There are many types of radar, and the classification methods are also very complex. Usually military radar. Generally, radar can be classified according to its purpose, 

such as early warning radar, search and alert radar, guidance and command radar, artillery sight radar, height measurement radar, battlefield surveillance radar, 

airborne radar, radio height measurement radar, radar fuse, meteorological radar, navigation control radar, and collision avoidance and identification of friend or foe radar.

According to the form of radar signals, there are pulse radar, continuous wave radar, pulse compression radar, and frequency agile radar.

According to the angle tracking method, there are single pulse radar, cone scanning radar, and concealed cone scanning radar.

3. According to the parameters measured by the target, there are altimetry radar, two coordinate radar, three coordinate radar, identification of friend or foe radar, multi station radar, etc.

4. According to the technology and signal processing methods used in radar, there are coherent accumulation and non coherent accumulation, moving target display, 

moving target detection, pulse Doppler radar, synthetic aperture radar, and scanning and tracking radar.

5. According to the antenna scanning method, it can be classified into mechanical scanning radar, phased array radar, etc.

6. According to radar frequency bands, it can be divided into over the horizon radar, microwave radar, millimeter wave radar, and laser radar.

Among them, phased array radar, also known as phased array radar, is a type of radar that changes the direction of the beam by changing the phase of the radar wave. 

Because it controls the beam electronically rather than the traditional mechanical rotation of the antenna surface, it is also known as electronic scanning radar phased array technology, 

which appeared as early as the late 1930s. In 1937, the United States first began this research work. But it was not until the mid-1950s that two practical shipborne phased array 

radars were developed. In the 1980s, phased array radar was further applied due to its many unique advantages. Multi functional phased array radar is commonly used in the newly

 equipped and under development generation of medium and long-range air defense missile weapon systems, and it has become an important symbol of the third generation of 

medium and long-range air defense missile weapon systems. Thus, the combat performance of the air defense missile weapon system has been greatly improved. In the 21st century, 

with the continuous development of technology and the characteristics of modern warfare weapons, the manufacturing and research of phased array radar will reach a higher level