Chapter 338 City Gate Tower and Hip Bone Axis
Huh?
The next step is the technical details. Can you give me some advice? This was something Ye Gong never expected.
You don’t understand. Ah, believe you, my surname is not Ye!
In fact, in technical meetings held in the next few decades, whenever someone says something like "I don't understand this aspect, but", the party being reviewed or the designer will definitely be alarmed, and they will immediately One hundred and twenty precautions are mentioned to deal with it.
Maybe this person really doesn't understand this aspect, but the problems he finds in this aspect are very likely to be able to kill this book in one go.
The reason is that since you don’t understand it yet you still dare to say it, it means that this problem is really big, and do people really don’t understand it? Guess what.
However, Ye Gong couldn't care less about this at this time. Judging from the previous communication, if Mr. Gao said that he could make suggestions, then he would definitely make them, and most of them would be effective.
“I would like to hear advice.”
Gao Zhendong drew three coordinate systems on the paper, with an f on the horizontal axis and a p on the vertical axis.
Oh, it seems that Chief Engineer Gao has three methods, related to electromagnetic waves, f frequency and p power. Regarding Gao Zhendong's habits, Ye Gong has also gained a little knowledge.
Gao Zhendong continues to draw on the picture.
“As for the suppression mode, in my opinion, there are three technologies, one is full-frequency blocking, the other is precision suppression, and the third is sweep frequency suppression. Ye Gong can decide on his own.”
Gao Zhendong introduced the three technologies.
Full-frequency blocking means to interfere with the entire band, suppressing a large area without worrying about any fish slipping through the net.
Precise suppression is based on the specific frequency used by the enemy, and only suppresses this frequency.
Sweeping frequency suppression is a combination of the two. It only interferes with a certain frequency point, but this frequency point continuously scans and swims in the entire working frequency band. This technology is further improved by frequency hopping suppression, as needed. , only jumps on a few possible frequency points and does not scan them all.
Although it sounds simple, our scientific research was like this at that time. Many technologies that would seem to people in the future to have very simple principles were just unimaginable and could not even be implemented. Simply put, I just can’t think of going in that direction because my theoretical foundation is too poor.
Ye Gong didn’t expect that Gao Zhendong had already gone into the technical details to this extent. This time, he didn’t have to think about it himself, just copy it, because he had already thought about everything he should think about. The principle is quite simple, but People are already thinking ahead.
"General Engineer Gao, you have finally completed the journey of suppressing interference. Thank you very much."
Thinking it was a training exercise, he pointed to a person he brought with him: "Tell me, what are your considerations for these three methods?"
The person who was pointed thought for a while: "I I think full-frequency blocking is better, with wide coverage, which makes the enemy's radar useless."
Ye Gong frowned: "Then why did Chief Engineer Gao propose two technologies: precision and frequency scanning. Come? ”
Yes, it has wide coverage, but what’s the price?
The person thought for a moment: "Afraid that the technology is not enough to cover such a wide frequency band?"
I said this a little nervously, and I always felt that it should be like this, but looking at Mr. Ye's expression, I felt that this was not the case.
Looking at Chief Engineer Gao again, he had a smile on his face and said nothing, and he felt even more unsure. This Chief Engineer Gao looked younger than me, how could he know so much?
Ye Gong shook his head and changed to another person: "What do you think?"
"I think the same as him."
"Hey, it saves trouble. Son." Ye Gong shook his head, next.
After all, they are all the backbones. With the first few people as buffers, the next one can basically be thought of.
"Mr. Ye, Mr. Gao, I wonder, is it because of the power?"
The biggest problem with full-frequency blocking is that it has to be taken care of everywhere, but the transmission power is only so high. The wider the frequency band to be blocked, the smaller the energy allocated to a certain frequency. As a result, the enemy signal may not be blocked and the effect will be ineffective.
After all, one is flooding with water, and the other is using good steel on the blade. The effects at specific frequencies are naturally different.
Precision suppression and frequency sweep suppression are much better in this regard, but frequency sweep suppression has a window period problem, but frequency hopping does not have this problem. In short, technology is evolving in a spiral.
"Well, that's pretty much it." Ye Gong nodded with satisfaction, finally not losing his face.
Gao Zhendong added: "In addition, there are some benefits, such as electromagnetic compatibility."
Electromagnetic compatibility? This is a new thing, and Ye Gong's ears immediately stood up: "Mr. Gao, I would like to hear the details."
These days, the electromagnetic environment is not that complicated, so naturally this issue cannot be considered.
Speaking of electromagnetic compatibility, John Bull Sheffield has something to say: Don’t cue!
Gao Zhendong explained the concept of electromagnetic compatibility, and then said: "It can only work at the necessary frequencies, and it can also reduce the interference of the electronic warfare system on one's own radar to a certain extent, ensure the working efficiency of other systems, and reduce the electromagnetic compatibility layout. and the difficulty of design. "Write it down and learn it again. Ye Gong's writing is as fast as flying. Just these few sentences may be a detour for several months.
