Chapter 236 Nine-star General and the Father of the Aircraft Carrier
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 also put on a relatively serious expression when talking about business:
"Been Although the MiG-25 that was shot down had an average height and speed and was more than completely shattered, it happened to crash on a ridge in the Ladakh Mountains. As a result, the wreckage of the aircraft, including the pod, was distributed in three places. In the valley, 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 combat. Let alone the function of radar reconnaissance, it is certain that there is at least one relatively high-power velocity gate drag interference in the electronic interference part. More parts have to wait. The disassembly results came out.”
“I think this function is not the only one.”
Xu Yang lowered his head and thought for a moment, and then replied:
"Although I don't know much about military radar, current pulse Doppler radars should have the ability to measure distance and speed at the same time. As long as the distance is used The relationship is equal to the speed points, so it can resist the single speed drag interference and not bother the two J-8Cs for so long."
Has more than twenty years of experience than everyone present. Chang Haonan knows more about this:
“Drag interference is generally combined with false Doppler frequency shift interference and Doppler frequency shift flicker interference, which are specifically designed for PD radar coherent accumulation technology. The frequency shift jamming function allows the radar speed tracking gate to swing between two jamming frequencies, making it impossible to stably capture the real target speed and displacement, so it is impossible to overcome the jamming effect by comparing the integral data alone. ”
“ But if so..."
Chang Haonan's explanation did not completely eliminate Xu Yang's doubts:
"The pod must be very large, and the power consumption must be quite alarming. Whether it uses a traveling wave tube phase-shifting amplifier or a CNC phase shifters that realize carrier frequency shifting will inevitably reduce the effective interference power because the harmonic level is too high. 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 I 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 show up, 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 36kW power supply of the two J-8C engines is still more than half idle.”
In fact, Chang Haonan already knew about this pod after hearing Guo Lin’s description. Some speculation.
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 of the interference pod that is often hung up. The two L005S active electronic countermeasures systems on the Su-27 wingtips.
The L005S is quite compact and consumes little power, but it has always had good results even into the early 21st century. The key is that it does not use traditional traveling wave tube amplifiers or numerically controlled phase shifters. , but uses a digital radio frequency memory (DRFM) to implement 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-1980s. 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 10 years since the L005S 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 principle may not be too big. change.
Because in the previous life until Chang Haonan was reborn, the deception and interference of radar was still in principle.
It is nothing more than 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 L005S pod on the Su-27 (the two aircraft at the air show did not have it). It would be too fake to directly reveal the principles...
< br>At this time, a piece of exciting music suddenly played in the conference room. "Moments of Glory".
Commonly 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 they were both very close to the front.
But it makes sense to think about it. They were almost the only two people in the audience who were not members of the military, nor the aviation industry or the electronic technology group and other state-owned enterprises.
“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 do you say it?"
The two communicated in a voice that only the other party could hear, while finding their own seats and sitting down.
“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 this idea was quickly ruled out.
Even if he wanted to instigate rebellion, it would be too stupid in this situation, and Xu Yang didn't offer any attractive bargaining chips.
Not like that.
“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, in fact, the conditions he offered It’s still 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 carefully.
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 have seen them all.
On the photo——
Today’s battle is indeed huge!
(End of this chapter)