"Can't sleep?" By the time Qin Feng returned home, Xiaohutou had already fallen asleep, and Gu Tingting was still waiting for Qin Feng on the bed, after Qin Feng went to bed, he tossed and turned, but he couldn't fall asleep, as long as he closed his eyes, he could think of this kind of stealth machine, although what Song Lao said had already relieved Qin Feng, since his current technology could not be reached, it was in vain, it was better to be down-to-earth and do the things in front of him, but when Qin Feng thought of this thing, he could no longer fall asleep.

"Perhaps, you can give Xiaoxue a call." Gu Tingting said to Qin Feng: "If there is a spear, there is a shield, don't look at how powerful they say, but there must be a way to deal with it, maybe, there is a special radar to search for this stealth aircraft?" ”

Yes, you can contact Xiaoxue, I haven't been in touch with Xiaoxue for a long time after thinking about it, Xiaoxue's marriage, the wedding was very simple, and Qin Feng didn't care about the past, this is just to ask his sister, how is he doing after getting married, that Zhiqiang, if he dares to bully his sister, he will drive a flying leopard to beat him!

Thinking of this, Qin Feng was finally relieved.

The next day, it was estimated that the other party was at work, Qin Feng called, who knew that when the call passed, my sister was no longer on the ground, and followed the experimental plane and went to the sky again!

Recently, my sister has been flying in the sky for a long time, even higher than Qin Feng, which also shows that the research and development of their radar has reached a critical point.

In the process of test flight, a large number of problems will be exposed, and if these problems are solved, it will be a qualified airborne radar.

I had no choice but to wait, and in the afternoon, finally, someone was found, and they had already returned from a test flight.

"Brother!" When I received the call, there was a happy cry from the other side: "Why do you have time to call me!" ”

"Yes, I have time to talk to you recently." Qin Feng asked a few words, and then turned to his topic: "Recently, the Americans' stealth aircraft have caused a lot of trouble, you are engaged in radar, do you have a plan?" Isn't that kind of plane impossible to find? ”

"Of course not." The voice from the other side of the phone was very simple: "Complete stealth does not exist, its so-called stealth is nothing more than low detectability, that is, its equivalent radar reflection area is very small, so there is still a way to find it." ”

"What's the solution?" Qin Feng asked anxiously, in fact, Qin Feng didn't know why he was so concerned, it was said that this had absolutely nothing to do with him, but Qin Feng just valued this.

"Its stealth band,It's a micro ** segment,In front of our meter-wave radar,Yes,It's the kind of electromagnetic wave that made some TV antennas for our dad last time in our house,The stealth is definitely much worse,Of course,You can also use phased array,Increase the radiation intensity,Determine its location。

When he said this, there was a greeting from someone over there, so Xiaoxue said to Qin Feng: "I'm going to study today's data, I'll hang up, let's talk later." ”

After saying that, I hung up the phone over there, it seems that my sister is very busy, a college graduate, after entering, there is such a job, in fact, it is already very good, she is studying, it must be a key project.

Qin Feng thought to himself in his heart.

Putting down the phone, he remembered again the two ways that his sister said, in fact, he didn't know that when this kind of stealth aircraft came out, the radar department held a discussion, and these two ways were proposed by his sister, and now she has more and more of a project leadership ability.

After all, the shorter the wavelength of the radar, the closer it is to a straight line, such as a long wave, which propagates around the surface of the earth, and walks in an arc, and when it comes to short waves, it is very direct, the shorter the wavelength, the more accurate the position of the detected object, which is also the development direction of all radars now.

Domestic radar, originally inherited from the Soviet system, long-range early warning radar, there are a lot of meter-wave radar, however, the accuracy of this radar is very poor, most of the time, is to tell the radar hand, there is a target, that's all, the height of the target, speed, specific location, are not clear, the error may be several kilometers, can not meet the needs of guiding missiles at all, can only guide fighters up, visually looking for targets.

As for this phased array radar, it is even more evil, the antenna of this radar does not rotate, relying on changing the phase of the radar wave to achieve detection in different directions, and there are also dabbles in China, especially the large long-range early warning radar that does not move on the ground, in fact, the main business of the 14 institutes is to engage in ground warning radar, and they have the results of this phased array radar, but they are all passive, the kind of active phased array radar that relies on small T/R components one by one, can not be made in China, This requires high-precision processing technology.

Of course, this is only a theoretical study, after all, it is still too early to talk about this, and the 14 Institute has devoted all its energy to the development of airborne pulse Doppler radar, and absolutely has no energy to carry out any basic research on anti-stealth aircraft.

After putting down the phone, Qin Feng was also reassured, and just when he was about to continue his work, he saw Chen Lao coming over.

Qin Feng himself flew over directly in the Jian-7, but the other people, including the ground crew, various equipment for ground maintenance, and the designers of the aircraft, etc., all drove over, and they drove ten old Jiefang, and they came over in a flickering manner, and they arrived this morning.

I thought they would rest, but after they came, they began to work, and Chen Lao must have shouted that he would go to work.

"I heard that you have been looking at some stealth machine information in the past two days." Chen Lao said: "Comrade Qin Feng, your forward-looking, really let us admire, let me tell you a more interesting, in fact, stealth is too attractive for aircraft designers, but what, different countries, different routes, the West is from reducing the radar reflection area, this normal scheme to start, and the Soviet Union, is to find another way, decided to engage in plasma stealth technology, this does not need to destroy any aerodynamic shape." ”

If you talk about the specific content, this must be top secret, but when engaging in basic research, no matter what the technical leaders of any country, they all like to publish academic papers, which is called academic borderlessness, and if you don't release it first, wait until others release it, isn't this achievement someone else's?