Chapter 824 Anti-aircraft carrier technology 1 (new January, please vote for me)

"can."

Wang Xiaomo answered decisively:

"I should have mentioned to you before that the 14th Institute was developing a shipborne phased array radar a few years ago. The array size was 4 meters by 4 meters. At that time, it was constrained by the structural processing and electromechanical coupling problems of the large-sized box, so it had not been implemented."

Of course Chang Haonan knew that the radar the other party was talking about was Type 346.

The two talked about it when they first met.

"Yes."

He nodded:

"I remember that after the release of TORCH Multiphysics software, when our Torch Group just started to take on computing business, I specifically told the comrades in charge of this area that if there were any project requests from the 14th Institute of Electronic Science and Technology, they could be executed first, but it seems that I never received any."

"Because the 14th Institute later organized a research team and sent people to study with you, and finally solved the design problem of the array."

Wang Xiaomo explained:

"The first prototype of the 346 phased array radar has been installed on the Bi Sheng and is being tested. No structural problems have been found so far, which means that we can still handle a 16 square meter array."

"At present, the gallium arsenide in our second-generation T/R components has a low yield rate, so the second array has been built intermittently for more than a year and is expected to be completed in the second half of this year."

He mentioned before that if a stable import channel could be found or domestic production could be achieved, the 14th Institute hoped to use gallium arsenide-bipolar silicon hybrid components on the 346 radar.

It now seems that localization has been achieved, but not fully realized.

But there's no need to rush this matter.

As long as there are continuous orders, updating and iteration of production technology will be a natural process.

It's like building a phased array antenna.

When planning the KJ-200 a few years ago, Wang Xiaomo said that it would require workers to make it manually using milling cutters.

As a result, not long after, Torch-CB Ferrari Group was established, and its first product, MS45T, solved the urgent problem.

At the end of last year, when Chang Haonan was looking at the financial statements, he found that the China Electronics Technology Group had quietly bought nearly three-digit...

As for the second four-axis linkage model, Dianke is also one of the first launch users.

It's basically a strategic partnership.

……

After chatting about KJ-200 for a while, Chang Haonan saw that the atmosphere was almost the same, so he told the other two about the specific mission of his trip.

"Actually, I was about to ask that."

As a radar expert, Wang Xiaomo is obviously also very interested in this topic:

"This radar target identification you mentioned... shouldn't be as simple as distinguishing between friend and foe, right?"

"Of course."

Chang Haonan said as he took out the prepared documents from his briefcase and handed them over:

"In fact, it's not just radar. My interim goal is to extract and analyze the signal features captured by multiple sensors to specifically determine the nature of the target."

“For example, if the radar detects an echo with a speed of tens of kilometers per hour, is it a flock of birds or a slow-flying helicopter?”

"Or if a very blurry image is taken in the visible light band, could it be a house, or just a patch of terrain?"

"Or, if the sonar detects a noise, is it a living creature, ocean background, or a submarine?"

"..."

"Wait a minute, wait a minute..."

Hearing Chang Haonan talking further and further away, Wang Xiaomo quickly reached out to stop him.

Firstly, he was worried that if he continued listening, KJ-200 would change from Little Sweetie to Mrs. Niu in his mind.

Secondly, he suddenly thought of a possibility.

A magical possibility:

"If that's the case, then can we use radar to emit electromagnetic waves to image the target and use that to determine whether it's a specific model of aircraft, or whether the ground target is a tank or a truck?"

This is definitely a feature that all air forces around the world dream of.

Although in theory, friend or foe identification can be accomplished by IFF antenna or data link.

But in actual operation, IFF has a very short range due to its high power and frequency.

Especially under abnormal weather conditions, to exaggerate a little, the effective range is not as good as the killing radius of some air defense missiles with larger warheads.

The data link...

At least in 2000, even the US military could not guarantee that all aircraft in the war zone could be effectively connected to LINK16.

Even if the terminal is installed on the hardware, the data transmission bandwidth will explode.

Therefore, if you want to judge whether a target is a friend or an enemy beyond visual distance, there is actually no particularly reliable method.

But if the technology provided by Chang Haonan can use airborne radar to distinguish the shape of the target.

That’s different—

If you see an F16, how can you not know which side it is from?

This idea made Chang Haonan's eyes light up.

It's just a shame.

After thinking for a moment, he shook his head:

"At least not yet."

"With current technology, the resolution of centimeter-wave and decimeter-wave radars is really not enough. At most, they can tell whether the target is a car or a house. The accuracy of millimeter-wave radars is enough, but the detection distance is not enough, almost the same as visual vision. If synthetic aperture technology is used, the imaging time is too long and high-speed targets cannot be detected..."

"Um……"

Although his idea was rejected, Wang Xiaomo was not discouraged.

After all, Chang Haonan only said that it is not possible now, but he did not say that it is not possible in principle.

It shows that there is a promising future.

At this time, a naval officer accompanying him suddenly interrupted:

"It sounds like... this technology is not suitable for dealing with vehicles or aircraft, but is more suitable for searching for targets at sea..."

"It's hard to say that there's a big difference between a J-8 and an F-16 in the eyes of radar, but an aircraft carrier and an oil tanker, or some other large ship... although the RCS may be similar, the difference in signal characteristics should still be quite obvious due to the existence of a flat deck..."

"!"

"!"

"!"

Before he finished speaking, Chang Haonan, Wang Xiaomo and Liang Shaoxiu turned their heads almost at the same time and looked at the naval lieutenant commander.

The latter was stared at by the three people, and suddenly felt a little scalp tingling, and his momentum weakened immediately:

"Well, I was just saying it casually..."

"Do not."

Chang Haonan raised his hand:

"This is not just a casual remark."

"This is not just a casual remark."

He and Wang Xiaomo said in unison.

However, the two people were thinking different things at this time.

Wang Xiaomo thinks that this technology may be more suitable for use in anti-submarine/patrol aircraft to track and monitor enemy fleets at a safe distance, and to find the signal characteristics of hulls, snorkels or periscopes in complex waters.

And Chang Haonan's idea is——

In the many rumors about the specific guidance methods of anti-ship ballistic missiles in the past, there seems to be a similar technical route.

Although many years ago, in anti-ship missiles, "picking the one with the largest RCS and hitting it" has become the first principle in the target search process.

However, with the continuous development of ship low RCS technology and the equipment of various radar reflective decoys, this simple and crude method has become somewhat outdated.

Compared with the loss of targets, the more troublesome problem lies in some civilian ships - such as fishing boats. Although they may not be large in size, due to their appearance, they often have an RCS that far exceeds the displacement standard, making it easy for anti-ship missiles to hit the vicinity of the target, or even the bystanders on the route.

Ordinary anti-ship missiles that win by quantity are fine. At most, you can fire a few more missiles, or you might originally want to attack an aircraft carrier but end up hitting the destroyer next to it. That's not a loss.

However, each anti-ship ballistic missile, and even anti-ship hypersonic missile, is extremely expensive and obviously cannot withstand such consumption.

Therefore, a method is needed to distinguish high-value targets from the field of vision.

As the officer just said, flat-deck aircraft carriers and amphibious assault ships are the two most valuable targets, and their signal characteristics happen to be very special...