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Generalized coprime planar array antenna structure and angle estimation method

An antenna structure and angle estimation technology, applied in the field of array antenna layout, can solve the problems of degree of freedom limitation, staying in one-dimensional linear array, etc., and achieve the effect of good angle estimation performance and flexible antenna layout.

Active Publication Date: 2017-05-31
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, most of the research still stays in the research of one-dimensional linear array, which cannot meet the actual needs.
The feasibility of a coprime array composed of two square arrays has been demonstrated, but its degrees of freedom are limited by the subarrays with fewer array elements

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  • Generalized coprime planar array antenna structure and angle estimation method
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  • Generalized coprime planar array antenna structure and angle estimation method

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Embodiment Construction

[0019] The technical solution of the present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0020] The present invention designs a generalized coprime planar array (GCPA) antenna structure, which is composed of two rectangular uniform planar arrays, the number of antennas is N respectively 1 ×M 1 And N 2 ×M 2 , Where N 1 , N 2 Is the number of antennas in the x-axis direction, M 1 , M 2 Is the number of antennas in the y-axis direction, the two sub-arrays only have one element at the origin overlap, so the total number of elements is T gcpa =N 1 M 1 +N 2 M 2 -1. N 1 , N 2 And M 1 , M 2 Are two sets of relatively prime numbers. The number of array elements is N 1 ×M 1 The sub-array of, the element spacing in the x-axis direction is d x1 =N 2 λ / 2, the array element spacing in the y-axis direction is d y1 =M 2 λ / 2, where λ is the carrier wavelength; the number of array elements is N 2 ×M 2 The sub-array of, the element...

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Abstract

The invention discloses a generalized coprime planar array (GCPA) antenna structure. The structure is composed of two rectangular uniform planar arrays of which the antenna numbers are N1*M1 and N2*M2 respectively, wherein N1 and N2 are the antenna number in the x-axis direction, M1 and M2 are the antenna number in the y-axis direction, and N1 and N2 and M1 and M2 are two groups of coprime numbers; the two subarrays only have one coincident array element at the original point. A method for conducting angle estimation by means of the antenna structure comprises the steps that angle estimation values with fuzziness are obtained according to a MUSIC or ESPRIT algorithm; angle estimation values of which fuzzy values coincide are found through the coprime characteristic, and then a true value of a corresponding theoretical value is obtained. The antenna structure has the advantages that the antenna aperture is increased, antenna array layout is more flexible, and the relatively higher degree of freedom can be achieved; the two subarrays keep the uniform characteristic, a classical signal arrival angle estimation algorithm can be directly applied, and the angle fuzziness problem can be eliminated through the coprime characteristic.

Description

Technical field [0001] The invention relates to a generalized coprime planar array antenna structure and an angle estimation method, belonging to the field of array antenna layout. Background technique [0002] The traditional antenna layout is restricted by the half-wavelength, that is, the distance between the array elements is smaller than the half-wavelength. Therefore, in the case of a certain number of antennas, the antenna aperture is limited. [0003] Currently, an antenna layout called a co-prime array has received widespread attention. The distance between the array elements breaks through the half-wavelength limit, which greatly expands the antenna aperture and can obtain a good angle estimation performance improvement. However, most of the research still stays in the research of one-dimensional linear array, which cannot meet the actual needs. The feasibility of a coprime array composed of two square arrays has been proven, but its degree of freedom is limited by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/00G06F17/50
CPCG06F30/18G06F30/20H01Q21/00
Inventor 郑旺张小飞翟会曹仁政
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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