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Adaptive antenna phase center calibration method and device
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An adaptive antenna, phase center technology, applied in the direction of antenna, antenna radiation pattern, electrical components, etc.
Inactive Publication Date: 2017-09-01
上海资誉电子科技有限公司
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[0005] In view of this, the purpose of the present invention is to provide a phase center calibration method and device for adaptive antennas, to solve the problem of phase centers of adaptive antennas, and to start from the available beams in the presence of interference, for different adaptive antenna formations and anti-interference Algorithm phase center performance is evaluated
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Embodiment 1
[0066] figure 1 It is a flowchart of a phase center calibration method for an adaptive antenna provided in Embodiment 1 of the present invention.
[0067] refer to figure 1 , the method includes the following steps:
[0068] Step S101, obtaining phase patterns of different interference directions according to the weighting of the array elements;
[0069] Here, firstly, the antenna pattern under different interference conditions is obtained according to the array antenna, and then the gain pattern and the phase pattern of different interference directions are respectively obtained according to the antenna pattern.
[0070] Specifically, for an array antenna with N array elements, the antenna pattern under different interference conditions can be known from formula (1) and formula (2):
[0071] P(θ,φ)=P s (θ,φ)w H a(θ,φ) (1)
[0072] w=[w 1 w i …w N ] (2)
[0073] Among them, P s (θ, φ) is the pattern of a single array element, w is the weighted value of the array e...
Embodiment 2
[0111] Figure 4 It is a schematic diagram of a phase center calibration device for an adaptive antenna provided in Embodiment 2 of the present invention.
[0112] refer to Figure 4 , the device includes a first acquisition module 10 , a second acquisition module 20 , a least squares fitting processing module 30 and an average processing module 40 .
[0113] The first acquisition module 10 is configured to acquire phase patterns of different interference directions according to the weighting of array elements;
[0114] The second acquisition module 20 is configured to acquire the set of available beam phase patterns of different interference directions according to the array antenna beam;
[0115] A least squares fitting processing module 30, configured to perform least squares fitting processing on the set of available beam phase patterns of the different interference directions, to obtain a set of phase center performances of the different interference directions;
[011...
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Abstract
The invention provides an adaptive antenna phase center calibration method and device. The method comprises the following steps: obtaining a phase pattern under different interference directions according to array element weighting; according to an array antenna beam, obtaining an available beam phase pattern set under different interference directions; carrying out least square fitting processing on the available beam phase pattern set obtained under the different interference directions, and according to the phase pattern obtained under different interference directions, obtaining a phase center performance set under different interference directions; and carrying out average processing on the phase center performance set obtained under different interference directions to obtain phase center performance of an adaptive antenna. The method and device can evaluate phase center performance under different adaptive antenna formation and anti-interference algorithms starting from available beams under the condition of existence of interference.
Description
technical field [0001] The invention relates to the technical field of antennas, in particular to a phase center calibration method and device for an adaptive antenna. Background technique [0002] Adaptive antennas are an effective means of eliminating radio frequency interference and multipath interference in satellite navigation applications. However, the adaptive antenna will cause the change of the phase center of the antenna while suppressing the interference. In high-precision satellite navigation applications, the change in phase center after adaptive antenna beamforming needs to be evaluated. [0003] For fixed-beam antennas, the phase center of the antenna is fixed, and the evaluation of the antenna phase center can be realized through anechoic calibration. [0004] For adaptive antennas, the beam varies with interference and the phase pattern is not fixed. By estimating the presence of interference, the phase center introduces a deviation between the carrier ph...
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