Method for suppressing uniform ultra-sparse array antenna beam pointing fuzziness

Abstract

The invention belongs to a method for processing uniform ultra-sparse array antenna beam pointing fuzziness in the radar technology. The method comprises the steps of; performing initialization processing; performing directional transmission and reception by a first main lobe according to the set reference working frequency and two associated working frequency and pulse number in turn and performing comprehensive processing on the acquired three groups of target information so as to determine the existence of the target and removing pointing fuzziness caused by a grating lobe; when the target exists, inputting the angle and distance, speed and magnitude value of the target into a radar data processor together; and then repeatedly performing the processing on other main lobes so as to finish detection of the target on the pointing position of each main lobe. In the method, the angle range without grating lobe fuzziness is two times wider than that of two pieces of background technology and the array element number is reduced by over 50 percent, so that the method for the suppressing the uniform ultra-sparse array antenna beam pointing fuzziness is characterized in that: adverse impact of the grating lobe on the radar measured angle can be removed to the full extent; the antenna array element number and corresponding channel number of large-aperture uniform array radar are effectively reduced; the system cost is reduced, the application range is enlarged, and the like.

Description

technical field [0001] The invention belongs to the processing method of ultra-sparse array antenna grating lobes in the technical field of radar, in particular to a processing method for uniform ultra-sparse array antenna beam pointing blur. Background technique [0002] Angle resolution characterizes the ability of the radar system to distinguish tangential targets, which directly affects the angle measurement accuracy of the radar. The angular resolution of the radar system depends on the beam width of the radar antenna, and the beam width of the antenna depends on the aperture of the antenna. Therefore, the larger the antenna aperture of the radar system, the higher the angular resolution and angle measurement accuracy. [0003] The uniform array antenna is a common form of radar antenna. By weighting the phase and amplitude of the transmitted or received signals of each element of the array antenna, the beam shape and beam pointing of the array antenna can be changed, t...

AI Technical Summary

Problems solved by technology

[0007] This method needs to obtain the angle values ​​obtained by the scanning and detection of the two frequencies in the range between the main lobe and the first grating lobe, and then the simple remainder calculation of the target's azimuth can be performed, and the angle range of the scanning detection is narrow ;Therefore not only has poor real-time performance, but also cannot be used for ultra-sparse arrays due to the small range of angles that can suppress blurring and the large number of array elements required

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