Angle searching method based on multi-beam signals

Abstract

The invention relates to an angle searching method based on multi-beam signals and belongs to the active radar angle searching technology field. According to the method, a transmit-receivable separation characteristic of a phased array antenna is utilized, on the condition that a directional diagram of an emission antenna is not changed, multi-beam digital signal processing on reception signals is carried out, so an equivalent wave beam width of a reception antenna is improved, and a searching wave position setting number is reduced; a to-be-searched spatial domain is divided into multiple zones or wave positions, acquired multi-beams are utilized for target searching, stay at each wave position for a time segment is carried out in order, that the wave positions having targets can be captured with relatively high probability is guaranteed. Through the method, an instantaneous reception multi-beam directional diagram is formed by utilizing phased array wave beam rapid agility and the digital multi-beam formation technology, reception-direction pattern main lobe coverage is formed at a wave beam overlapping portion during original single wave beam searching, so reception-direction pattern loss is greatly reduced, reception wave beam width is equivalently broadened, and searching performance of a seeker is improved.

Description

technical field [0001] The invention relates to an angle search method based on multi-beam signals, belonging to the technical field of active radar angle search. Background technique [0002] The detection distance is one of the most important technical indicators of the radar. When the target indication accuracy is coarse, the search time will seriously affect the detection performance of the radar target. How to ensure that the angle search is completed in a short time to cover the target area to be measured , to achieve reliable interception of targets is an essential technical issue in radar design. As the working frequency band of the radar is widely extended to the millimeter wave band, the main beam width of the antenna is getting narrower and the corresponding search time is getting longer and longer. In order to ensure the detection distance of the target, the rapid search and interception design of the radar must be realized. , when the radar searches for the tar...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an angle search method based on multi-beam signals, so as to solve the problem that the pattern loss at the intersection of the search wave positions is increased sharply due to the use of the wave position dwell mode when searching for the target

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