Technology: breaking the hegemony that monopolizes the world

"From the information I can find, the Redbud Mountain Laboratory is indeed in an ideal real-world environment, creating the world's highest real-time transmission record for terahertz wireless communication.

Terahertz wireless communication is recognized as the core component of the 6G mobile communication system, and Zijingshan Laboratory has created a real-time transmission architecture that integrates photonic terahertz optical fibers, achieving a single-wavelength net rate of 103.125Gbps and a dual-wavelength net rate of 103.125Gbps. 206.25Gbps terahertz real-time wireless transmission, the communication rate is 10 to 20 times higher than that of 5G.

What is the current state of our laboratory? I think we need to know the data in this area. After all, the commentary on the device is not so intuitive. "

The old man who resigned from Xia Ke Academy is obviously a person who pays attention to practical work and basics.

Although in the scientific research environment of Kyushu Science and Technology, the phenomenon of seniority ranking has long been smashed by Gu Qing, but no matter how some people sitting here break the world, they can't change the fact that they were once the old man's students.

So there was a noticeable pause at this point in the brainstorming session.

Everyone unanimously turned their attention to Yingshu, Li Cun and others who are in charge of the 6G communication g engineering department.

Yingshu and the others felt their shoulders sink after receiving these gazes.

Although they were all people who followed Gu Qing, once everyone reached the professional field, the light in their eyes was extremely eye-catching.

The large screen in the meeting room also intelligently introduced the relevant knowledge of terahertz and terahertz wireless communication, providing a knowledge base for some participants who do not know the details.

Terahertz (THz) is one of the frequency units, indicating the oscillation frequency of electromagnetic waves, T is a quantitative unit, 1THz = 1012Hz, so Terahertz generally refers to electromagnetic waves with a frequency in the range of 0.1~10 THz (wavelength 30μm-3mm). The coincidence of the long-wave band with the millimeter wave and the coincidence of the short-wave band with the infrared light is not only the transition zone from the macroscopic classical theory to the microscopic quantum theory, but also the transition zone from electronics to photonics.

The magic is that the wave band of terahertz wave can cover the characteristic spectrum of substances such as semiconductors, plasmas, organisms and biological macromolecules, so modern science can not only use terahertz (wave) as a diagnostic medium to diagnose many physical and chemical reaction processes, It can also be used as an information wave to realize certain communication requirements.

Yingshu took three deep breaths, and then said: "1G communication is a technology for transmitting information of a few Kbps. After 41 years of development, the current 5G maximum download rate can reach 1Gbps, and 1G is 1048576KB. This speed of progress It can be said to be rapid, and it has been corresponding to the fact that the frequency of the wireless electromagnetic waves we use is also increasing.

Because in theory, the higher the frequency, the larger the bandwidth range allowed to be allocated, and the larger the amount of data that can be transmitted per unit time. The frequency of terahertz waves is 1 to 4 orders of magnitude higher than that of microwaves currently used, and it can provide a wireless transmission rate of more than 10Gbit/s, which is a height that microwaves cannot reach.

Six years ago, the Neon NTT Group announced that it had developed a radio frequency chip in the terahertz frequency band and conducted high-speed data transmission experiments. They claimed that the radio frequency chip allowed the peak rate of the experiment to reach 100 Gbit/s.

In addition to neon, the German Federal Institute of Physics and Technology, Bell Laboratories of the United States, the University of Toronto, Canada, IEMN of France, and Asymatos Communication Systems of the United States have also invested a lot of energy in the research of terahertz technology.

Although our department had relevant research four years ago, it was limited by resource input and semiconductor technology, so it did not make much achievements in the terahertz project. "

boring.

When Ying Shu said these words, it was obvious that the atmosphere in the conference room was a little stagnant.

So many high-ranking elites put aside their complicated scientific research tasks and came here for a meeting, and they started to "dream" without even the foundation?

"But these dilemmas, under the aggressive charge of the semiconductor department, with the encouragement of Mr. Gu and the help of the company's think tank team, finally had some solutions last year.

The wavelength of terahertz is about 30μm-3mm, which is much smaller than the wavelength of microwave and millimeter wave used by 5G, so it can achieve higher precision, and also has high resolution, strong penetrating power and strong anti-interference ability, etc. features.

At present, radio frequency chips in the terahertz frequency band are being developed all over the world. Although the results claimed by Neon NTT Group are very strong, so far, we have not seen a physical device appearing. The academic circles believe that this is another exaggerated speech by Neon ', in order to attract investment and gain attention, and strive for the right to speak.

Everyone should know that the most important thing about RF chips is not the software program, but the chip performance.

Our Kyushu Technology semiconductor department now has the world's top carbon-based chip technology, while Guo Jia, such as Neon, Germany, America, and France, still uses silicon-based chip technology to develop radio frequency chips, which is basically a version behind us. . "

Having said that, Ying Shu naturally adjusted his black-rimmed glasses.

Then he continued: "The terahertz processor including the terahertz radio frequency chip can not only be used in the field of communication engineering, but also can flex its muscles in the full-scene imaging system. , for true perspective shooting.

Judging from the technical performance of carbon-based radio frequency chips that we can achieve at present, the development of carbon-based integrated circuits can be competent for signal amplification within 1500 GHz, frequency multiplication, frequency mixing, frequency-locking and phase-locking and detection within 600 GHz.

These parameters are more than one level superior to the performance that international silicon-based chips can achieve, and they are all basic functional modules to realize terahertz signal transmission and reception. ,

But the problem is that the terahertz radio frequency chip we use is very powerful and safe, but we still haven't designed and developed a matching system framework, and the 6G communication project has encountered a big difficulty here.

Our satellites are now ready for the next test, as if a war is about to break out, our planes are ready to take off, and the cannons are arranged on the designed units, but we have no ammunition! don't know how to fire a weapon safely and accurately

Personally, I am just a young man who studies mathematics. From the perspective of the overall strength of the entire academic community, I am a primary school student who has just started. However, Mr. Gu trusts me and entrusts me with the core and most important mathematical tasks of the 6G project. , but in this kind of big project, I feel the insignificance of the individual.

The formulas and derivations that you see on the blackboard today are the crystallization of the achievements of our department over the years.

If possible, in these links..."