What is an optically transparent absorbing material? It is pointed out that optically transparent absorbing materials can be divided into two categories: absorption type and reflection type. Absorbing optically transparent absorbing materials require that the radar wave is completely lost in the transparent film. Nowadays, there are mainly two kinds of transparent conductive polymer and circuit analog type wave absorbing materials. Reflective optically transparent absorbing materials require relatively good light transmission and emission characteristics, and can be divided into metal good conductor films and metal oxide films.
Traditional absorbing materials take strong absorption as the main goal, while new absorbing materials are required to meet the requirements of "thin, light, wide, and strong", while future absorbing materials should meet the requirements of multi-spectrum stealth, ocean climate resistance, environmental adaptation, Higher requirements such as high temperature resistance and radiation resistance are used to adapt to the increasingly harsh future battlefield. Among them, multi-spectrum stealth materials and smart stealth materials will become the two main directions of radar absorbing materials.
So far, absorbing materials have been aimed at centimeter-wave radars, and advanced infrared detectors, millimeter-wave radars and other advanced detectors have also come out. It is required that absorbing materials can be developed to be compatible with meter-wave and millimeter-wave in the near future. Multi-spectrum stealth materials such as multi-band electromagnetic stealth materials such as, centimeter wave, infrared, and laser.
Intelligent material is a material system with sensing function, information processing function, self-instruction and response to signals. At present, this kind of emerging smart materials and structures have been widely used in the military and aerospace fields. At the same time, this concept of adjusting its structure and performance according to environmental changes and making the best response to the environment also provides a new idea for the design of stealth materials and structures, making it possible to realize the goal of intelligent stealth.