Phase-scanning and mechanism-scanning combined airspace searching method based on spaceborne radar

Abstract

The invention discloses a phase-scanning and mechanism-scanning combined airspace searching method based on a spaceborne radar. The method comprises the following steps of: (1) generating a searching wave beam with a fixed shape on an azimuth plane and first initiating the searching direction of an antenna array plane toward an azimuth dimension; (2) carrying out pitching dimension searching wave beam by using a pitching dimension-dimension phased array on the antenna array plane, and implementing pitching dimension airspace searching on a sine space by using characteristics of a phased array antenna wave beam; (3) rotating the antenna array plane to the position of a next azimuth angle; and (4) judging whether an azimuth dimension wave beam direction angle is rotated to a maximum searching azimuth angle direction or not and whether the pitching dimension airspace searching is finished or not; and if so, finishing the searching; and otherwise, carrying out the searching processes of the step (2) and the step (3) in a repeated way. According to the invention, an airspace searching method with different complementary and mixed searching methods as well as combined phase-scanning and mechanism-scanning of the spaceborne radar is achieved; and the phase-scanning and mechanism-scanning combined airspace searching method based on the spaceborne radar, disclosed by the invention, has the advantages of high searching speed, short target capturing time, uneasiness for losing targets, good impact shock resistance, less T / R units and suitability for being used on spaceborne platforms with finite resources.

Description

technical field [0001] The invention relates to an airspace search technology suitable for payloads on a spaceborne application platform with limited resources, in particular to an airspace search method based on the combination of phase-scanning and machine-scanning of spaceborne radar. Background technique [0002] At present, domestic spaceborne radars use two-dimensional mechanical scanning for airspace search. Its disadvantage is that when the mechanical moving parts are working, it will generate disturbance torque to the satellite body, increase the burden of satellite attitude control, affect the control accuracy of the platform, and be resistant to shock and vibration. Poor; under the conditions of target tracking and measurement, the beam flexibility is not good, the beam pointing step is large, and the tracking and measurement errors are large; in order to maintain the stability of the spaceborne platform, its search speed is slow, and it is difficult to guarantee t...

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Problems solved by technology

[0002] At present, domestic spaceborne radars use two-dimensional mechanical scanning for airspace search. Its disadvantage is that when the mechanical moving parts are working, it will generate disturbance torque to the satellite body, increase the burden of satellite attitude control, affect the control accuracy of the platform, and be resistant to shock and vibration. Poor; under the conditions of target tracking and measurement, the beam flexibility is not good, the beam pointing step is large, and the tracking and measurement errors are large; in order to maintain the stability of the spaceborne platform, its search speed is slow, and it is difficult to guarantee the performance of radar search and capture , not suitable for search and capture of high-speed targets

[0003] In addition, a small number of on-orbit spaceborne radars currently under study in China use a two-dimensional phased array scanning method for airspace search, which has the advantages of beam agility, high reliability, strong fault tolerance, and no disturbance of mechanical moving parts. The reason is that this type of scanning method requires a large number of T / R (transmit / receive, sending and receiving modules) components, high development costs, difficult development, heavy weight, high power consumption, and difficult to apply to spaceborne platforms with limited resources. Big

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