Stealth aircraft is developed by using various stealth technologies according to the working principle and performance of various detection systems of detection aircraft and various information characteristics of the target aircraft. In the field of research and application of aircraft stealth technology, the United States is in a leading position, followed by Western Europe, Japan and Russia. As early as the early 1960s, the United States successfully developed a stealth high-altitude reconnaissance plane. At present, its first generation stealth fighter has been in service for many years and participated in high-tech local wars many times. With practical experience, the second generation B-2 stealth fighter has also been successfully developed. By 265438+the beginning of the 20th century, the US military will have new F-22 stealth fighter, F/A-X stealth attack/fighter, MRF multi-purpose stealth fighter, RAH-66 Comanche stealth helicopter and the third generation attack fighter with stealth characteristics. The stealth aircraft being developed by western European countries is the successor of "Eurofighter", and Russia is also developing CASF stealth fighter and Su -—60S stealth bomber which is expected to be equipped with 20 10 troops.

Generally speaking, the development of stealth aircraft has the following trends: First, there will be more and more types of stealth aircraft. All kinds of stealth fighters, bombers, reconnaissance planes, drones and helicopters with stealth performance will appear one after another, and gradually form a complete series structure. Second, the radar reflection cross section of stealth aircraft will continue to decrease. At present, the radar reflection cross section of stealth aircraft is 1 ~ 2 orders of magnitude lower than that of ordinary aircraft. For example, the radar reflection cross section of B- 1A bomber is110 of B-52, and B- 1B is 1A. F- 1 17A fighter radar reflection cross section is less than 0? 1 m2, B-2 bomber is only 0? 1 m2, the radar reflection cross section of the future F-22 fighter is only F- 15 1%. Third, stealth aircraft will have a variety of stealth characteristics. B-2 and F- 1 17A both adopt various stealth technologies, and have various stealth performances such as anti-infrared and anti-radar. In the future, stealth aircraft will continue to develop in the direction with stealth characteristics as much as possible. Fourth, attach importance to stealth modification of active aircraft and develop aircraft with partial stealth characteristics. For example, India will secretly modify its main fighters, such as Jaguar, Mirage 2000H and MiG -29, and install radar absorbing materials to reduce its radar reflection cross section by 70%.