Huaxia Research Institute is divided into several types.

The most famous are: Academy of Sciences, Academy of Engineering, Academy of Social Sciences.

A study of science and technology.

A study of engineering technology.

A study of philosophical economics.

They do not belong to each other, and each studies its own.

Among them, the Academy of Sciences and the Academy of Engineering are collectively known as the 'two academies', with thousands of the top researchers in the Chinese scientific community, also known as the cradle of 'academicians'.

Two o'clock in the afternoon.

Professor Xu came to the Academy of Engineering with a thermos cup in his arms, riding on the big red flag that pulled the wind, and amid the roar of the aircraft engine.

The old man who had been waiting for a long time, seeing such a style, secretly had some suspicions, if he raised two more levels to this guy, he was afraid that he would not have to take a plane next time he met.

"Old man, your special car, I have sent it to the Weibei test site."

"With my level, how can I sit in a car of this size, besides, I can't afford it."

"Hongqi Automobile has applied to the official car standard, and the provincial chairman and above can be equipped with a bulletproof version of the big red flag, and according to the honor and meritorious service, the car will be deducted, and you just meet it."

"Really?"

"If I speak, can I still be fake?"

Xu Fei talked with the old man of Wubei, and under the guidance of the guards, he went to the Department of Information and Electronic Engineering.

In fact, the radar communication integration project should have been handed over to the Academy of Sciences, after all, it mainly researches science and technology.

However, the newly established Academy of Engineering, the higher-level departments have paid more attention to it, and in the field of information and electronics, including the mechanical and carrier fields involved in radar, there are more talents here.

After a while, walk into the information center.

The room, which is comparable to a basketball hall, is filled with all kinds of people.

From front to back, the hair color changes from white to gray.

From the inside to the outside, the outfit changed from a white coat to a fully armed green suit.

On the rostrum, in a square vessel in the style of bulletproof glass, two integrated circuit boards with black bodies are placed.

The left side is exquisitely made and the size of a matchbox.

The right side is slightly rough, and the whole thing looks like a wallet.

Undoubtedly, the former is a 'radar module component' left by Strauss, and the latter is a 'replica' made by researchers.

There is also a set of adapters that wrap around various lines, as well as a mini-radar, which appears to be used to test the performance of both.

In fact, parts disassembled from the base module, as long as they are used correctly, within a radius of 50 km from the base, can also be used.

For example, supercapacitors.

At the beginning, I loaded the big red flag and deliberately drove the car to 100 kilometers away from Huangnigang, and the result was no problem at all.

For example, when Lan Dong went out to travel, the accompanying Navy SEALs, through the 'Leopard Commando Armament Suit' that Zhang Shiren obtained, even if they left 1,000 kilometers, it was no problem.

But the control chip of the radar module is different from the two.

It is a highly integrated system that must be within 50 kilometers of the base core and supported by technology to be activated.

In other words, the system is connected to the minimap.

If it is easily imitated, it is estimated that your own faction can create the base core.

Xu Fei thought about it, put down the thermos cup, looked around the audience, called out a translucent page, and decided to start blowing.

But out of the corner of his eye, he glanced at the blackboard with various formulas written on both sides, and then subconsciously turned back and looked at the big blackboard behind him......

1. Doppler effect of mechanical waves: f=f*(1+v/v)/(1-u/v).

As shown in Fig.

High power: rmax=[(4π)2sminptgaeσ]1/4(pr=smin)=[(4π)3sminptg2λ2σ]1/4(g=λ24πae)=[4πλ2sminptae2σ]1/4(g=λ24πae)

As shown in Fig.

2. Amplitude modulated continuous wave signal......

Amplitude Modulated Pulse Signal......

As shown in Fig.

3. Frequency modulation linear frequency modulation (LFM, CHIRP).

As shown in Fig.

3-1, frequency agility.

As shown in Fig.

3-2, phase modulation.

As shown in Fig.

4. High-power electromagnetic oscillation generation and modulation are completed at the same time.

As shown in Fig.

5. Output power......

11. Rectangular amplitude modulation, working ratio 0.01%~1%......

'Oh my damn, what the hell are these talismans?' ’

Xu Fei was stunned for a moment, quickly dragging the translucent page, and was stunned that he couldn't find a matching profile.

That's right!

Strauss has said everything that needs to be said, what am I going to do?

Explain the formula on the blackboard?

But there are no junior high school textbooks or high school textbooks.

Besides, how do you pronounce these letters?

Xu Fei turned around and picked up the thermos cup, "What, grandparents, I'm sorry, I went to the wrong house." ”

Everyone: "......"

"Let's see you later, and everyone is welcome to Huangnigang."

After speaking, he stepped off the rostrum and rushed out of the house quickly.

