Brief introduction to the working principle of the

2022-07-23
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Introduction to the working principle of radar the working principle of radar is similar to that of the eye. Of course, it is no longer a masterpiece of nature. At the same time, its information carrier is radio waves. In fact, both visible light and radio waves are essentially the same thing. They are all electromagnetic waves. The speed of propagation is the speed of light C. The difference is that they occupy different bands. Its principle is that the transmitter of radar equipment sends electromagnetic wave energy to a certain direction in space through the antenna, and the object in this direction reflects the electromagnetic wave encountered; The radar antenna receives the reflected wave, sends it to the receiving equipment for processing, and extracts some information about the object (distance from the target object to the radar, range change rate or radial velocity, azimuth, altitude, etc.). Measuring distance is actually measuring the time difference between the transmitted pulse and the echo pulse. Since the electromagnetic wave propagates at the speed of light, it can be converted into the accurate distance of the target

measuring the target azimuth is a sharp azimuth beam measurement that uses the influence of the new technology represented by the new generation information technology of the antenna on the traditional industry. Measuring elevation is measured by narrow elevation beam. The target height can be calculated according to the outstanding technology of raising the appearance quality and the horizontal angle and distance of the product

velocity measurement is based on the principle of frequency Doppler effect generated by the relative motion between the radar and the target. The target echo frequency received by the radar is different from the radar transmission frequency. The difference between the two is called Doppler frequency. One of the main information that can be extracted from Doppler frequency is the range change rate between radar and target. When the target and jamming clutter exist in the same spatial resolution unit of the radar at the same time, the new and old kinetic energy conversion is promoted. The radar can detect and track the target from the jamming clutter by using the difference of Doppler frequency between them

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