Sparse linear array antenna

A linear array, sparse technology, applied in the directions of antennas, antenna arrays, and devices for manufacturing antenna arrays, etc., can solve the problems of the position of the array elements and the optimal setting of the 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: 2019-10-22
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

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  • Sparse linear array antenna
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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 invention provides a sparse linear array antenna, and relates to the field of wireless communication. The sparse linear array antenna comprises a plurality of array elements which are distributedin a given array aperture in a non-uniform mode, the parameter optimal values of the array element number, the array element positions and the array element excitation of the array can be obtained according to the given directional diagram index requirements, and the final structure of a sparse linear array antenna is determined according to the parameter optimal values. According to the sparse linear array antenna, a compressed sensing model which only optimizes sparse excitation is revised into a generalized compressed sensing model which simultaneously optimizes the array element position and the sparse excitation by combining a parameter learning theory and a sparse recovery theory, so that the array comprehensive problem can be effectively solved by adopting the existing alternative optimization algorithm, the grid quantity and the mismatch error caused by grid division are effectively reduced, and the sparse linear array antenna can be suitable for the synthesis of various shapedbeams while the array element quantity is saved by optimizing the array element number, the array element positions and the array element excitation.

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 Applications(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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