Phased Radar

Phased array radar Phased array radar is a new type of active electronic scanning array multifunction radar. It not only has the function of conventional radar, but also other RF functions. Active electronic scanning array of the most important feature is to direct radiation into the air and receive RF energy. It is compared with the mechanical scanning antenna system, there are many significant advantages. For example, phased array antenna is omitted, the entire drive system, in which the failure of individual components, still maintain a high reliability, MTBF is 100,000 hours, while the mechanical scanning radar antenna MTBF is less than 1000 hours. The following describes the advanced phased array radar.
directory
overview of phased array radar principles of classification of phased array radar, phased array radar, the characteristics of the principle drawbacks of phased array radar overview of phased array technology, as early as 30 years late to have emerged. In 1937, the United States first began this research. However, until the mid 50's developed two practical shipboard phased array radar. 60 years, the United States and the former Soviet Union have been developed and equipped with multiple phased array radar, used for ballistic missile defense systems, such as the United States AN/FPS-46, AN / FPS-85, MAR, MSR, the former Soviet Union's cage These are all fixed large phased array radar, which in common: A fixed planar array antenna, the antenna size of large, high radiation power, the role distance. Which the United States and the former Soviet Union AN/FPS-85 such as Britain, France, Japan, Italy, Germany and Sweden. The most typical are: the United States AN/TPN-25, AN/TPQ-37 and GE-592, British AR-3D, France AN/TPN-25, Japan, NPM-510 and J/NPQ-P7, Italy RAT-31S, a 75 KR German and so on. This period of phased array radar has high mobility, small antenna, antenna scanning diversity system wide application and so on. 80 years, phased array radar has many unique advantages as obtained further applications. That has developed a new generation of equipment and are in range air defense missile weapon system in the use of multi-function phased array radar, it has become the third generation, long-range air defense missile weapon system is an important sign. Thus, greatly improving the air defense missile weapon system operational performance. In the 21st century, phased array radar, and as technology continues to develop the characteristics of modern warfare weapons, and its manufacturing and research will be a higher level. Principles of phased array of phased array is composed of many radiating elements arranged in the form of composition to the antenna array, each unit of radiation energy and the phase between the off can be controlled. A typical phased array is the use of computer controlled phase shifter changes the phase distribution on the antenna aperture to achieve beam scanning in space, the electronic scanning, referred to as power sweep. Phase control can be phase method , real-time method, frequency method,onitsuka, and electronic feed switch method. Arranged in one dimension is the number of radiating element array, arranged in two dimensions on the number of units known as the plane array of radiation. Radiating elements can also be arranged on a curve or surface. This antenna is called conformal array antenna. Conformal array antenna can overcome the linear array and planar array scan angle minor faults, can an electronic scanning antenna for full airspace. The usual conformal array antenna with circular array, circular array surface, conical surface array, the cylindrical array, the hemisphere array and so on. In conclusion, phased array radar antenna phased its formation its name. Category phased array radar can be divided into two categories, namely, all-electric scanning phased array and the limited power phased array scanning. All-electric scanning phased array can be fixed, said phased array, the azimuth and elevation that are used on the power sweep, the antenna array is stationary. Limited electronic scanning phased array antenna is a hybrid design,onitsuka tiger mexico 66 yellow and black, that is, to combine two or more antenna technology to achieve the desired effect, with an initial phase scanning technology and reflector antenna technology, the power sweep angle is small, only a small number of radiating elements, it can greatly reduce the equipment cost and complexity. Antenna array, according to the situation can be divided into phase scan sweep, frequency sweep, phase / phase sweep, the phase / frequency scanning, machine / phase sweep, machine / frequency sweep, sweep, and other limited system. Phase sweeping series of changes in the use phase shifters to achieve the phase relationship of the beam power sweep. Frequency sweep is to use the method to change the operating frequency to achieve electronic beam scanning. Phase / phase sweep is the use of control plane phase shifter array to achieve beam power coordinates of two corners sweep. Phase / frequency scanning is the use of control plane array phase shifter and the other coordinates by a coordinate change of frequency control to achieve the beam power sweep. Machine / phase sweep is a sweep in the direction on the use of machines, elevation on the use of the phase sweep. Machine / frequency sweep is the sweep in the direction on the use of machines, elevation on the use of the frequency sweep. Characteristics of phased array radar Phased array radar possesses great vitality, as it better than the general mechanical scanning radar. It has the following characteristics: (1) can deal with multiple objectives. Phased array radar using electronic scanning flexibility, speed and time division multiple-beam principle, achievable way of side tracking of the search side, compatible with the computer, can simultaneously search, detect and track different directions and different heights and more approved targets and simultaneously attack guided missiles and more than air targets. Therefore, for multi-objective, multi-directional, multi- level air combat environment. (2) multi-function, easy to maneuver. Phased array radar can simultaneously control the formation of multiple independent beam, respectively, to perform a search, detection, identification, tracking, target illumination and tracking, guided missiles and other features. A phased array radar can play the role of multiple dedicated radar, such as function, but also far they are able to simultaneously deal with multiple objectives. Therefore, it can greatly reduce the weapon system equipment to improve mobility. (3) reaction time is short, the data rate. Phased array radar antenna drive system can not,timberland water shoes, point to a flexible beam can quickly scan the inertia-free, reducing the target signal detection, admission, the time required for information transmission, etc., with high data rates. Phased array antenna is usually the use of digital works, so that radar and digital computer together, can greatly increase the degree of automation to simplify radar operation, shortening the target search, tracking and control and launch preparation time, for fast and accurate implementation of the plot of procedures and data processing. Thus improve the tracking of air speed maneuvering targets. (4) anti-jamming ability. Phased array radar antenna aperture distribution can be used on more than one radiating element integrated into the very high power and energy can reasonably manage and control the main lobe gain, according to the needs of different directions on the distribution of the different emission energy, easy to implement Adaptive Sidelobe suppression and adaptive anti-kinds of interference, that far from conducive to the goals and objectives of the small radar reflectors (such as stealth aircraft), but also enhance the anti-radiation missile. (5) high reliability. Phased array radar array group more, and in parallel, even if a small amount of component failure, can still work, suddenly the possibility of complete failure of the minimum. In addition, with the development of solid-state devices, solid-state phased array radar grid more and more devices, and even children have produced solid-state phased array radar, such as the United States. The weakness of course, phased array radar is not perfect, also has its drawbacks. Mainly the cost of your typical phased array radar, the radar than the average cost to be several times higher. In addition, phased array radar for the short-range ballistic missile attacks can be said to be powerless, and this is why the United States and Taiwan worried about the mainland east missiles deployed in coastal Fujian reasons. The 1991 Gulf War, Iraq,vibram five fingers kso black, with together, a number of radiation sources to work together. Equivalent to the common observation of a different radar target. Multi-point observations make more accurate observations, as two coordinates fixed to a point. More Atlas Atlas entry Open Category: military, radar technology