Abstract
The compatible stealth functionality in the infrared (IR) and radar wave bands is the most important research topic in the field of stealth material technology. Here, a new hybrid metasurface (HMS) for infrared-multiband radar stealth-compatible materials was proposed and studied. Two specifically designed metasurface layers that can control the infrared emission and microwave absorption were combined to realize radar and IR bi-stealth. The simulated and experimental results show that the HMS has five strong absorption peaks at f 1 = 6.35, f 2 = 8.38, f 3 = 12.10, f 4 = 15.37 and f 5 = 18.05 GHz. In addition, the emissivity of the proposed HMS is less than 0.32 from 3 to 14 μm and shows low emissivity characteristics in the infrared band. These results demonstrate that the proposal has practical application to multispectral stealth technology.
Highlights
Stealth technology is the most important technology for the development of military power under the condition of informational warfare [1]–[5]
The infrared shielding layer (IRSL) has highefficiency transmission for microwaves below 20 GHz which is below its resonant frequency
To better understand the absorption behavior of the proposed hybrid metasurface (HMS), we further investigate the distribution of the z-component electric field Ez at the resonant frequencies
Summary
Stealth technology is the most important technology for the development of military power under the condition of informational warfare [1]–[5]. The emissivity of the proposed HMS is less than 0.32 in the IR band of 3–14 μm These results are very significant for radar-infrared stealth- compatibility applications. IRSL DESIGN To achieve infrared-multiband radar stealth-compatibility the development of coating materials with low infrared emissivity is a major problem. The larger the copper filling ratio is, the lower the IR emissivity Both high microwave transmissivity and low IR emissivity should be consideredsimultaneously when optimizing the structural parameter of the patch width. DESIGN OF IR-RADAR BI-STEALTH STRUCTURE Based on the preceding analysis in sections A and B, due to the completely opposite stealth principles in the microwave and IR wavelength bands, the HMS is composed of two different-sized copper structures. The unit cell has periodic dimensions of 16 mm, and there are 16 × 16 subcells in the IRSL and a 1 × 1 sub-cell in the RAL in one repeated period
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