"I remember, in the hands of the 14th Institute of the Electric Technology Group, there should be a sea-based phased array radar project, right?"

After the topic came to the air defense of surface ships, Yang Shuyu asked Guo Lin and others.

With his status, he naturally knows the existence of these projects, but he may not be very clear about the specific progress.

Unless it is a key model in its own field of responsibility.

Guo Lin obviously didn't expect the electric technology group he represented to be mentioned so suddenly, so he was stunned for a moment, but he quickly nodded:

"That's right, we call this radar the Star of the Sea, the specific model is tentatively set as 346 type, but it is still in the process of transitioning from technical pre-research to officially starting the project, it should be in charge of Director Zhou Wanxing, I probably know that the technical route determined now is active phased array, T/R components use bipolar silicon components, if the future can be domestically produced, or seek a stable channel to import gallium arsenide, then you can switch to gallium arsenide-bipolar silicon hybrid devices."

Sea Star is considered the No. 1 project in the current 14 institutes, and Guo Lin has also done work such as determining technical indicators, so although he is not involved now, he still knows some approximate parameters.

"What about the number of T/R components?"

Although the Huaxia Navy does not yet have a phased array radar, it is clear that there are already naval officers who are ahead of the equipment, at least with some understanding of the relevant basics.

Of course, for a professional like Guo Lin, such a question is still too general and not easy to answer, so he bowed his head and organized the language for a while before he spoke again:

"It's too early to discuss the number of T/R components, and it's not too important, because first of all, we have to determine the specific size of the radar array according to the ship design given by the shipbuilding industry, which involves your Navy's overall plan for future air defense destroyers, and the potential of a ship of 5,000 tons and a ship of 8,000 tons is obviously different in this regard."

"If it is estimated according to the average value of a single array of 4*4 meters square, then the number of modules can be about 3,500-4,000 when using bipolar silicon, and after upgrading to gallium arsenide-bipolar silicon hybrid devices, it should be able to increase to about 5,000."

Due to the difficulties in engineering practice such as packaging, heat dissipation, and electromagnetic shielding, when the area of the radar array increases to a certain extent, it is difficult for the number of T/R components to grow synchronously with the size of the array, so the array of more than 5 square meters above the air police 200 can be stuffed with nearly 2,000 components, and the 16 square meters of the 346 here is only twice as much.

Of course, there are also factors that the working environment of airborne radar is more conducive to heat dissipation, in short, it is not a simple mathematical problem.

"Then this radar should be relatively advanced in terms of technical level?"

Yang Shuyu still has a good understanding of foreign military equipment, especially since 1994, Lockheed Martin began to put the Navy's advanced distributed combat system (DANCS) developed on the basis of Aegis baseline 5.3 into export, although it is impossible to sell it to non-allies, but it still discloses a lot of basic parameters, which can be regarded as giving Huaxia a conceptual understanding of regional air defense ships.

"In terms of the overall performance determined before, it is at least at the same level as the baseline 7 version of Aegis that is also being developed in the United States, mainly because of the research and development level of our semiconductor components, as well as the gap in the performance of data processing computer chips, which flattens the advantages of active phased array over passive array in terms of mechanism."

Although Guo Lin's tone still has some regret in it, it is from the perspective of an engineer, and it is difficult to reconcile the inability to turn technical advantages into performance advantages.

However, for these naval officers here......

This TM is simply a joy from the sky!

Huaxia's latest cutting-edge warship, the Daocheng, which was commissioned only last year, is only in terms of air defense capability...... It is even slightly inferior to the second batch of Charles Adams class after ship 14.

And the latter are ships that entered service in the mid-60s.

As a result, now someone suddenly said that he was rubbing a set of air defense systems on his side, and he could wrestle with the new version of Arleigh Burke in the future.

There is a sense of déjà vu that a poor boy of twenty years suddenly learns that he is the only illegitimate child of a rich man.

