Electric scanning self-tracking method for dynamic target by digital multi-beam phased-array antenna

A phased array antenna and digital multi-beam technology, which is applied in the field of aerospace measurement and control, can solve the problems of improving antenna beam grating lobes, and achieve the effect of simple implementation method, low hardware resource consumption, and saving hardware resources and hardware costs

Pending Publication Date: 2020-06-02
10TH RES INST OF CETC
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AI Technical Summary

Problems solved by technology

In order to reduce the antenna mutual coupling, it is necessary to increase the spacing of the array elements, but increasing the spacing of the array elements will increase the antenna beam grating lobe

Method used

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  • Electric scanning self-tracking method for dynamic target by digital multi-beam phased-array antenna
  • Electric scanning self-tracking method for dynamic target by digital multi-beam phased-array antenna
  • Electric scanning self-tracking method for dynamic target by digital multi-beam phased-array antenna

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Embodiment Construction

[0013] refer to figure 1 . According to the present invention, in the angle tracking system of the multi-beam phased array antenna, the front of the multi-beam phased array antenna and the radio frequency front-end, with the beam pointing to the target as the center, circularly scan the four angles deviating from a δ angle according to the azimuth and elevation directions. Symmetrical point, the digital beam is used to conduct off-axis conical electronic scanning of the tracking target, and the beam electronic scanning control is carried out. The digital beam forming DBF unit uses the downlink digital beam forming DBF channel to receive the digital multi-beam phased array antenna front and send it to the RF front end. The digital signal that comes down is controlled by beam electronic scanning, and according to the beam pointing and forming sum and difference signals, azimuth and elevation difference beam signals are generated, and the sum and difference signals formed by the ...

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Abstract

The invention provides an electric scanning self-tracking method for a dynamic target by a digital multi-beam phased-array antenna, and aims to provide a method which is simple and reliable, consumesless hardware resources and can improve the self-tracking performance of the multi-beam phased-array antenna. According to the technical scheme, the method is realized according to the following stepsof in an angle tracking system of the multi-beam phased-array antenna, scanning four symmetric points deviating from one delta angle circularly in an azimuth direction and a pitching direction with abeam pointing target as the center, and carrying out cone electric scanning and beam electric scanning control over an off-axis line on a tracking target; enabling a DBF unit to generate the azimuthand pitch difference beam signals, and send the sum and difference signals to an angle tracking receiver to demodulate an azimuth error voltage and a pitch angle error voltage; using a wave control unit to adjust the azimuth and pitch angle of the beam pointing to obtain the beam pointing of the tracking target, and sending the beam pointing adjusted in real time to a digital beam forming DBF unitto complete the beam forming, and guiding the phased array beam antenna to realize the self-tracking function of the dynamic target.

Description

technical field [0001] The invention relates to a self-tracking method for electrical scanning of a digital multi-beam phased array antenna in the field of aerospace measurement and control. Background technique [0002] Digital beamforming (DBF) is a comprehensive technique in many fields such as array antenna and signal processing. DBF technology can be applied to both receive mode and transmit mode. Although multi-beamforming is realized digitally, by controlling the local oscillator to convert several signals to the same intermediate frequency, the more the number of beamforming, the larger the composition of the equipment, the corresponding volume and weight and the basic reliability of the system. Low. Digital phased array antennas have been widely used on many platforms because of their fast beam scanning, easy beam shaping and strong anti-interference ability. In order to realize multi-beam, the traditional phased array antenna system will obviously increase in we...

Claims

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Application Information

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IPC IPC(8): G01S13/68
CPCG01S13/68
Inventor 王文政
Owner 10TH RES INST OF CETC
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