Super Weapon Swap System

How to radiate electromagnetic waves? At first, an antenna and a ground wire were used. When the high-frequency signal was loaded, it could be transmitted.

Later, with technological progress, magnetron appeared, which is a vacuum tube. Under the control of mutually perpendicular constant magnetic field and constant electric field, the electrons in the tube interact with the high-frequency electromagnetic field to convert the energy obtained from the constant electric field into microwave energy, so as to achieve the purpose of generating microwave energy.

This device happened during World War II. It was completely practical in World War II. All kinds of radars are inseparable from magnetron. This magnetron has been continuously improved and has been used now.

Yes, even now, even the extremely advanced flat slot radar antenna is just an antenna that emits electromagnetic waves. The source of electromagnetic waves is still the magnetron behind the antenna.

Even for passive phased array radar, the core is magnetron.

Only when it comes to the active phased array radar, the principle has changed.

The core of passive phased array radar is the phase shifter. The back emits electromagnetic waves, and the front phase shifter changes the phase of electromagnetic waves, while the active phased array radar emits electromagnetic waves by the antenna itself. When transmitting, the phase is different.

Therefore, active phased array radar is also called active phased array radar. The antenna transmits itself, which is active.

The core of this active phased array antenna design is t / R module. Each component is a transmitting / receiving unit. At the same time, it is not an ordinary antenna, but a circuit board itself.

Qin Guan knows that this component is very important. He once exchanged the information of this component and gave it to 114 institutes. However, Qin Guan has never opened it. He is only a super military fan. When it comes to this professional knowledge, he knows very little.

Now Qin Guan was surprised to find that this thing was a circuit board?

"The basic chip setting of this component module includes three MMICs components and a digital large-scale integrated circuit VLSI. The first three are high-power amplifier, low-noise amplifier plus protection circuit, adjustable gain amplifier and adjustable phase shifter."

After a pause, Zhang Gong continued, "we wanted to integrate all circuits into one chip, but we failed. Such integration is too difficult and has serious electromagnetic interference problems, so we classified the circuits according to their functions, placed them on different chips, and then connected them through hybrid microcircuits."

Qin Guan was surprised with this component in his hand. I see. The development of his microelectronic technology has laid the foundation for the research and development of phased array radar. He thought it was precision machining. It turned out to be so.

"We now use MMICs technology based on GaAs process. One disadvantage of MMICs technology is that its thermal conductivity is very low, so GaAs based circuits need heat dissipation design." Zhang Gong smiled: "in fact, this module is everyone's contribution, and my main contribution is its heat dissipation design."

In the past, he only knew that the active phased array radar was very advanced and that the technology was difficult to achieve. Qin Guan didn't know how to do it. Now that he came here, Qin Guan finally understood that the antenna is a circuit board with four integrated circuits. Then, such small thin plates need to be combined together.

"Because it needs to generate heat, we need to install each T / R module on the backplane with heat dissipation plate, so as to dissipate the heat generated by the T / R module in time."

"We adopt the most advanced chip structure. Each T / R module is formed by vertical stacking of three layers of circuit boards, and each layer of circuit board includes four T / R circuits. The heat generated by the circuit in the T / R module is transmitted to the surrounding metal structure through the circuit board for dissipation. This structure has many problems, such as the biggest problem is the single radiation of each antenna array The element must accurately ensure its position in the array, and the accuracy requirement is higher than the slot processing of our flat panel slot radar. "

Qin Guan nodded, remembered something and said, "there should be two ways of cooling the phased array radar antenna, air cooling and water cooling?"

Qin Guan remembered that the shield ship of the Han Dynasty and the flat phased array radar had an arc cover at first, that is, the air-cooled heat dissipation method. Later, it became a flat plate. It was already a water-cooled method. Compared with the two, it must be better to be water-cooled.

"Yes, what we want to do now is airborne radar. This kind of radar can only use air cooling for heat dissipation. Moreover, due to the relatively high speed of the fighter, the entry of cooling air is not a problem. If it is shipborne, water cooling is the appropriate choice."

Qin Guan's coming today is really an eye opener. So far, his side has finally made a breakthrough in the fourth generation aircraft, that is phased array radar!

Suddenly, Qin Guan remembered something: "our radar requires more processors?"

If every radiation unit needs precise control, the demand for computer processing power is great.

"Yes, Mr. Qin, at present, we can only use commercial aircraft. We have taken a fancy to Hanxin No. 2 chip of Hanxin technology company. The server formed by the combination of these chips can fully meet our needs. However, this is also a reason for criticism. We think that using commercial aircraft can not avoid electromagnetic radiation in nuclear war."

Qin Guan nodded and said: "Up to now, some people still hold the view of nuclear war. If we want to deal with nuclear war, only electronic tubes can do. If we use electronic tubes, how large should our equipment be? The future war is high-tech war, nuclear deterrence, which is just a kind of deterrence. If a nuclear war breaks out, even if we use electronic tubes to develop early warning Machine, that's no use! "

Phased array radar has the voice of opposition, including the greatly increased processing capacity. Commercial aircraft must be used instead of special military reinforced chips.

In fact, which early warning aircraft in the world uses special military products? They are all used after the reinforcement of commercial aircraft. Even aegis warships use small commercial aircraft. Because the military performance is low and the processing capacity is not enough, they can not meet the demand at all.

"My personal suggestion is that since our active phased array radar technology has been developed, we should simply use this technology to build early warning aircraft. When the air force holds a technical conference on early warning aircraft, I will support it." Qin Guan said: "let's aim at the direction of phased array radar!"