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A Sparse Linear Array Antenna

A linear array and sparse technology, applied to antennas, antenna arrays, devices for manufacturing antenna arrays, etc., can solve the problem of array element location and optimal setting of array element excitation, limited fixed grid division, etc., to save the number of array elements , the effect of reducing the mismatch error

Active Publication Date: 2021-03-09
NAT SPACE SCI CENT CAS
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the number of array elements of sparse linear arrays existing in current radio system antennas, the optimal setting of array element positions and array element excitations are limited by the division of fixed grids

Method used

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  • A Sparse Linear Array Antenna
  • A Sparse Linear Array Antenna
  • A Sparse Linear Array Antenna

Examples

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example 1

[0098] In Example 1, a sparse linear array is synthesized within a given array aperture L=9.5λ to realize a Chebyshev pattern with a sidelobe level of -20dB. Existing studies have shown that if a uniform full array with an adjacent element interval of 0.5λ is used, 20 array elements are needed; if the pattern realized by the full array is used as a reference pattern, considering the symmetrical structure of the array, here only The positive semi-axis of the array aperture is divided into grids, and the sparse linear array antenna is designed using the traditional compressed sensing method. Under the premise that the initial number of grids is 951, 13 array elements are required to achieve the desired reference pattern. Using the sparse linear array antenna proposed by the present invention, when the initial number of grids is only 23, only 12 array elements are needed to achieve the same radiation characteristics, and the integrated pattern is as follows image 3 As shown, it ...

example 2

[0101] Example 2 Design a sparse linear array within a given array aperture L=9.5λ to achieve as image 3 The cosecant beam pattern shown. Utilize the method of the present invention, set the initial array element number to be 37, simulation result shows, the antenna of the present invention design only needs 15 array elements, and the comparison result of pattern is as follows Figure 4 As shown, it can be seen that the sparse linear array antenna of the present invention has achieved the desired radiation characteristics, and the corresponding array element positions and excitations are shown in Table 2. From this example, it can be seen that the antenna of the present invention can be any beam-shaped Sparse linear array antenna.

[0102] Table 2

[0103] Array element number Array element position (λ) Array element excitation Array element number Array element position (λ) Array element excitation 1 0 0.1336-j0.1031 9 5.3580 -0.6477+j0.5463 ...

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Abstract

The present invention proposes a sparse linear array antenna, which relates to the field of wireless communication, and includes several array elements, the several array elements are non-uniformly distributed in a given array aperture, the number of array elements, the position of the array elements and the The optimal value of the excitation parameter of the array element is calculated according to the requirement of the given pattern index, and the final structure of the sparse linear array antenna is determined according to the optimal value of the parameter. The sparse linear array antenna of the present invention combines parameter learning and sparse recovery theory, and revises the compressed sensing model that only optimizes sparse excitation into a generalized compressed sensing model that simultaneously optimizes the element position and sparse excitation, so that the existing alternate optimization algorithm can be used Effectively solve the array synthesis problem, which effectively reduces the grid size and the mismatch error caused by grid division. By optimizing the number of array elements, the position of the array elements and the excitation of the array elements, while saving the number of array elements, it can Suitable for synthesis of various shaped beams.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a sparse linear array antenna. Background technique [0002] As we all know, compared with the uniform array, the sparse array refers to achieving equivalent radiation performance with as few array elements as possible through the non-uniform distribution of array element positions within the same array aperture. Obviously, the sparse array has significant advantages such as fewer array elements, simple antenna structure and feed network, and low system cost. It has been well applied in radio systems such as radar, satellite communication, and radio telescope, as shown in reference [ 1]: (X. Zhao, Y. Zhang, Q. Yang, "A Hybrid Algorithm for Synthesizing Linear Sparse Arrays," Prog. Electromagn. Res. C, vol. 63, pp. 75-83, 2016). Although the sparse array has significant array advantages and application prospects, because this type of antenna needs to optimize the fou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/29H01Q21/00G06F17/10
CPCG06F17/10H01Q21/0087H01Q21/29H01Q21/293
Inventor 赵晓雯杨青山张云华
Owner NAT SPACE SCI CENT CAS
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