Hybrid Metasurfaces for Infrared-Multiband Radar Stealth-Compatible Materials Applications

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 <inline-formula> <tex-math notation="LaTeX">$f_{1}=6.35$ </tex-math></inline-formula>, <inline-formula> <tex-math notation="LaTeX">$f_{2}=8.38$ </tex-math></inline-formula>, <inline-formula> <tex-math notation="LaTeX">$f_{3}=12.10$ </tex-math></inline-formula>, <inline-formula> <tex-math notation="LaTeX">$f_{4}=15.37$ </tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$f_{5}=18.05$ </tex-math></inline-formula> GHz. In addition, the emissivity of the proposed HMS is less than 0.32 from 3 to <inline-formula> <tex-math notation="LaTeX">$14~\mu \text{m}$ </tex-math></inline-formula> and shows low emissivity characteristics in the infrared band. These results demonstrate that the proposal has practical application to multispectral stealth technology.