Chapter 338 City Gate Tower and Hip Axis

Ok?
Further down the page are the technical details. You can even give suggestions on this? This was something Ye Gong had never expected.

Your “ignorance”. Bah, believe me, my last name is not Ye!
In fact, in the next few decades, when someone says something like "I don't understand this, but" in technical meetings, the party being reviewed or the designer will definitely be alarmed and will immediately be extremely cautious.

Maybe this person really doesn't understand this aspect, but the problems he found in this area are very likely to nail down this book in one go.

As for the reason, since they don’t understand it yet dare to speak it out, it shows that this problem is really big. And do they really not understand it? Guess it.

However, Engineer Ye had no time to care 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 they would most likely be effective.

"I'd like to hear from you."

Gao Zhendong drew three coordinate systems on paper, with f written on the horizontal axis and p written on the vertical axis.

Oh, it seems that Chief Engineer Gao has three methods that are related to electromagnetic waves, f frequency and p power. As for Gao Zhendong's habits, Engineer Ye has also figured out a little bit.

Gao Zhendong continued to paint on the picture.

"As for the suppression mode, I think there are three techniques: full-frequency blocking, precise suppression, and sweep frequency suppression. Engineer Ye can use your discretion."

Gao Zhendong introduced the three technologies.

Full-frequency blocking means interfering with the entire band, suppressing a large area at a time without worrying about any fish slipping through the net.

Precision suppression is based on the specific frequency used by the enemy, and only suppresses this frequency.

Sweep frequency suppression is a combination of the two. It only interferes with a certain frequency point, but this frequency point keeps scanning and moving in the entire working frequency band. This technology is further called frequency hopping suppression. According to needs, it only jumps on a few possible frequency points instead of scanning all of them.

Although it sounds simple, our scientific research was like this at that time. Many technologies that seem simple in principle to people in the future were unthinkable, or even impossible to achieve. It was simply because we couldn't think of that direction because the theoretical foundation was too poor.

Engineer Ye didn't expect that Gao Zhendong had already gone into such depth in the technical details. This time he didn't have to think about it himself. He could just copy it because Gao Zhendong had already thought of everything he needed to think about. The principle was quite simple, but Gao Zhendong had already thought of it ahead of him.

"Chief Engineer Gao, you have completed the process of suppressing interference. Thank you so much."

Just as a training exercise, he pointed to a man he had brought with him and said, "Tell me, what are your thoughts on these three methods?"

The person who was called thought for a moment and said, "I think full-band blocking is better. It has a wide coverage area and can render the enemy's radar useless."

Engineer Ye frowned: "Then why did Chief Engineer Gao propose the two technologies of precision and frequency sweeping?"

Yes, it has wide coverage, but what is the cost?

The man thought about it and said, "Are you worried that the technology is not good enough to cover such a wide frequency band?"

I said this with a bit of trepidation. I always felt that this should be the case, but looking at Mr. Ye's expression, I felt that it didn't seem to be the case.

Looking at Chief Engineer Gao again, who was smiling but not saying anything, I felt even more unsure. This Chief Engineer Gao looked younger than me, so how could he know so much?
Ye Gong shook his head and asked someone else: "What do you think?"

"I think the same as him."

"Tsk, you save yourself the trouble." Engineer Ye shook his head and went to the next one.

After all, those who came here are backbones. With the previous few people as a buffer, we can basically have an idea of ​​the next one.

"Boss Ye, Boss Gao, I wonder if it's because of the power?"

The biggest problem with full-band blocking is that everything has to be taken care of, but the transmission power is limited. The wider the frequency band to be blocked, the smaller the energy allocated to a certain frequency. In this way, it is possible that the enemy signal cannot be covered and no effect will be achieved.

After all, one is flooding, and the other is using good steel on the blade, so the effects at specific frequencies are naturally different.

Precision suppression and swept frequency suppression are much better in this regard, except that swept frequency 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 good enough." Engineer Ye nodded with satisfaction. Finally, he did not lose face at all.

Gao Zhendong added: "In addition, there are some benefits, such as electromagnetic compatibility issues."

Electromagnetic compatibility? This is a new thing. Engineer Ye's ears immediately pricked up: "Mr. Gao, I'd like to hear more about it."

These days, the electromagnetic environment is not that complicated, so this issue is naturally not taken into consideration.

When it comes to electromagnetic compatibility, John Bull Sheffield has something to say: Don’t cue!

Gao Zhendong explained the concept of electromagnetic compatibility before saying: "It can only work at the necessary frequency points, and can also reduce the interference of the electronic warfare system to its own radar to a certain extent, ensure the working efficiency of other systems, and reduce the difficulty of electromagnetic compatibility layout and design." Write it down, write it down, and learn it again. Engineer Ye writes very quickly. Just these few sentences may be a detour of several months.

