Chapter 2105: Anti-stealth solution

Invisibility, there are many sayings. For example, in many sci-fi movies, it is said that someone is invisible and can do whatever you want. This kind of invisibility refers to the invisibility of sight and watching in the visible light. Not anymore, and for fighter jets, visual stealth is no longer useful. It is not the era of cannon air combat. With the current development, missiles have become an important means of attack, so correspondingly, they are used to guide missiles. Radar is the most important thing. All stealth machines are hidden in front of the radar.
However, the band of electromagnetic waves radiated by radar is quite wide. For electromagnetic waves, the longer the wavelength, the easier it is to diffract, that is, to bypass obstacles. Therefore, the original radio is long-wave. For example, the Navy’s submarine uses long-wave radio.
Long waves can propagate around the earth, which is quite useful. However, because of its long wavelength, long waves have a low frequency and transmit data very slowly. Moreover, the receiving and transmitting equipment is quite large and will soon be obsolete.
Medium wave is used for television broadcasting. In the use of radar, almost all centimeter waves and millimeter waves in the short wave band, etc., have short wavelengths and can propagate along a straight line. This is also necessary for radar, and radar is used at the same time. The antenna diameter is also small, so it is now mainstream.
The stealth machine is invisible to this waveband, passing through various surface shapes, reflecting radar waves to other places, using wave-absorbing materials to absorb radar waves, and so on.
Then, correspondingly, there is a very straightforward way to crack the stealth machine.
"We can use the meter wave radar first." Qin Guan said.
As the name suggests, the meter wave radar refers to the wavelength of the radar wave, which is on the order of meters. If the frequency is converted between one and ten meters, it is 30 to 300 MHz. This kind of radar, at the beginning, is one Kind of mainstream.
You can watch movies during World War II. Many radar antennas are large, like Yagi antennas like TV receiver antennas. This is the meter wave radar.
However, the meter wave radar was quickly eliminated. This kind of radar has too many shortcomings. Because it is of the order of the meter wave, its accuracy is quite poor when it detects the target. When the target is found, the error At hundreds of meters, or even thousands of meters, it is still possible to guide the aircraft in the past for reconnaissance. If you guide the missile to attack, you will definitely not find the target.
At the same time, many civil signals, especially TV signals, are also in the meter wave band, so there will be a problem of civil signal interference.
These problems are not adjustable, so after the end of World War II, the meter wave radar was quickly put on the shelf. It was used as a long-range air defense radar at best, and could not play a greater role in air defense operations.
But now, the meter wave radar will come back soon. One of its biggest advantages is the anti-stealth aircraft! In front of the meter wave radar, the stealth method of the stealth machine is useless at all!
For example, take a look at the most advanced guided-missile destroyer of the later Han country. At the time of the 052C, there were only four-sided phased array, plus a roof radar, etc. However, when it reached the 052D, a huge and complicated Yagi antenna appeared behind. , That kind of radar is used for long-range early warning, adding it, of course, is to deal with the increasing threat of stealth aircraft.
It can be said that when the Han country developed to 052D, the destroyer had truly matured. This kind of complex Yagi antenna was used for long-range early warning and the other side's stealth aircraft was discovered. However, the accuracy of this radar is limited and cannot To guide missile operations, at this time, you need to cooperate with the front phased array radar. The phased array radar will gather all the beams in the past, and you can definitely find a stealth machine.
Now, in the development of radar, the meter wave radar is almost abandoned. Now, Qin Guan has thrown out this point of view to everyone. We have to pick up our own meter wave radar. After all, Han is now There are still many meter wave radars in use in China’s national air defense.
"But the accuracy of the meter wave radar is not enough." Someone put forward this point of view.
"Yes, the current accuracy of the meter wave radar is definitely not enough to guide our missiles." Qin Guan said: "However, we can use technical means to solve it."
What use did you find out? Raise the air defense alarm? Not only need to be able to detect, but also to be able to attack the opponent, so that's it. The accuracy of the meter wave radar is not enough. How do we solve it?
"We are divided into two situations." After Qin Guan said it, his thoughts were very broad: "At sea, we need to add a meter wave radar to our Aegis warship, and use the meter wave radar to provide general directions. , And then use our phased array radar to spot it while guiding the missile attack."
The way Qin Guan said it immediately made everyone’s eyes bright. Yeah, when it comes to stealth aircraft, it should be called a low detectable aircraft. It is difficult for radar to detect it, but it does not mean that it cannot be detected. If a large number of radar beams are used After gathering there, you will be able to find it.
"On land, we can do the same. Our land also has a similar system. It is completely possible to use this method. The meter wave radar finds the target and the Red Flag 9 system attacks. Of course, there are other ways." Qin Guan Continue to introduce: "We can also deploy several meter wave radar stations separately, and then build a network. Through the calculation of the computer system, the accuracy can be greatly improved, and it can even meet the needs of guiding the missile."
A radar cannot accurately locate, what if there are several? Several units can be networked. After the network is connected, the accuracy can be improved through computer operations.
The most important thing is that ordinary meter-wave radars are all two-coordinate radar systems, which can only provide azimuth but not altitude information, so they cannot guide missile attacks. After the network is formed, the third altitude can also be measured. from.
This is another scheme. Now Han Guo has advanced electronic technology, which can completely realize this kind of calculation.
"These are the simplest and most straightforward solutions, and there is a complex solution that should have better results." Qin Guan looked at the crowd and said, "That is, to study the phased array radar of Mi Wave."
"Meepo phased array?" Hearing Qin Guan's words, the radar experts present were stunned. Is this possible?
"Yes, it is the meter wave phased array radar." Qin Guan said: "Moreover, it is the active phased array, the three-coordinate phased array. It is the best land air defense that can make all stealth aircraft invisible. The radar system, speaking of shortcomings, its only shortcoming is that it is too big!"