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Vector averaging calibration method for phased-array antenna

A phased array antenna and calibration method technology, applied to antennas, antenna arrays, electrical components, etc., can solve problems such as being unsuitable for online calibration of antennas, and achieve the effects of good engineering applicability, high precision, and reduced impact

Inactive Publication Date: 2012-04-11
10TH RES INST OF CETC
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[0017] This method is mainly suitable for calibration in the e

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  • Vector averaging calibration method for phased-array antenna
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  • Vector averaging calibration method for phased-array antenna

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[0027] refer to figure 1 . exist figure 1 In the typical composition of the described vector average calibration system, the phased array antenna with N units and N TR components with phase shifters are connected in series, parallel or space wirelessly to form a correction feeding network, and the phased array antenna is formed through a beamforming network. control array antenna. The beam forming network, the TR component containing the phase shifter and the above-mentioned antenna constitute a feed branch of the phased array antenna, and the feed branch is the object to be calibrated. The feed branches of each phased array antenna are connected to the two microwave signal ports of the calibration amplitude and phase receiver through the beamforming network and the correction feed network to form a transceiver loop; each TR component passes through the calibration network (parallel feed network, series feed Network, wireless feeder network) and beamforming network are co...

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Abstract

The invention provides a vector averaging calibration method for a phased-array antenna, and aims to provide a vector averaging calibration method capable of improving calibration accuracy and avoiding the influence of phase-shifting errors of branch phase shifters. The method comprises the following steps of: (1) serially/parallelly connecting the phase-array antenna with N units and N transmitter-receiver (TR) components comprising N phase shifters to obtain a calibration feed network, and connecting each phase-array antenna feed branch to a calibration amplitude phase receiver through a beam-forming network and the calibration feed network to obtain a transmitter-receiver circuit; (2) setting a phase-array antenna feed branch consisting of the beam-forming network and the TR components comprising the phase shifters as an object to be calibrated, and performing phase shift on the phase shifters by using a wave shaper; and (3) obtaining the initial phase and amplitude distribution of each branch by using a vector averaging algorithm, wherein the difference between the phase and the amplitude distribution and the designed phase and amplitude distribution is a calibration parameter. The calibration method has the advantages of high accuracy and engineering applicability.

Description

technical field [0001] The invention relates to a phased array antenna vector average calibration method. Background technique [0002] In addition to the performance degradation of the phased array antenna due to the mechanical and thermal deformation of the array, its key component, the T / R component, will also change the amplitude and phase of the excitation current of each antenna element due to environmental changes and device aging. 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. At the same time, the alignment accuracy is affected by the phase shift error of its own phase shifter. [0003] At present, there are many research methods on calibration, and the representative ones are: [0004] Zou Yongqing, Cao Jun, Li Guangzhong. Angle...

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Application Information

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IPC IPC(8): H01Q3/00H01Q3/30H01Q21/00
Inventor 杨顺平张云何海丹
Owner 10TH RES INST OF CETC
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