High-temperature multispectral stealth metastructure from the microwave-infrared compatible design

Microwave and infrared stealth technology plays an important role in the development of military equipment and national defense. However, with the development of high Mach number weapons, it is urgent to develop the new materials with high temperature multispectral compatible stealth. In this paper, a new multispectral stealth metastructure is proposed, which can achieve high temperature microwave absorption and infrared stealth simultaneously. The metastructure is optimized based on Large-Mutation Genetic Algorithm (LMGA), and the high temperature resistant patterned resistive film (PRF) is reasonably distributed to dissipate the incident microwave energy. The high temperature infrared stealth is realized by the dual regulation of high-strength thermal insulation skeleton and low emissivity infrared metasurface to reduce target infrared radiation. Effective bandwidth (≤−10 dB) at 1000 °C is 2–3.5 GHz and 5.4–18 GHz. Low thermal insulation (∼0.104 W/(m·k)) and low infrared emissivity (∼0.39 at 800 °C) can reduce the target infrared radiation energy by 91.7%. This research provides an effective way to design microwave infrared compatible stealthy materials with huge multifunction.