Now for Zhang Wenhao, the most easily cross-era products are electronic products, the production of this kind of products is nothing more than relying on semiconductor technology and chip technology, so whether it is radar or satellites, it is not a big problem for Dongchen.

In addition, Xiao Er has merged the core technology of radar and positioning satellites, and in general, Dongchen can now knead the two together for joint development.

Whether it is a radar or a positioning satellite, you need to have an absolute grasp of the electromagnetic waves emitted by yourself, which makes the nature of electromagnetic waves have changed greatly, in short, it is equivalent to setting up a communication function with the main body for each electromagnetic wave, so that the electromagnetic waves can be transmitted at the same time, they can timely feedback the trajectory and distance of their own operation to the main body, the coverage area of the phased array radar is nothing more than a radius of several hundred kilometers, but the satellite should cover a very large area at high altitude, And cooperate with other satellites to complete seamless coverage of the world, this amount of engineering is very huge even for Dongchen, and Zhang Wenhao's initial entry point was selected on the radar.

Zhang Wenhao uses a high-precision electronic processing production line to reduce the volume of the phased array antenna to a cylinder that is less than one centimeter long and 2 millimeters in diameter.

When the first miniature phased array antenna was produced, Zhang Wenhao immediately combined it with the radar body and the computing chip to conduct independent tests on the individual antennas.

The detection range of an ordinary airborne radar will not exceed two hundred kilometers. The biggest problem is the limited power. After all, every kilogram of an airplane's weight is precious. It is impossible to bring extremely powerful radars into the sky, so even if the detection range of 200 kilometers is reached, it only refers to the maximum distance, and at this distance, the ability to detect targets is greatly weakened, except for large targets, small targets, or targets that move too fast. Basically, it will only be found within 100 kilometers, and due to the radar antenna problem of the airborne radar, the upward viewing distance is generally only about 100 kilometers, and the downward viewing distance is even shorter, most of which are maintained between 80-100 kilometers, which is also related to the lifting limit of the aircraft.

However, the phased array radar antenna designed by Xiao Er can reach a detection distance of at least 300 kilometers or more, if the power is increased. The theoretical maximum detection range can reach five hundred kilometers, and. The electromagnetic waves of this radar will not deviate in any way even at a distance of 500 kilometers, and can be clearly perceived in any special circumstances.

This test for a single antenna was carried out by Zhang Wenhao alone, of course, plus the little two in his head, a person and a virtual character.

The host equipment of the whole set of radar and a single phased array antenna were lifted to the courtyard outside the production line, Zhang Wenhao turned on the radar and sent power to the phased array antenna according to the requirements of Xiao Er, and set the emission elevation angle of the phased array radar to 30 degrees.

Zhang Wenhao looked at the display on the radar display screen and said: "The radar just showed that the radar wave changed in an instant at a distance of 14 kilometers, and a target point appeared on the radar, but after a second, it returned to a straight line and the distance also returned to 300 kilometers, what is the situation?" ”

Xiao Er didn't think about it, so he replied: "There was a reflection at that moment. ”

Speaking, Xiao Er said: "We only use a phased array antenna now, which also means that the detection distance is very narrow, just like the light of a concentrating flashlight, if it passes a fast-moving aircraft or object at a position of 30 degrees and 14 kilometers above the oblique, then it will reflect the radar wave in an instant, but after an instant, the aircraft has already left the detection range of the radar, if we are installed in more than 10,000 antennas, then we can carry out three-dimensional coverage in the entire airspace, in this way, Our radar wave is no longer a line, but the whole three-dimensional wrapping around, even if the target is fast, it will be perceived by different antennas in turn, and then the antenna can give a clear framework for the movement of the whole target after the measurement of the change of the radar wave. ”

Zhang Wenhao nodded and said, "If this is the case, then even an aircraft with good stealth performance will lose its stealth ability." ”

"That's right." Xiao Er smiled: "The traditional radar wave is foolish, as long as there is no reflection of feedback, the radar will determine that there is no target in a certain area, it is clean and safe, in this way, as long as the radar reflection surface of the aircraft is small enough, the radar is almost useless, but in the face of our radar, the aircraft is meaningless whether it is absorbed or reflected, our detection range is for example 300 kilometers, at the position of 300 kilometers, suddenly an aircraft appeared, he absorbed or refracted all our radar wavesThen our computing chip can calculate its position, shape and trajectory in an instant according to the change of the distance and state of the radar wave. ”

