Open an aircraft carrier to fight against Japan

Xu Feng then opened the electronic warfare sub-screen, which displayed the waveform and polarization information of the unfamiliar electromagnetic signal. In modern radar, the waveform and the polarization of the electromagnetic wave are modulated so that the radar can detect targets more accurately.Xu Feng glanced at the electronic warfare screen and found that the waveform and polarization of the electromagnetic waves emitted by the Japanese radar had not been modulated, which showed that the Japanese radar was quite primitive.

Xu Feng detected the Japanese radar signal and immediately notified Lin Yuan, saying: "I have discovered the Japanese radar signal. The operating frequency is 300 MHz. The waveform and polarization are not modulated, and it is a continuous wave radar."

After hearing this, Lin Yuan thought in his heart: "Radar can be divided into two categories according to the type of electromagnetic waves emitted. The first category is continuous wave radar. The electromagnetic waves emitted by this type of radar are continuous. Early radars are like this. One of the biggest drawbacks of this radar is that it cannot measure distance without special frequency and waveform modulation.”

"Because the electromagnetic waves it emits are continuous, the distance cannot be calculated through the time interval between the emitted wave and the echo, so this kind of radar is mostly used by the police in modern society, such as to measure whether the vehicle is speeding. According to Japan's technical level is definitely not capable of complex frequency and waveform modulation, so their radar cannot measure distance."

"There is also a pulse radar, which emits intermittent electromagnetic waves, so it can be used to measure distance, azimuth and speed. Almost all modern military radars are pulse radars."

Thinking of these, Lin Yuan said: "It seems that the radar technology of the Japanese army is still quite primitive, and it is not our opponent. How about you come back first, wait until the thick smoke clears, and then go out again. Next time, turn on the electronic warfare module and suppress the Japanese army's radar technology." radar."

Xu Feng said with a smile: "I'll bring two anti-radiation missiles with me when I go back. I remember the instructor of the military academy once said: 'To deal with the enemy's radar, electronic jamming, deception and suppression are just clouds, and hard killing is the kingly way!' I flew over the Japanese radar with the anti-radiation missile, then threw the anti-radiation missile over there, and directly blew up the little devil’s radar!"

Lin Yuan smiled and said: "Can't you be more compassionate? Is it easy for the little devil to make a radar? We shouldn't destroy it, it's too rough, we should get it for fun."

Xu Feng laughed and said, "Ever since you and Sister Wanqing did that, you have become more and more evil!" After speaking, Xu Feng returned to the base. At about three o'clock in the afternoon, Lin Yuan notified Xu Feng that the smoke had cleared It's time to set off. Xu Feng set off immediately. This time, he turned on the electronic warfare module of the airborne phased array radar as soon as he set off, preparing to suppress the Japanese army's radar.

Xu Feng's fighter plane received the electromagnetic wave signal from the Japanese radar when it flew about [-] kilometers away from the Japanese army's position. Feng found the radar signal of the Japanese army, but the Japanese army has not found Xu Feng.

Xu Feng then activated the electronic warfare module on the plane, and the phased array radar immediately started to work. The receiving unit immediately began to receive and analyze the electromagnetic wave signal of the Japanese army, and obtained its frequency. Emitting electromagnetic waves of the same frequency, these electromagnetic waves will block the receiver of the Japanese radar, making it impossible for the Japanese radar to detect Xu Feng.

Xu Feng secretly laughed in his heart: "Little devil, how do you still find me? You just wait to be sent to the west by my TV-guided missile." Xu Feng called up the three-dimensional topographic map of the Japanese army's position while thinking, and then started Analyzing from which position to launch the missile, just after selecting the position, I saw thick black smoke floating over the Japanese positions.

Xu Feng thought in surprise: "The little devil's radar doesn't look like a pussy parallel import! It can break through the electronic suppression of my fourth-generation fighter! I wonder what advanced technology the little devil uses?" Thinking of this, Xu Feng immediately contacted him. Lin Yuan said, "Brother Lin, I found that the Japanese army's radar is very strong!"

Lin Yuan smiled and said, "An old antique, what's so strong about it?"

Xu Feng said loudly: "The radar of the Japanese army actually found me, but they still lit a fire, and the thick smoke covered the position again."

Lin Yuan gasped when he thought of this, and thought to himself: "Could it be that the little devil has come up with some advanced technology? It shouldn't be, the frequency of their radar is [-] megahertz, and the radar system is continuous wave. Modulation, this kind of radar can also crack our electronic interference? Could it be that there are also talents who can travel through the little devils?"

The more Lin Yuan thought about it, the more puzzled he became, so he asked, "What method did you use to suppress the Japanese army's radar?"

Xu Feng said: "I turned on the electronic warfare module, first detected the frequency of the opponent's radar, and then sent a large number of electromagnetic waves with the same frequency in the direction of their radar to suppress their receivers so that they could not receive the reflections reflected by my plane. Signal."

After hearing this, Lin Yuan let out a long sigh, and said helplessly, "You bastard! No wonder the little devil can find you!"

Xu Feng said aggrievedly, "Why are you scolding me?"

Lin Yuan said: "I told you yesterday that all the Japanese army knew was that there was a plane flying towards them, but they didn't know the precise position and speed information of the plane. Recently, they burn things and smoke, you use a lot of high-intensity electromagnetic waves to suppress their radar today, once they find that the radar receives a lot of interference electromagnetic waves, they will definitely know that the plane is coming, so what are you waiting for if you don’t smoke?”

Xu Feng suddenly realized: "Oh, so it is like this! It seems that the enemy is not too cunning, but I am too stupid..."

Lin Yuan said with a smile: "Don't 'praise' yourself, now you immediately conduct 'deceptive jamming' on the enemy. With that function, our radar can deceive the enemy's radar, making them mistakenly believe that you have already flown It’s far away, and they don’t have much fuel, and they won’t burn it anymore when you leave, the wind is relatively strong today, so you fly around the Japanese positions for a while, and then go back when the smoke clears.”

Xu Feng said: "I understand." Then he turned off the electronic suppression mode, and then turned on the "deceptive jamming" function. The phased array radar immediately sent out an echo with deceptive information. The principle of the radar's speed measurement is The Doppler effect, that is, the frequency of the wave will change with the movement of the target. The echo with deceptive information can simulate this change, making the opposing radar operator mistakenly believe that the target has changed the direction of speed and is moving away from itself.

The Japanese operator was also new to radar and knew little about electronic warfare. When he saw the spoofing echoes from Xu Feng's fighter plane, he immediately reported to his superiors: "Captain, the Chinaman's aircraft has escaped."