Millimeter-wave emission characteristics of bilayer radar-infrared compound stealth material

Abstract

To achieve radar and infrared stealth, an infrared stealth layer is usually added to the radar absorbing material (RAM) of stealth aircraft. By analyzing the millimeter-wave (MMW) emissivities of three stealth materials, this Letter investigates the impact of the added infrared stealth layer on the originally "hot" MMW emission of RAM. The theoretical and measured results indicate that, compared with the monolayer RAM, the MMW emission of the bilayer material is still strong and its emissivity is reduced by 0.1-0.2 at almost every incident angle. The results partially demonstrate the feasibility of detecting stealth aircraft coated with this bilayer stealth material.

Absorption characteristics of a typical photonic crystal unidirectional absorber under graphene modulation

“…Currently, radar detection and infrared detection are the two most effective and common detection technologies. Therefore, infrared radar-compatible stealth materials 1 , 2 have become a key research target for scholars. The requirements of stealth materials for both radar and infrared wavelengths are mutually constrained.…”