The military-industrial scientific research system of the academic master.

Chang Haonan's answer just now and Guo Lin's subsequent reaction triggered good-natured laughter from everyone, including Xu Yang.

However, the discussion quickly returned to the topic related to the jamming pod.

"Gong Guo, where is your research on that pod now?"

Chang Haonan asked a question that he and Xu Yang were both concerned about.

"It has just begun. There is no progress yet. Even the restoration is only half done."

Guo Lin, who was talking about business, also put on a relatively serious expression:

"Although the MiG-25 that was shot down had an average height and speed and was more than completely smashed, it happened to crash on a ridge in the Ladakh Mountains, causing the wreckage of the aircraft, and of course the pod, to be distributed separately. In the three valleys, the situation on the Pakistani side was more complicated, and we did not dare to mobilize too many unreliable troops to search the mountains, so it took a long time to find most of the key parts."

"At present, we can only analyze the situation reported by the combatants during the operation. Let's not mention the function of radar reconnaissance. In the electronic interference part, it is certain that there is at least one relatively powerful velocity gate drag interference, and more parts need to be Waiting for the disassembly results to come out.”

"I don't think it's the only function."

Xu Yang lowered his head and thought for a moment, then replied:

"Although I don't know much about military radars, current pulse Doppler radars should all have the ability to measure distance and speed at the same time. As long as the relationship between distance and speed integral is used, it can fight against separate speed drag interference. As for the two J-8Cs being troubled for so long."

Chang Haonan, who has more than 20 years of experience than everyone present, knows more about this:

"Tow interference is generally combined with false Doppler frequency shift interference and Doppler frequency shift flicker interference, which are frequency-shift interference functions that are specifically designed for PD radar coherent accumulation technology, so that the radar speed tracking wave gate is between the two interference frequencies. The real target speed and displacement cannot be stably captured, and the interference effect cannot be overcome by comparing the integrated data alone.”

"But if so..."

Chang Haonan's explanation did not completely eliminate Xu Yang's doubts:

"I'm afraid that the pod must be very large, and the power consumption must be quite alarming. Whether it is using a traveling wave tube phase-shifting amplifier or a CNC phase shifter to achieve carrier frequency shifting, it is inevitable that the harmonic level will If it is too high, the effective interference power will be reduced. In addition, miniaturization of these two things is currently relatively difficult.”

Guo Lin shook his head:

"It is indeed not small, but most of the space is used to accommodate a synthetic aperture radar antenna, and the space used for electronic jamming equipment is not large."

At this time, Chang Haonan noticed that there were many people outside the conference room. It was obvious that the big boss who entered the room at the end was about to come forward, so he quickly made a brief summary:

"Anyway, what Researcher Xu just said makes sense, so our core goal in studying this trophy should be to understand how it can effectively interfere with PD radar, and try to imitate and improve it. It is best to equip it. On our own aircraft, the 8kW power supply of the two engines of the J-36C is still more than half idle."

In fact, Chang Haonan already had some guesses about this pod after hearing Guo Lin's description.

The incident of shooting down the MiG-25 was one of the butterfly effects brought about by his rebirth. There is no previous experience for reference, but the effect of this jamming pod sounds very close to that often hung on the wingtips of the Su-27. Those two L005S active electronic countermeasures systems.

L005S is quite compact and consumes little power, but it has always had good results even until the beginning of the 21st century. The key is that it does not use traditional traveling wave tube amplifiers or numerically controlled phase shifters, but uses digital The radio frequency memory (DRFM) implements direct digital synthesis (DDS) to complete digital frequency shifting.

Yes, Big Brother was already able to produce components such as DRFM and FPGA in the mid-80s. It was basically only behind the United States and did not rely on black magic to achieve electronic warfare capabilities.

And what's more abstract is that while the Su-27's flight control was still using analog telex, its supporting jammer had already been fully digitalized.

Of course, it has been 005 years since the L10S was finalized, and the United States is still the super devil in the field of semiconductors. There must be other black technologies in that pod, but the basic principles may not change much.

Because in the previous life until Chang Haonan was reborn, the deception and interference of radar was still in principle.

It’s just that the level of algorithms and components has improved.

It's just that Chang Haonan can only think about these things in his heart.

At this time in the current timeline, he has never even seen the L27S pod on the Su-005 (the two aircraft at the air show did not have it), so it would be too fake to directly reveal their principles...

At this time, a piece of exciting music suddenly played in the conference room.

"Moments of Glory".

Often used as background music for various celebrations or ceremonies.

Sure enough, a staff member soon reminded the attendees to return to their seats and the ceremony was about to begin.

The group of people who were still unfinished had to separate temporarily.

However, according to the agenda, the leader’s speech and awards ceremony will not be very long, and there will be a dinner at the end, so there is still a chance.

According to the previously assigned seats, Chang Haonan and Xu Yang were actually next to each other, and both were in very forward positions.

But it makes sense when you think about it. They were almost the only two people in the audience who were not members of the military, nor of "other" units of state-owned enterprises such as the aviation industry or electronic technology group.

"In fact, that paper is quite influential in the control academic community around the world."

Xu Yang, who was wearing high heels, followed Chang Haonan and whispered to him.

"How to say?"

The two of them found their seats and sat down while communicating in a voice that only the other party could hear.

"After the paper was published, my supervisor when I was studying in the United States contacted me directly and asked me if I was interested in teaching at Berkeley. It would be best if I could bring another author with me."

Xu Yang's words almost scared Chang Haonan who had just sat down.

For a moment, he even wondered if the other party was sent by someone to instigate rebellion.

But the idea was quickly dismissed.

Even if he wanted to instigate rebellion, it would be too stupid in this situation, and Xu Yang didn't offer any very attractive bargaining chips.

Not like.

"So you refused?"

Chang Haonan asked while maintaining a calm tone.

Sure enough, Xu Yang nodded:

"Of course, otherwise I wouldn't have had the chance to come here."

"Originally, the conditions he offered were quite good, but after thinking about it, I still feel that I would rather work with you, Dr. Chang..."

Obviously, there is something in this.

But Chang Haonan didn't have time to think about it.

Because all his attention was quickly attracted by the two people who had just walked in and sat in the middle of the podium.

He knew both of them.

Or to be precise, I've seen them all.

in the photo--

Today’s battle is indeed huge!