Radars come in many types, and the methods of classification are also very complex. They are generally military radars. They can usually be classified according to their use, such as early warning radar, search and surveillance radar, guidance and control radar, gun-laying radar, altimeter radar, battlefield surveillance radar, airborne radar, radio altimeter radar, radar fuze, weather radar, air traffic control radar, navigation radar, and collision avoidance and identification friend or foe radar, etc.

　　1. Classified by radar signal form, there are pulse radar, continuous wave radar, pulse compression radar, and frequency agility radar, etc.

　　2. Classified by angle tracking method, there are monopulse radar, conical scan radar, and covert conical scan radar, etc.

　　3. Classified by parameters of target measurement, there are altimeter radar, two-coordinate radar, three-coordinate radar, identification friend or foe radar, and multi-station radar, etc.

　　4. Classified by the technology and signal processing methods used by the radar, there are coherent accumulation and non-coherent accumulation, moving target indication, moving target detection, pulse Doppler radar, synthetic aperture radar, scan-while-track radar.

　　5. Classified by antenna scanning method, there are mechanically scanned radar, phased array radar, etc.

　　6. Classified by radar frequency band, there are over-the-horizon radar, microwave radar, millimeter-wave radar, and laser radar, etc.

　　Among them, phased array radar, also known as phased array radar, is a radar that changes the direction of the beam by changing the phase of the radar wave. Because it uses electronic control of the beam instead of the traditional mechanical rotation of the antenna surface, it is also called electronic scanning radar. Phased array technology emerged as early as the late 1930s. In 1937, the United States was the first to start this research. However, it was not until the mid-1950s that two practical shipborne phased array radars were developed. In the 1980s, phased array radar, due to its many unique advantages, was further applied. In the new generation of medium- and long-range air defense missile weapon systems that have been equipped and are under development, multi-functional phased array radars are often used. It has become an important symbol of the third generation of medium- and long-range air defense missile weapon systems. As a result, the combat performance of air defense missile weapon systems has been greatly improved. In the 21st century, with the continuous development of science and technology and the characteristics of modern warfare weapons, the manufacturing and research of phased array radar will be taken to a higher level.