Other vector rotation calibration method for phased array antenna
A phased array antenna, vector rotation technology, applied in the directions of antennas, antenna arrays, electrical components, etc., can solve the problem of not being suitable for online calibration of antennas, and achieve good engineering applicability, reduce some errors, and reduce calibration accuracy. Effect
Active Publication Date: 2012-09-19
10TH RES INST OF CETC
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[0021] This method is mainly suitable for calibration in the experimental stage, not suitable for antenna online calibration
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[0054] According to the present invention, set a phased array antenna of N units and its element vector rotation calibration composed of beam forming network, TR assembly containing phase shifter, antenna, correction feed network, calibration amplitude and phase receiver, and beam controller system. The correction feeding network in the alternate vector rotation calibration system can be other forms of coupling networks such as parallel feeding network, space feeding network, near-field antenna coupling and the like.
[0055] The beamforming network, the TR component with phase shifter, and the antenna are a typical phased array antenna feeding branch, which is the object to be calibrated. The calibration amplitude and phase receiver is used to test the amplitude and phase values. The wave controller realizes the control of the antenna. phase shift.
[0056] Through the above combination, the calibration parameters are obtained according to the other vector rotation method, a...
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The invention discloses an other vector rotation calibration method for a phased array antenna, and aims to provide a calibration method which has high practical amplitude value testing accuracy and can be used for effectively avoiding repeated introduction of errors in a phase shifting state. The method can be implemented through a scheme consisting of the following steps of: setting a phased array antenna of an N unit and an other vector rotation calibration system, setting a phased array antenna branch consisting of a wave beam forming network in the system and a TR assembly comprising a phase shifter as a calibration object, performing phase shifting on an antenna phase shifter by using a wave controller connected between the tail end of the RT assembly and an amplitude phase receiver, and testing a complex signal reaching the amplitude phase receiver and an amplitude phase value in each phase shifting state through a calibration amplitude phase receiver connected with the initial end of the antenna unit and the wave beam forming network; and acquiring the initial phase and amplitude distribution of each feed branch through other vector rotation, obtaining the amplitude phase error of each feed branch by using an other vector rotation calibration algorithm, and correcting parameter differences to realize calibration of the phased array antenna.
Description
technical field [0001] The invention relates to a phased array antenna vector rotation calibration method. In the method, the phase state of the measured branch remains unchanged, and the phases of other branches change by 360 degrees, so it is called other vector rotation. Background technique [0002] In the prior art phased array antenna, in addition to the degradation of the antenna performance due to the mechanical and thermal deformation of the array, its key component - the T / R component will also cause the amplitude and phase of the excitation current of each antenna array element to change due to environmental changes, device aging and other reasons. The change. These changes will cause indicators such as antenna sidelobe and beam pointing accuracy to decline. Therefore, the calibration and compensation of the amplitude and phase of each antenna feed branch is the key to the long-term and effective operation of the active phased array radar. [0003] At present, t...
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Inventor 杨顺平杜艳何海丹张凯刘伟
Owner 10TH RES INST OF CETC