna canwork normally, and effective invisibility and timely dissipation of a heat source target can be realized.

Description

technical field [0001] The invention belongs to the technical field of military camouflage, and in particular relates to an infrared stealth film used for a radar antenna and a preparation method thereof. Background technique [0002] On the modern battlefield, our radar targets are faced with the threat of the enemy's precision-guided weapons, especially infrared reconnaissance and guided weapons. Due to the need to send and receive signals, radar antennas are often deployed in prominent positions with unique shapes and large volumes. The heat generated during operation will make radar antennas a significant heat source target in typical backgrounds. The heat comes from the thermal energy generated by the antenna vibrator to send and receive signals, and the heat energy converted from electromagnetic energy by the radar coating and radome absorbing signal waves. Obviously, these energies are difficult to eliminate. Therefore, effective stealth measures must be taken for th...

AI Technical Summary

Problems solved by technology

The surface of the antenna is often coated with paint to achieve visible light stealth, but traditional paints are often difficult to achieve low emissivity, which is also an important reason why radar antennas become infrared bright targets in the background

The low-emissivity coating often reduces the surface emissivity by doping metal powder such as copper and iron. Obviously, this coating is not suitable for radar antennas, which not only affects the normal transmission of radar waves, but also causes more and larger Heat accumulation, limited stealth effect

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