This doesn't even have anything to do with electronic warfare itself. As long as radars are used, and more and more radars are used, the electromagnetic compatibility issue cannot be avoided. The sooner this problem is realized, the less trouble there will be in the design process.

"Then in Mr. Gao's opinion, which of the three modes of this electronic warfare system is more suitable to be developed first?"

Lie down and ask directly.

Gao Zhendong smiled and said, "The best one is definitely frequency hopping. But if frequency hopping is realized, then the other methods are basically just a matter of pressing a switch. My suggestion is to start with full-frequency blocking, and then slowly study frequency hopping based on technical conditions. Whichever one comes out first, then add it. These technologies are not mutually exclusive, but can coexist and switch as needed. Especially since you are using a computer as the control core, it will be even more convenient."

Only children make choices; adults want them all.

However, Gao Zhendong still reminded: "Don't underestimate full-frequency blocking. When the enemy uses frequency-hopping radar, other methods may have problems. At this time, the only thing you can use is to rely on your own high power and use full-frequency blocking."

Frequency hopping radar, the radar operating frequency is not fixed, it 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 hops frequency, if the recognition speed or accuracy cannot keep up, the effect will not be very good.

Although frequency sweep suppression does not require identification of enemy signals, this cannot be guaranteed. After all, the enemy will not cooperate with your frequency sweep to hop frequencies. They will hop wherever you sweep.

As for the further evolution of frequency-hopping radar - LPI (low probability of intercept) radar, Gao Zhendong did not mention it. It is still too early for this thing and there is no point in considering it now. Instead, it will interfere with the normal research work.

Engineer Ye's thinking is obviously not limited to electronic interference. Following Gao Zhendong's words, he discovered another interesting direction.

——Frequency-hopping radar. Got it. We can consider developing a frequency-hopping radar.

Gao Zhendong naturally didn't know that he was talking about the city gate tower, and Engineer Ye was thinking about the hip axle.

He finished discussing active interference and began introducing passive interference.

"For passive interference, I think there are two main ways. One is to use foil to interfere with the cloud, and the other is to use an inflatable corner reflector."

Corner reflector is easy to understand, but what is foil interference cloud?
Gao Zhendong introduced the foil interference cloud again, and when Engineer Ye heard it, he thought it was a great thing.

The technology is simple. I can't say that it's an easy task to make aluminum-coated plastic foil, but at least it's not difficult at all. The rest is essentially just a rocket launcher that can be equipped with a time fuse.

No major changes are required to the hull, the simplest modification only requires adding a launcher, connecting a line, and installing a launch controller.

The cost is low. Putting aside the ammunition, how high can the cost of a rocket launcher be?
Moreover, it can be installed not only on large ships but also on small boats. It has low cost and quick effect, and can immediately greatly improve the survivability of all ships in the existing combat environment.

These methods can interfere not only with the radars on enemy missiles, but also with search radars, fire control radars, and gun aiming radars.

Do it, do it quickly! Pretend, pretend!

Not surprisingly, Ye Gong's thoughts took off again.

Gao Zhendong also introduced to him the two combat styles of chaff interference.

"Engineer Ye, there are two types of chaff jamming: dilution jamming and center of mass jamming. The former is used in the enemy search phase, and the latter is used in the tracking phase."

"There is such a difference?" If the previous ones were understandable, then these two styles would be completely confusing, because they have not even entered this field and naturally know nothing about it.

"Well, dilution interference is when the enemy is searching, it creates multiple reflection sources, allowing the enemy to track false targets during the search phase, thus diluting the probability of being tracked, so it is called dilution interference."

"As for the center of mass jamming, after being locked, the chaff cloud is used to offset the energy center of mass formed by the enemy and the enemy, forcing the enemy to track this center of mass. At the same time, the enemy maneuvers at high speed perpendicular to the direction of the enemy's attack to increase the distance between the center of mass and the enemy's missile, thus causing the enemy's missile to miss the target."

Hiss~~~~~~
After listening to Gao Zhendong's detailed and incisive explanation, Engineer Ye felt a little bit of a toothache.

This is no longer a technique, it is a tactic.

He even thought that Gao Zhendong had already made this thing and had done experiments, which was why he could explain it so logically, vividly, and clearly.

Otherwise it cannot be explained. If he proposed a series of interlocking and progressive suggestions from the perspectives of principles, methods, styles and technologies when it comes to active interference, they can all be imagined from the perspectives of theory, principles and technology.

The tactical method of diluting interference and center of mass interference is really difficult to explain in terms of technology.

However, perhaps, this has something to do with technology and can be imagined out of thin air?

Mr. Gao is an anomaly! A genius! That's the only explanation.

(End of this chapter)