Everyone knows each other, they met last year, and Mr. Zhang knew Gu Tingting earlier, and even later Gu Tingting was in the test flight institute, everyone has met a few times, and this time I met here, Mr. Zhang was very surprised.

"Come, sit, there's a fan here, it's cooler." Teacher Zhang said.

"Teacher Zhang, I didn't bother you." Qin Feng said.

"Where, I'm glad to have a guest like you." Teacher Zhang said.

Qin Xue beckoned the brothers to eat watermelon and gave Teacher Zhang a piece, so everyone chatted while eating watermelon.

"Mr. Zhang, I'm so happy, we are also starting to make a breakthrough in airborne radar in China." Qin Feng said.

As an insider, this kind of conversation is not a leak, and after hearing Qin Feng say this, Mr. Zhang began to briefly introduce it, after all, the processing technology of the flat slot antenna of the radar she is responsible for is for this airborne radar.

"This radar of ours, codenamed 1471." Teacher Zhang said: "Tingting should know the meaning of this number. ”

Gu Tingting is also developing airborne electronic equipment, and now, as soon as Mr. Zhang said this, Gu Tingting speculated next to her: "The 14 in front represents 14, and the 7 and 1 in the back, I really don't know." ”

Teacher Zhang smiled: "The 7 in the back represents the antenna diameter is 700 mm, and the 1 in the back represents the first paragraph." ”

"This is simply our Tianzi-1 project on the airborne radar system!" Qin Feng said with a sigh, this is a zero breakthrough, in order to find a radar for his own fighters, Tu Lao spent a lot of effort, and selected models everywhere, and he was so involved with Marconi Company at the beginning, not because he didn't have it.

Moreover, the antenna diameter is 700 mm, which can be loaded into many aircraft, and this kind of radar can be used for your own J-8, modified J-7 CP, and even the new J-7 under development.

"The person in charge of the model is Director Ben." Mr. Zhang said: "I am not responsible for anything else, only the processing technology of this antenna. ”

Before engaging in the research of this antenna processing technology, she was responsible for the high-frequency component process work of 408 long-range warning radar and 180 precision tracking radar and other products, so to speak, this is completely counterpart.

An advanced airborne pulse Doppler radar has many aspects of technology to overcome, and the radar antenna in front is only a part, and the processing machine in the back is also quite critical.

"Do you know how our integrated circuits are developing?" Qin Feng asked.

Although Mr. Zhang only worked on this antenna, of course Qin Feng knew that if this radar was to be successfully developed, it was definitely not only about the antenna, but also about the circuit behind it.

The previous radar was analog, and the current radar must be a digital radar to filter ground clutter, in fact, it relies on large-scale integrated circuits, which are obtained by quickly calculating the Fourier transform, and what are the similar AD and DA conversion circuits, etc., if there is no integrated circuit support, it is a castle in the air.

Domestic chips are a pain in the future, but at the very beginning, the development of domestic chips is not slow.

At that time, the People's Republic of China had just been established, and there were only a few cable and radio factories in the country, and the production capacity was very low. Later, according to the political situation at that time, he began to ask Big Brother for help, and at the time of the second business negotiations, he asked the Soviet Union to help build a production plant for tubes, radio components and switches.

But what about it, tubes and switches are easy, electronic components are rejected, the Soviets say very simply, the Soviets' own factories were built with the help of the GDR, if you want to find it, go to the GDR!

Of course, the Soviets are a kind of prevarication, and they themselves have a lot of radio technology experts, don't look at the Soviets advocating electron tubes, but in the production of integrated circuits, they are not lagging behind.

Requests from the domestic and GDR sides, with their help, led to the establishment of a number of factories, but the electronic components were eventually built by their own technicians.

In those years, after the establishment of the motherland, countless technicians began to return, breaking through the imperialist rush barrier, returning with their scientific brains and with their patriotic enthusiasm.

The development of electronic technology is not late, in 1947, Bell Labs in the United States just invented the semiconductor point contact transistor, opening the semiconductor era. In the motherland, in 1959, under the leadership of Professor Lin Lanying, silicon monocrystalline was pulled out only one year later than the United States, which was the first step of the chip.

In the same year, Professor Li Zhijian pulled out high-purity polysilicon at Tsinghua University. In 1965, the first integrated circuit in China was born.

Even in the turbulent period of ten years, the construction of domestic semiconductors has not stopped, especially in 1972, China's self-developed large-scale integrated circuits were born in Yongchuan Semiconductor Research Institute, realizing the leap from the development of small and medium-sized integrated circuits to large-scale integrated circuits.

In 1975, the 109 factory of the Chinese Academy of Sciences produced China's first 1024-bit dynamic random access memory, which is very tongue-twisting, in short, it is memory, one of the most important components of the computer. Although this achievement is four or five years later than that of the United States and Japan, it is four or five years earlier than that of South Korea.

Seeing the future generations, South Korea has become the leader of the memory world, in fact, back then, they were even more backward than China.

It's just that after entering the eighties, foreign integrated circuits developed rapidly, but domestic began to stagnate, and as a result, all the chip markets were given to foreign countries.

Of course, this refers to civilian chips, and in the field of military chips, it is absolutely impossible to ask for people!

Hearing Qin Feng's question, Mr. Zhang said: "I don't know much about this, but I heard that in the circuit design of airborne radar, most of the electronic parts are produced by ourselves. ”

Most of them are produced by themselves, that is, a small number of them are not?

Mr. Zhang smiled: "Our main task now is to get it out first, as for the improvement of performance, we have to wait until we get it out, first solve the problem, and then solve the level of performance, I heard that the processor, the use of 8086 chips." ”

This kind of radar is completely blank in China, so now it is necessary to get it out first, and many of our domestic chips cannot be self-produced, so it is also possible to use foreign ones, however, this uses 8086 chips, which still sounds very surprising.