Bright Sword starts with the grenade flat.

Chapter 529 Kane's Crisis Sense

Of course, whether it is a long-wave radar or a short-wave radar, whether the wavelength is millimeters, centimeters or meters, these radars all require a fourth part of the radar, that is, the radar's ear, the radar receiver, to realize the reception of the transmitted waves.

The radio waves transmitted from the target are received and returned to the radar antenna before it has time to move from one direction to another.

In order to obtain information about the target from the radio waves reflected by the explored target, such as its direction, altitude, distance, etc., it is necessary to have something like a bat's ears.

On the radar, this part is called the radar receiver, which is a particularly sensitive "ear". In order to make the radar's detection distance as far as possible, the radar transmitter power is very large. However, the power of the radio waves reflected from the distant target is extremely small.

For example, if a radio wave of 1,000 kilowatts is transmitted and reaches 500 kilometers away and hits a fighter plane, the power of the radio wave reflected back from it is only a tiny part of the power transmitted.

When the reflected radio wave returns to the radar antenna and enters the radar receiver, it is even smaller. Its power is less than one picowatt.

The radio wave signal reflected by a distant target is so weak that it usually needs to be amplified millions of times before it can be observed on the radar display. This task of amplifying millions of times is completed by the radar receiver.

The radar receiver is exactly the same as an ordinary superheterodyne radio receiver in principle. The only difference is that it does not receive medium wave or short wave radio broadcast signals, but receives ultra short wave or microwave radar signals reflected from the target.

Because the operating frequency of the radar is too high, it is not easy to directly amplify such a high frequency signal by millions of times.

Therefore, after the signal enters the receiver, its frequency must first be changed, that is, it must be lowered from a higher ultrashort wave or microwave band to a lower intermediate frequency. This is called frequency conversion.

The signal with a lowered frequency is amplified again and again by many stages of amplifiers made of transistors or electron tubes, so that it can be amplified millions of times more easily. This receiver that amplifies after frequency conversion is called a superheterodyne receiver.

Of course, how to keep the radar's reflected signal from being distorted during the amplification process is a difficult problem that engineers have to solve.

Since radar was invented in the early 20th century to deal with aircraft that had just appeared, radar technology has been constantly updated and improved.

However, more than two hundred years have passed, and now it is the 22nd century. Although radar technology has undergone many updates, and because the energy problem has been solved, annihilation reactors are used on spacecraft and space fighters, so energy is naturally not lacking.

Therefore, the power of the radar will naturally become greater and greater, and the detection distance will become farther and farther, but this still cannot change one fact.

The fact is that radars more than 200 years later are still no different in principle from the first generation of radars. They still emit electromagnetic waves, which are then bounced off the target and finally received, thereby discovering the target.

However, this situation is likely to change now, because the lost warship is very likely not equipped with an ordinary electromagnetic wave radar, but a radar that uses other detection principles to achieve detection.

Just when Liu Xiu was half a light year away, using the enemy and friend map to detect the situation of the lost warship, he suddenly saw Kane's Feitian No. 1 rushing to this starry sky through space jump.

Of course, Kane naturally discovered the battleship, but neither Kane's Feitian No. 1 battleship nor the Disclaude battleship driven by pirates discovered Liu Xiu.

It is obvious that although both sides have lost their warships, they do not have the means of superluminal detection like Liu Xiu's enemy and friend map.

Therefore, it was naturally impossible to discover Liu Xiu, who was half a light year away.

Although Kane had just jumped over through space, he did not hesitate after discovering Descloud's lost battleship.

He immediately started the thrusters and rushed towards the enemy, and soon entered the range. Kane was a person with a positive outlook and a hatred of evil, so after discovering the enemy warship, he said to Millie and Kaina on the ship without hesitation:
"This is too much. Pirates have no human rights at all. Just attack!"

Then, as Kane's spaceship approached at a high speed, Disklaude naturally discovered Feitian No. 1, but it was obvious that Kane's immediate attack caught him off guard.

In the interval when the warships of both sides passed each other, the energy cannon controlled by Millie hit Disclaud with two consecutive energy cannons.

However, the energy cannon controlled by Millie was just an ordinary energy cannon on Feitian-1, not the plasma cannon on Feitian-1.

Therefore, naturally, no fatal damage was caused to the lost battleship of Disclaude.

When the pirate leader saw that the enemy warship was so powerful, he naturally gave up the idea of ​​a head-on confrontation.

It immediately started a space jump and left the radar detection range of the Feitian-1 spacecraft.

Of course, the pirate leader did this to increase his radar advantage. The Descloud driven by the pirate leader did not move too far away, but jumped a distance of one astronomical unit and came out.

Although one astronomical unit is not very far, it is beyond the detection range of radar.

You have to know that the speed of light takes eight minutes to travel one astronomical unit, and the electromagnetic waves of radar are also at the speed of light!

So it takes sixteen minutes for the radar wave to be sent out, reflected back and received.

But what was very strange was that the opponent's Desclaud had just come out of the space jump, as if he had already discovered Feitian No. 1.

Liu Xiu was able to see through the friendly and enemy map that in Desclaud's cockpit, the pirate leader was staring at a three-dimensional projection!
The image displayed on this stereoscopic projection is exactly the picture of Feitian-1.

At this time, Feitian No. 1 stopped and stayed where it was after the other party entered the space jump.

When the pirate leader saw that the other party was standing still without moving, he naturally would not let go of such a good opportunity. After all, the distance between him and the Feitian No. 1 battleship was eight minutes' beam!

Therefore, even if we use a light-speed energy cannon to attack, it will take eight minutes for the light-speed energy attack to arrive.

During this time period, it would be difficult to aim at the target if the target makes irregular movements.

This is like a sniper using a bullet to kill an enemy two kilometers away. The bullet alone has to fly for three or four seconds. If the enemy moves during this time, then naturally the bullet will not hit him.

However, it is obvious that the pirate leader underestimated Kane, the protagonist. You know, most people with high mental power have an extra attribute, which is crisis sensing.

It was obvious that Kane was such a person. Just when the light speed was about to hit Feitian No. 1, Kane immediately shouted for Kenar to avoid the opponent's attack.

(End of this chapter)