Application of conductive slip ring in radar field

　　 In the high-end fields of military radar, aerospace, tanks and other equipment, there are many requirements such as revolution, rotation and multiple relative motion. That is to say, while the 360° continuous rotating body of the mechanical equipment moves, the rotating body also needs multiple words of movement. If there is movement, energy is needed, such as electric energy, fluid pressure energy and so on. Sometimes, it is necessary to control the signal source, such as optical fiber signal, high frequency signal, etc. Electrical components that need to transmit functional power, weak current signals, light signals, air pressure, water pressure, oil pressure and other different energy media between any relatively continuous rotation of 360° are required to ensure that the electrical appliances can rotate freely during rotation. Must use rotating connection device-namely conductive slip ring.

　　 Maybe more people already know it. The original English meaning of radar is actually like many scientific and technological terms. It is an abbreviation, literally meaning radio (RAdio), detection (Detection) and range (AndRange). Although modern radar can not only measure and locate targets in three-dimensional space, but also enable guided missiles to attack targets, but the basic principle is to use radio waves to measure the distance and direction of objects through the echoes reflected by objects. That is, electromagnetic waves are used as the medium to detect the existence of objects. Therefore, when it comes to radar, it is necessary to first talk about the electromagnetic spectrum. From a purely military perspective, only by understanding the electromagnetic spectrum can we grasp the connotation of electronic warfare. As an airborne radar, the greater the power, the longer the detection range, and the lower the ability to detect low-altitude targets. Electromagnetic waves have many physical properties, such as the ability of infrared rays to radiate above absolute zero. The Sidewinder missile uses infrared rays radiated by the target to attack its prey. Of course, it also has energy radiation and physical penetration, etc. One of which is worthy of our attention is that the higher the electromagnetic wave frequency, the shorter the wavelength. In the field of military applications, radio waves of different frequencies have different specific uses, and radio waves with frequencies exceeding 10X12Hz enter the field of light waves, and the world of optoelectronics begins.

　　 In order to break through some of the current radar bottlenecks, the United States took the lead in developing phase alignment radar technology, and in recent years entered the field of all solid phase alignment. The phased array refers to an antenna array whose phase can be controlled. The characteristic of this radar is that it does not need to be rotated, and it can transmit and receive multiple beams at the same time. It integrates search, tracking, illumination, guidance and even identification of friend or friend, which is not only simplified It is deployed, and its antenna is composed of thousands of transmit/receive (T/R) modules. The scanning speed is extremely fast, one million times that of mechanical rotating radar, and the reliability is extremely high. After several years of use, even if some T/R modules are damaged, they do not need to be repaired, and good radar functions can still be maintained. In addition, its method of randomly transmitting and receiving different multi-beams gives it the best electronic anti-resistance capability among all current radar technologies, and becomes the mainstream of a new generation of radar in the future. At present, the U.S. Navy has deployed the shipboard Aegis (Aegis) fleet defense system, and its four-sided AN/SPY-1 phased array antenna is impressive. Each radar controls the 90-degree quadrant airspace, and can search, detect and track at the same time. Because the antenna itself does not need to be rotated, each T/R in the radar antenna can be leveled to 85 kilometers away from the horizontal with a single radar beam. The search is continued with a radius of 325 kilometers. Once the radar finds the target, it will immediately launch dozens of narrow pen-shaped waves to the target within 1 second to provide the AN-SPG-62 illumination radar with the target's speed, distance, height, direction, etc. Zhu Yuan in order to fight. The main air defense weapon on the ship, the Standard-2 (SM-2) surface-to-air missile under the guidance of AN/SPY-1, is only handed over to the illuminating radar only a few seconds before hitting the target. Therefore, the four AN-SPG- 62 can engage in multiple battles in a very short period of time, which gives the Aegis the ability to deal with saturation attacks. In terms of preventing anti-radiation missile attacks, the radio waves of the American Aegis cruiser AN/SPY-1A can disappear in the air within half a second. However, if the radar system is activated again, there is a delay of more than 10 seconds to update all tactical data and rescan the memory. The threat source in. Its other unique trick is to focus on detecting the quadrants where threats may appear while keeping the radio silence of other radars. The method of attacking the "Aegis" has actually been an open secret since the end of the Cold War. In short, the method is to detonate an electromagnetic pulse warhead near the US ship, causing the ship’s electronic equipment to instantaneously overload and lose complete combat capability. When it comes down, it is the same as attacking a normal enemy ship, with a volley of anti-ship missiles. Although European countries lack the technical reserves to develop large-scale carrier-based phased array radars similar to AEGIS, a number of small phased array radars such as "SMRT-L" D-band PAR and "APAR" will follow one after another. In service at the beginning of the century. China will also make breakthroughs in shipborne large-scale phased array radar in the near future, and we will wait and see.