Saying that, Xiao Er made an analogy and said: "Radar waves are like a rainstorm, the raindrops are extremely dense, in this case, once there is an object moving under the rainstorm, it is impossible to avoid the coverage of the rainstorm, and according to the trajectory of each raindrop, you can outline the opponent's action posture in the rainstorm." ”

Zhang Wenhao opened his mouth and asked: "If this radar technology is applied to the airborne radar, our radar will be able to find the target at the first time, but for the fire control system, in addition to indicating the target, what help is there?" ”

"Nothing helps." Xiao Er said: "We are not ready to design a new fire control system, we can find countless targets at the same time, but how many targets can be effectively locked, it depends on the ability of the fire control system itself, besides, this is also related to fire performance, and, even if we also upgrade the fire control system, but the current technical conditions of air-to-air missiles are not enough to cooperate well with this radar, most of the current missiles are in a state of ignoring after firing, locking on the target, launching the missile, and the rest is left to the missile to judge for itself, However, regardless of whether the missile is guided by infrared or radar, once the other side discovers that the missile is approaching, it will have enough time to release jamming bombs or even inject fuel and burn it to interfere with the judgment of the missile. ”

Speaking of which, Xiao Er said: "If you want to really apply radar to the attack category, then the guidance method of the missile will have to be replaced, and the missile does not need to rely on infrared guidance or its own radar guidance, all rely on phased array radar for guidance, for example, our phased array radar found ten targets, the fire control system locked on these ten targets, the aircraft can launch four air-to-air missiles in one round at the same time, the pilot selected four targets, and then the radar locked on these four targets throughout the process, When the pilot presses the missile launch button, the missile ignites out of the cabin, at this time, the cooperation between the missile and the phased array radar is turned on, and the phased array radar continuously transmits the latest and most accurate position information of their respective targets to different missiles, directly guiding the missile to hit the past, so that even if the other party releases the jamming bomb, it cannot interfere with the judgment of the missile, because the missile is not judging by itself, but completely relying on the guidance of the main radar, and the main radar will bite the other party from beginning to end, and will not be deceived by the opponent's means. So, in this case, the missile's hit rate will be greatly improved. ”

Zhang Wenhao was stunned, and then said: "You mean that you not only want to build radar, but also build fire control systems, and then you have to build missiles?" ”

Xiao Er nodded and said, "That's right, one ring after another, if you want to improve comprehensively, any one is indispensable." ”

Zhang Wenhao asked rhetorically: "I also built the aircraft engine, and the feeling is that they just built an aircraft cover, and the rest is left to me?" ”

Xiao Er smiled: "If you want to achieve an all-round improvement, then it can only be like this." Saying that, Xiao Er said again: "Moreover, if we build it ourselves, we won't build the J-20, the overall start-up design of the J-20 is not good, and the appearance is not very good-looking." ”

"Forget it." Zhang Wenhao waved his hand and said: "Don't think about it so much, let's build the radar in a down-to-earth manner, and the air defense capability has been greatly improved. ”

Immediately, Zhang Wenhao made an analogy and said: "For example, we have one such plane at hand, and when the other party is still 500 kilometers away from us, we have already taken the lead in discovering and biting the enemy, and then the missile's hit rate is amazingly high, as long as the load is sufficient, the battle damage ratio can be infinitely larger, and such an aircraft, with two mixed in a flying squadron, can destroy one of the opponent's flying squadrons." ”

Xiao Er said with a smile: "If we upgrade again, upgrade to the shape and special paint without any radar reflective surface, basically go to any airspace, it is like entering a no-man's land, if the aerodynamic performance is improved, the speed of the aircraft reaches more than Mach 3, then it is basically interspersed with two back and forth in the air combat area, and the other party is basically left." ”

"No, no, no." Zhang Wenhao hurriedly waved his hand and said: "There is no need at all, if we do this, I am afraid that we will become a global public enemy, or according to the original plan, only build radar!" ”

Xiao Er smiled: "Basically, there is no problem to overcome, our phased array antenna has met the design requirements, and the rest is on a radar antenna, densely covered with more than 10,000 phased array antennas, in this way, the radar will become." (To be continued.) )