Active phased array detection device considering both open region and tree sheltered region

Abstract

The invention discloses an active phased array detection device considering both an open region and a tree sheltered region, and belongs to the field of ground reconnaissance and detection radars. The device comprises an active phased-array antenna, a digital transmitting and receiving assembly, a power supply unit, an amplitude-phase calibration unit, a signal processing unit, an algorithm, a waveform beam controller and a display control terminal. According to the invention, the requirements of small penetration attenuation of electromagnetic waves in a tree and small multipath influence of ground transmission are considered, staring observation and azimuth angle high resolution of the radar on a detection area are realized by using the radar active phased-array antenna, the waveform beam controller generates beam / waveform switching for high-speed and low-speed targets which are shielded by low altitude, ground and trees, clutter interference is suppressed by adopting a tree clutter modeling method, reconnaissance and detection of moving targets in a tree shielding region are realized, and reconnaissance and monitoring of moving targets in an open region by a traditional ground monitoring radar are taken into consideration.

Description

technical field [0001] The invention relates to the field of ground reconnaissance radar, in particular to an active phased array detection device that takes into account open areas and areas covered by trees, and is suitable for reconnaissance and monitoring of moving targets in open areas and low and ultra-low altitudes, and moving targets under the conditions of trees. . Background technique [0002] At present, moving target reconnaissance and surveillance radars mainly use low frequency bands with strong penetrating performance of bushes and foliage, such as VHF frequency band and UHF frequency band. The radar system adopts mechanical scanning, phased array scanning or SAR The realization of the system is characterized by small shading effects of trees and strong ability to penetrate trees; its disadvantage is that under ground conditions, a certain erection height is required to eliminate low-frequency multipath interference, and at the same time it cannot realize long...

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Problems solved by technology

[0002] At present, moving target reconnaissance and surveillance radars mainly use low frequency bands with strong penetrating performance of bushes and foliage, such as VHF frequency band and UHF frequency band. The radar system adopts mechanical scanning, phased array scanning or SAR The realization of the system is characterized by small shading effects of trees and strong ability to penetrate trees; its disadvantage is that under ground conditions, a certain erection height is required to eliminate low-frequency multipath interference, and at the same time it cannot realize long-distance reconnaissance and detection on the ground, resulting in the loss of equipment functions. Simplification

[0003] In addition, conventional ground reconnaissance and surveillance radars mostly use higher frequency bands, such as X-band, Ku-band, Ka-band, etc., which are characterized by high resolution, small size and light weight of equipment, and small impact of ground multipath, but reconnaissance and detection under the condition of trees weak ability

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