What are the advantages of lidar compared with ordinary microwave radar?

Compared with ordinary microwave radar, laser radar uses laser beam, and its working frequency is much higher than that of microwave, so it brings many characteristics, including

high-resolution

Lidar can obtain extremely high angle, distance and speed resolution. Usually, the angular resolution is not less than 0. 1 made, that is to say, it can distinguish two targets which are 0.3 meters apart at a distance of 3 kilometers and track multiple targets at the same time; The range resolution can reach 0.1m; The resolution of velocity can reach within 10 m/s, and the high resolution of range and velocity means that range-Doppler imaging technology can obtain clear images of targets. High resolution is the most obvious advantage of lidar, and most of its applications are based on it.

Good concealment and strong anti-active interference ability.

Laser travels in a straight line with good directivity, and the beam is very narrow, so it can only be received on its propagation path, and it is difficult for the enemy to intercept it. Moreover, the aperture of the transmitting system (transmitting telescope) of lidar is very small, and the receiving area is narrow, so the probability of intentionally transmitted laser jamming signals entering the receiver is extremely low. In addition, unlike the situation that microwave radar is easily influenced by electromagnetic waves widely existing in nature, there are not many signal sources that can interfere with laser radar in nature, so laser radar has strong anti-active interference ability and is suitable for working in an increasingly complex and intense information warfare environment.

Good low-altitude detection performance

Due to the influence of various ground echoes, microwave radar has a certain area of blind area (undetectable area) at low altitude. For lidar, only the illuminated target will reflect, and there is no influence of ground object echo at all, so it can work at "zero height", and its low-altitude detection performance is much better than that of microwave radar.

Small size, light weight

Usually, ordinary microwave radar is huge, the whole system has a mass of several tons, and the aperture of optical antenna is several meters or even dozens of meters. Lidar is much lighter and more dexterous. The aperture of the launching telescope is generally only a few centimeters, and the minimum mass of the whole system is only a few tens of kilograms. Installation and disassembly are very simple. Moreover, the structure of lidar is relatively simple, easy to maintain, convenient to operate and low in price.