Multi-region joint beam tracking method for large conformal phased array system

Abstract

The invention provides a multi-region joint beam tracking method for a large conformal phased array system, and aims to solve the problems of phase jitter and amplitude jitter which may occur during cross-region tracking of the large conformal phased array system. The method is realized through the following technical scheme: a regional calibration module firstly performs calibration region division on a phased array system, calculates and stores a direction vector pointed by each calibration region, and judges array elements contained in each calibration region to obtain calibration phases ofthe array elements contained in each region; the array element weight module selects calibration phases of three areas near a target pointing direction, derives three groups of array element weightedphases at the target pointing direction, combines the three groups of weighted phases to carry out smooth filtering, and calculates a weighted value of each array element; and the array element weighting module sends the formed sum-difference wave beam to the wave beam tracking module, calculates an angle error voltage, corrects a target direction after loop filtering, and obtains a new target direction, thereby completing target tracking.

Description

technical field [0001] The invention relates to a beam tracking method suitable for a phased array system, especially a beam tracking method suitable for solving the problems of phase jitter and amplitude jitter that may occur when a large conformal phased array system tracks across regions. Background technique [0002] With the rapid development of digital multi-beam and phased array technology, conformal phased array can realize multi-beam and full-space target search and tracking by using array signal processing technology. The direction in which the conformal phased array antenna array has the greatest response is called the beam pointing direction, that is, the direction in which the array has the greatest gain. For a linear array, when the signals are combined without changing the gain and phase, the beam pointing plane is the wide plane of the array and is perpendicular to the line of the array elements. The conformal phased array antenna adopts the electronically c...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a spherical phased array system suitable for the existing large-scale conformal phased array system with high target pointing accuracy, high tracking accuracy, and small beam calculation amount, which can be used in multi-region joint standardization of large-scale conformal phased array system. Beam Tracking Method for Time Calibration

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