1、 Introduction
As an important weapon in modern warfare, the stealth performance of stealth aircraft is receiving increasing attention. Among them,
Radar absorbing materialAs one of the key technologies, it plays an important role in improving stealth performance. This article will discuss the non-metallic materials or radar absorbing materials used in stealth aircraft, the classification and characteristics of radar absorbing materials, and other aspects.
2、 Non metallic materials or radar absorbing materials used in stealth aircraft
The non-metallic materials or radar absorbing materials used in stealth aircraft refer to materials that can absorb radar energy rather than reflect it. By using these materials, it is possible to reduce the reflected signals of aircraft under radar and improve stealth capabilities.
3、 Classification and Characteristics of Radar Absorbing Materials
Radar absorbing materials are mainly divided into resonant type and wideband type. Resonant radar absorbing materials are specifically designed for a certain frequency, combining destructive interference and attenuation based on magnetic materials. Wideband radar absorbing materials are made by adding carbon energy dissipation plastic materials into polyurethane foam and other matrices, which can maintain effectiveness in a wide frequency range.
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Radar absorbing material
Application in stealth aircraft
Combining radar absorbing materials with rigid materials through which radar energy passes can form
Radar absorbing structural materialsFurther improve the stealth performance of stealth aircraft. By using the latest materials, the energy reflected by stealth aircraft on radar is almost equivalent to that of sparrows, making it extremely difficult to distinguish stealth aircraft solely by radar.
5、 Other factors that affect stealth performance
In addition to radar absorbing materials, there are also other factors that can affect the stealth performance of stealth aircraft. Firstly, there are strong reflection points or bright spots on the fuselage, which can easily cause radar signal reflection and expose the existence of the aircraft. Next is the noise from the engine, which is captured by radar and reveals the position of the aircraft. Finally, there is the thermal radiation of the aircraft itself, which can also be detected by radar. In order to reduce the impact of these factors on stealth performance, some stealth aircraft have taken measures, such as the SR-71 Blackbird aircraft using a closed-loop cooling system to transfer the heat from the fuselage to fuel or dissipate it at frequencies with limited atmospheric heat transfer.
6、 Conclusion
in summary,
Invisible aircraft radar absorbing materialIt has played an important role in improving the stealth performance of aircraft. By using non-metallic materials or radar absorbing materials, the reflected signals of aircraft under radar can be reduced. At the same time, stealth aircraft also need to pay attention to reducing strong reflection points, controlling engine noise, and reducing thermal radiation to further improve stealth performance. In the future, with the continuous advancement of technology, there will be more innovative stealth technologies applied to stealth aircraft, providing strong support for modern warfare.
