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
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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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