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Two-dimensional phased-array antenna design method and device and two-dimensional phased-array antenna

A phased array antenna and design method technology, applied in the field of radar, can solve problems such as low efficiency and inability to gather grating side lobes, and achieve the effect of eliminating grating side lobes

Active Publication Date: 2022-05-27
杭州洛微科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. The efficiency of transmitting (or receiving) signals is much lower than that of raster-free sidelobe radars
Although the aperiodic antenna arrangement can effectively suppress the intensity of the side lobes of the grating, it cannot refocus the energy of the side lobes of the grating to the main lobe

Method used

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  • Two-dimensional phased-array antenna design method and device and two-dimensional phased-array antenna

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Embodiment 1

[0036] This embodiment discloses a method for designing a two-dimensional phased array antenna. figure 1 , including the following steps:

[0037] Obtain the number N of antennas, the wavelength and the minimum distance between the antennas, and construct a grid of N*N equidistant grid points according to the number N of antennas and the wavelength; wherein, the distance between any antennas is not less than the minimum distance;

[0038] According to the constraint that there is only one antenna distribution in each row and each column and the distance between any antennas is not less than the minimum spacing, obtain all the antenna distribution arrays of the antennas in the grid of equidistant grid points, and denote M types of antennas distributed array;

[0039] The far-field distribution data of each antenna distribution array is obtained by calculation, and the signal-to-noise ratio corresponding to each antenna distribution array is calculated according to each far-fi...

Embodiment 2

[0069] Based on the above method, the present invention also provides a two-dimensional phased array antenna, including the following structures:

[0070] The number of antennas is N; the antennas are arranged at the grid points of the N*N grid, and there is only one antenna in each row and each column; the grid point spacing is equal, and the grid point spacing is less than or equal to half a wavelength; the distance between any antennas is different. It is less than the minimum distance between antennas; the signal-to-noise ratio of the far-field distribution obtained by the arrangement of N antennas in an N*N grid is the largest. This embodiment discloses an optimal two-dimensional phased array antenna calculated based on the method of Embodiment 1, which is used for radar design.

Embodiment 3

[0072] Based on the method disclosed in Embodiment 1, a two-dimensional phased array antenna design device is also provided, which can realize the parameters of the number of input antennas and the grid spacing, that is, can output all the two-dimensional phased array antennas that meet the conditions, and further can directly The optimal solution is output, that is, a two-dimensional phased array with the largest signal-to-noise ratio.

[0073] The device includes:

[0074] an input unit for inputting the number N of antennas;

[0075] The output unit is used to output a specified two-dimensional phased array or an optimal two-dimensional phased array based on the number of input antennas;

[0076] A processing unit for 1) calculating all two-dimensional phased arrays of N antennas under a grid of N*N grid points; 2) calculating far-field distributions of all two-dimensional phased arrays, and signal-to-noise ratio; 3) screening Two-dimensional phased array with the largest...

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Abstract

The invention discloses a two-dimensional phased-array antenna design method and device and a two-dimensional phased-array antenna in the technical field of radar, and the method comprises the steps: obtaining the number N of antennas, the wavelength and the minimum spacing of the antennas, and constructing a grid with N * N equidistant grid points according to the number N of the antennas and the wavelength; according to the constraint conditions that only one antenna is distributed in each row and each column and the distance between any antennas is not smaller than the minimum interval, all antenna distribution arrays of the antennas in the grids of the equidistant grid points are obtained; far-field distribution data of each antenna distribution array is calculated and obtained, and signal-to-noise ratios corresponding to all the antenna distribution arrays are calculated according to all the far-field distribution data; and selecting a required antenna distribution array from all the antenna distribution arrays according to the signal-to-noise ratio parameter. A two-dimensional phased array design scheme and a two-dimensional phased array antenna arrangement structure for eliminating grating side lobes by using fewer antennas are realized.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a two-dimensional phased array antenna design method, device and two-dimensional phased array antenna. Background technique [0002] A two-dimensional phased array consists of a plurality of antennas arranged on a two-dimensional plane according to a certain rule. A two-dimensional phased array can be used to transmit signals in a directional manner. These antennas simultaneously transmit (or receive) electromagnetic waves with a certain phase relationship and use the interference effect of electromagnetic waves to achieve directional transmission (or reception) of signals. By changing the phase relationship between the antennas, it is also possible to perform two-dimensional scanning within a certain angle range to become a phased array radar. Periodically arranged antenna arrays were first used in phased array radars due to their advantages of easy implementation and easy data p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/06H01Q21/00H01Q3/30G06F30/20
CPCH01Q21/0087H01Q21/061H01Q3/30G06F30/20Y02A90/10
Inventor 张其浩孙笑晨刘飞
Owner 杭州洛微科技有限公司
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