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Arbitrary interval linear array end-fire enhanced phase configuration method

A linear array and configuration method technology, applied in the field of array antennas, can solve the problem of low directivity coefficient of ordinary end-fire, achieve the effect of reducing precision requirements and processing difficulty, and reducing sensitivity

Active Publication Date: 2022-05-17
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0007]In order to solve the technical problems faced by the above-mentioned background technology: the general end-fire directivity coefficient of the linear array at any interval is low, and the Hansen-Woodyard condition cannot be applied to realize the enhanced end-fire Radiation array, the present invention provides a phase configuration method of an arbitrary interval isolation enhanced end-fire linear array, that is, by introducing a phase constant correction factor, calculating the general embodiment of an arbitrary interval linear array, and further improving the directivity coefficient of an arbitrary interval linear array

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  • Arbitrary interval linear array end-fire enhanced phase configuration method
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  • Arbitrary interval linear array end-fire enhanced phase configuration method

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Experimental program
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Embodiment A6

[0066] Embodiment A.6 element equally spaced linear array

[0067] The arrangement of array elements satisfies interval The amplitude excitation of the array element is I n =1, the phase excitation is α n =β(1+δ)Z n , where the spacing common ratio k=1.1, and the space angle scanning step is set to 1°. See figure 2 , Schematic diagram of the phase correction factor scanning of the embodiment of the six-element equal-ratio spaced linear array, the correction factor is scanned in the range of 0<δ<0.5, and the correction factor scanning step is set to 0.01. For an ideal omnidirectional radiation array element, within the correction factor scanning range Two extremum points are obtained successively from 0 in the positive interval of , and their physical meanings are respectively the maximum directivity coefficient corresponding to the optimal correction factor value; the phase correction factor end-fire array condition critical value.

[0068] When the value of the corre...

Embodiment C

[0074] Example C. 6-element sparse linear array

[0075] A 6-element sparse linear array is designed so that the distance between the array elements is greater than half the wavelength, and the grating lobes are eliminated in the visible region. refer to Figure 8 , Schematic diagram of the position of the array element of the six-element sparse linear array, the position of the array element is Z n =[0; 0.831λ; 1.331λ; 1.910λ; 2.563λ; 3.5λ], the amplitude excitation of the array element is I n =1, the phase excitation is α n =β(1+δ)Z n , set the space angle scan step to 1°.

[0076] refer to Figure 9 , Schematic diagram of scanning the phase correction factor of the embodiment of the six-element sparse linear array, the correction factor is scanned in the range of 0<δ<0.3, and the scanning step of the correction factor is set to 0.01. When the correction factor is 0.06, when the maximum directivity coefficient is reached, the directivity coefficient of the correspondin...

Embodiment A

[0081] Table embodiment A, B, C parameter comparison

[0082] Through the parameter comparison tables of Examples A, B, and C, it can be concluded that this method has slightly different optimization effects on linear arrays with different intervals, but still has two advantages of high efficiency and universal applicability. In embodiment C, the array spacing is first determined through genetic algorithm optimization, and then the phase constant correction factor is used to realize the super-directional optimization of the array with a spacing greater than half a wavelength. Compared with other existing super-directional optimization methods in the field of array antennas, this method optimizes the array element with uniform amplitude excitation, which reduces the sensitivity of excitation configuration in practical applications, and reduces the processing difficulty and accuracy requirements.

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Abstract

The invention discloses a phase configuration method for end fire enhancement of a random interval linear array, relates to the field of array antennas, provides an end fire enhancement implementation method suitable for the random interval linear array, and further improves the directivity coefficient of the end line array. The method comprises the following steps: popularizing an end-fire array condition suitable for a uniformly spaced linear array; introducing a phase constant correction factor suitable for any interval linear array; directivity coefficient scanning is carried out on the linear array under uniform amplitude excitation, a corresponding phase constant correction factor when the directivity coefficient is maximum is obtained, and any interval linear array end-fire enhanced phase configuration is achieved; and comparing the directional diagrams and performance parameters of the common end-fire array and the enhanced end-fire array. According to the method, the Hansen Wood Dead condition suitable for the uniform interval linear array is popularized, the phase factor correction constant is introduced, end fire enhancement of the linear array at any interval is achieved, the array excitation sensitivity is low after optimization, and the phase matching method is wide in application range.

Description

technical field [0001] The invention relates to an array antenna, in particular to a phase configuration method for endfire enhancement of a linear array at random intervals. Background technique [0002] With the development of radio technology, antennas or antenna arrays, as the signal transmitting / receiving terminals of wireless communication systems, have been gradually integrated into modern national defense and all aspects of people's daily life. The reasons for using an array antenna include its ease of achieving extremely narrow beams, improved antenna directivity and gain, and ease of achieving shaped beams and patterns with low sidelobe levels. The analysis of array antenna is carried out from four aspects: the total number of array elements, the spatial distribution of array elements, the excitation amplitude distribution of each array element and the excitation phase distribution of array elements. The synthesis or design of the array antenna is to meet the expe...

Claims

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Application Information

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IPC IPC(8): G06F30/27G06F111/04G06F111/06
CPCG06F30/27G06F2111/04G06F2111/06Y02D30/70
Inventor 刘颜回刘巍杨仕文胡俊
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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