Seeing this, the old man hurriedly stopped, "You don't say it, do you understand?" ”

"I understand, but I don't know the formula."

“……”

"I mean, I can connect the modules, but let me explain what signal stability, what spectral purity, what actual transmitted signal frequency, aren't you embarrassed for a high school student?"

Xu Fei said, suddenly becoming confident.

Yes, I'm a high school student.

I know a hammer.

The old man must know that this guy doesn't understand, "You connect the modules first." ”

"That's fine."

Xu Fei walked back to the rostrum, picked up the module left by Strauss, and then pulled out many lines and card slots with pins from the adapter.

In fact, he secretly summoned a translucent page to view the main base core left in the hotel suite, which was guarded by 10 engineers, and chose to activate the dismantled radar.

Subsequently, the main base core was recovered again.

This is because, in order to activate the base unit, the base core must be placed.

Now activated, carry the base core with you, and as long as the base unit is within 50 kilometers of itself, it can be used normally.

In addition, the primary base core is different from the huge secondary base core.

As long as the production line is stripped away, the whole becomes smaller.

Looking at the synopsis, it is convenient for the commander to be easily hidden after the defeat.

Of course, when the core of the main base comes to the capital, the base units within the scope of Huangnigang will definitely lose their role.

However, it currently has three secondary base cores, one in the first place, and the other two are not in operation.

Therefore, when Xu Fei came, he left the second one in Huangnigang and authorized engineers to take care of it to avoid the suspension of production of various enterprises.

Meanwhile.

With the lighting of the integrated circuit board indicator, a picture composed of 'circles' appeared on the left projection device.

Due to the absence of a map, the current radar module presents only the most primitive 'visual effect'.

However, it still indicates how many people are in the venue, how many tables there are, and the length, width, and height of the venue.

Xu Fei looked left and right, started the computer that came with the radar module, and connected another projection device.

Two minutes later.

The second curtain outlines a 3D module.

Including the face, figure, edges and corners of clothes, and protruding walls in the venue......

And then with millimeter-level errors, it all keeps plumping it all up.

Unfortunately, they are all gray and white, and there are no other colors.

And because the radar is indoors, the power is small, it cannot penetrate the building, and can only present everything in the venue.

But these features, in this era, are still terrifyingly scary.

If it is used on the battlefield, what thermal imager is needed?

The old man said, "Is there any news?" ”

"Definitely."

Xu Fei started the computer that came with the second radar module, and then connected the third projection device.

Soon.

A group of pictures composed of four angles, including horizontal, frontal, back, and bird's-eye view, appeared in front of everyone.

And there is also a ball in the middle that can adjust the angle, roll it at will, and even pull it into the lens to see a certain academician wiping his glasses......

"Oh my God, this kind of radar, except that it has no color, is almost at the level of high-definition camera."

"No wonder Elder Zhang said that this is not something that should appear in this era."

"No, it's that the transmitting and receiving frequencies are too high, and the performance of the computer is ...... I suspect that beyond the new generation of galactics. ”

"Is overseas science and technology so developed?"

The discussion gradually disappeared, and many academicians, like Weibei researchers, cheered up and decided to catch up after worrying.

After all, if your own faction obtains this level of radar, it means that it is almost invincible in the same field.

Starting so high, what are you afraid of overseas.

Xu Fei was busy, thought about it carefully, dragged the big blackboard, and picked up the chalk, "I remember the TEP database, which once decrypted such a piece of information, saying that the integration of radar communication is only the most basic project, and the next stage should use photon characteristics to constitute optical communication and optical detection." ”

"In other words, the integration of second-generation radar communication belongs to the application of 'visible light' technology."

"It's just that electromagnetic waves are as fast as light, and both will be blocked by haze and thick clouds, so I don't understand what the advantages are for the time being."

"The third-generation radar communication integration, also known as the perception communication system, belongs to the quantum level, just like today's 3D modeling, at that time, it can directly present a color picture, and even divide it into dynamic and predictive dynamic, that is, I can know what you want to do next and respond in advance."

"Of course, the third-generation technology is currently at the theoretical level, and there is no relevant technical support."

After Xu Fei finished speaking, he looked at the old man who was talking to the old man in a low voice, an old man who looked like the person in charge of the engineering academy.

"That's about it, what, can I get into school? If you don't want to be a graduate student, you can give an undergraduate, as you can see, I have a strong practical ability. ”

When the latter heard this, he talked to the old man again, and seemed to understand the meaning of the words, "Xu boy, we are not a school, if you want to go to college, our department can help you apply to the Massachusetts Institute of Technology, and there happens to be a place this year." ”

"Then forget it, leave the quota to the seniors, I will study abroad with my ability!"