Even this has nothing to do with electronic countermeasures itself. As long as radars are used, and more and more radars are used, electromagnetic compatibility cannot be avoided. The sooner you realize this problem, the less trouble there is in the design process.
"In the opinion of Mr. Gao, which one of the three modes of this electronic warfare system is more suitable to start first?"
I lay down and asked directly.
Gao Zhendong said with a smile: "The best one is definitely frequency hopping, but if frequency hopping is realized, then the other ones are basically just a matter of pressing a switch. My suggestion is to do full-frequency blocking first." , and then slowly study the frequency hopping according to the technical conditions. Whichever one comes out first will be added. These technologies are not an either-or relationship, but can coexist with each other and be switched as needed, especially if you are using it. It would be more convenient if the computer serves as the control core. "
Children only make choices, adults want them all.
However, Gao Zhendong still gave a reminder: "Don't underestimate full-frequency blocking. When the enemy uses frequency hopping radar, other methods may cause problems. At this time, it can really be used. We can only rely on our own high power and use full-frequency blocking. ”
With frequency hopping radar, the operating frequency of the radar is not fixed and will actively jump and change within a certain range.
Precision suppression and frequency hopping suppression both rely on the recognition of enemy radar signals. When the enemy frequency hops, if the recognition speed or accuracy cannot keep up, the effect will not be good.
Although frequency sweep suppression does not require identification of enemy signals, this is even less guaranteed. After all, the enemy will not cooperate with your frequency sweep to jump frequencies. He will jump wherever you sweep.
As for the further evolution of frequency hopping radar - LPI (low probability of interception) radar, Gao Zhendong did not mention it. This thing is still early, and it is meaningless to consider it now. On the contrary, it interferes with the normal research work.
Ye Gong's thinking was obviously not limited to electronic interference. Following Gao Zhendong's words, he discovered another interesting direction.
——Frequency hopping radar, I understand, we can consider frequency hopping radar.
Of course Gao Zhendong didn’t know that he was talking about the city gate building, while Ye Gong was thinking about the hip axis.
He ended the issue of active interference and started introducing passive interference.
"Passive interference, I consider two main methods, one is chaff interference cloud, the other is inflatable corner reflector."
The corner reflector is easy to understand, chaff What is an interference cloud?
Gao Zhendong introduced the chaff interference cloud again. When Ye Gong heard it, he thought this thing was good.
The technology is simple. Aluminized plastic foil cannot be said to be easy to build, but at least it is not difficult. The rest is essentially a rocket launcher that can be equipped with a timing fuse.
There is no need to make major changes to the hull. The simplest modification only requires adding a transmitter, connecting it to a line, and installing a launch controller.
The cost is low. Putting aside ammunition, how high can the cost of a rocket launcher be?
And it can be installed not only on large ships, but also on small boats. It can be said that the cost is low and the results are quick. It can immediately greatly improve the survivability of all ships in the existing combat environment.
These methods can interfere with not only the radar on enemy missiles, but also search radars, fire control radars, and artillery sighting radars.
Do it, do it quickly! Pretend, pretend it all for me!
Not surprisingly, Ye Gong's thoughts flew away again.
Gao Zhendong also introduced him to both combat styles of chaff jamming.
"Ye Gong, chaff interference can use two styles, dilution interference and center of mass interference. The former is used in the enemy search phase, and the latter is used in the tracking phase."
"Also What's the difference?" If the previous ones can be understood, then these two styles are completely confused, because they have not entered this field at all, so they naturally have no idea.
“Well, dilution interference means that when the enemy is searching, multiple reflection sources are formed, allowing the opponent to track false targets during the search phase, diluting the probability of being tracked, so it is called dilution interference.”
"The center of mass interference is to use the chaff cloud to offset the energy center of mass formed by it and one's own after it has been locked, allowing the opponent to track this center of mass. At the same time, one's own side maneuvers at high speed perpendicular to the direction of the enemy's attack, increasing the distance between the center of mass and the center of mass of the enemy. "
His~~~~~~
After listening to Gao Zhendong's detailed and penetrating explanation, Ye Gong felt a bit toothache.
This is no longer a technique, this is a tactical method.
He even thought that Gao Zhendong had already built this thing and conducted experiments, so that he could speak so logically, vividly and logically.
Otherwise, there is no way to explain it. If he made a series of interlocking and progressive suggestions on principles, methods, styles, and techniques when it comes to active interference, it can all be imagined from the perspectives of theory, principle, and technology.
The tactical method of diluting interference and center-of-mass interference is really difficult to explain technically.
However, maybe, this has something to do with technology, can you imagine it out of thin air?
Mr. Gao is an abnormal person! genius! That's the only way to explain it.
(End of this chapter)