"So...... Engineer Guo, I don't know when this Sea Star system is expected to be finalized and put into service, or at least a prototype will be built? ”

The person who asked the question this time obviously didn't know these details before, so even his voice trembled with excitement.

"According to the plan at the time of the project, it will be finalized in about 10 years."

Guo Lin's answer was without thinking, but then he looked up at Chang Haonan, who was sitting opposite, and hesitated:

"If you estimate it according to a more optimistic situation, it will probably ...... It can also be shortened by a few years. ”

In fact, just thinking back to all kinds of things that have happened since he met Chang Haonan, Guo Lin's feeling is that if this thing can be used by the other party to participate, it is conservatively estimated that it will be able to be won in four or five years.

This time is mainly because the comprehensive test ship that is going to be used for testing is still in the shipyard and I don't know when it will be delivered, and the time required for the intermediate modification, prototype manufacturing and other processes cannot be compressed, otherwise I am afraid it will be shorter.

But thinking about it, it is impossible for him to overstep his responsibilities and make this decision for Chang Haonan, after all, the latter now seems to be incompetent, and he is a person in the aviation industry system, and it is impossible for him to abandon his job and devote himself to the great cause of electronics and ships......

"Ten years......"

Although intellectually speaking, this time should be quite reasonable, after all, it took the United States 12 years to develop Aegis, but after all, it has just drawn an almost perfect flatbread, and now it is learned that even the wheat used to make the cake has not been grown, and it will take 10 years to eat it, so there will be some loss.

Even Yang Shuyu felt this way.

So he asked a little unwillingly:

"Then if we lower some technical requirements, such as using passive phased array antennas for the time being, is it possible to shorten some research and development time and let the troops have something to use first?"

This idea is basically to run in small steps, and everyone here is familiar with it.

However, Guo Lin shook his head directly after hearing it:

"No, in fact, although the active array is more advanced than the passive array, but the two are technically two branches in different directions, not on the same line, our electrical technology group in the field of electrical scanning from the beginning of the active array in the direction, if you go back to the passive array now, it will disperse the research and development force."

"And the biggest problem facing the sea star now is not actually on the active array, but some more basic parts, such as the most basic, the antenna array structure needs a composite box, the internal use of aluminum honeycomb sandwich panel and aluminum alloy diaphragm, to separate thousands of honeycomb-shaped diamond-shaped space for the T/R components, between the composite materials and aluminum alloy parts to use large-diameter aluminum alloy fasteners riveting, and these processes we can't complete any of them now."

"Another example is the reflective panel of the antenna array, which is the benchmark of the entire phased array radar structure, and the manufacture of this thing requires a 4 m * 4 m aluminum alloy billet, the current scheme can only be imported from the Samara aluminum plant, but the number of RUSAL is different from the US alco mark we used to use in the past, and its mechanical properties must be re-estimated, or you can also use two domestic 4 m * 2 m δ70 aluminum plate tailored welding, but the welding requirements are not up to standard......"

Even if it was just listening to Guo Lin describe these problems, all the officers present said that they had big heads.

Obviously, the engineering problems involved are far more complex than ordinary people think, and they are by no means something that can be done by working overtime in a short period of time.

Wang Xiaomo and Chang Haonan talked about the design plan of the early warning aircraft before, and said that at present, the high-silicon aluminum alloy required for the phased array radar array can only be processed by manual milling in China, and the processing efficiency and yield rate are average, which is barely satisfactory for the balance beam or wedge-tail antenna.

Now the square antenna area of the 346 radar is at least three times that of the Air Police 200, and then a ship will have 4 sides......

I'm afraid it's not enough to work by hand alone.

In fact, what Guo Lin did not say was that these processing problems could only be regarded as relatively less complex among the difficulties faced by the Sea Star project.

The more troublesome part is the design.

However, those contents are more professional and profound, and even if they are spoken, few people present should be able to understand them.

And judging from Yang Shuyu's expression, what he just said has had a good enough effect, and there is no need to continue to talk at length.

So forget it.

Today's protagonists are, after all, comrades from the navy.

(End of chapter)