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Directional diagram numerical optimization method for round caliber planar-array antenna

A planar array antenna, numerical optimization technology, applied in antennas, antenna arrays, electrical digital data processing and other directions, can solve the problems of increased computational complexity, array directional decomposition, etc., to reduce the computational load and iteration times, reduce memory consumption and The effect of the number of iterations

Active Publication Date: 2018-04-24
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

[0004] When optimizing triangular grid plane arrays and circular aperture plane arrays in the traditional method, since the array directivity cannot be decomposed in the Z direction and the Y direction, each unit parameter can only be included in the optimization vector, which will make the numerical optimization The amount of calculation increases sharply with the increase of the number of array elements

Method used

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  • Directional diagram numerical optimization method for round caliber planar-array antenna
  • Directional diagram numerical optimization method for round caliber planar-array antenna
  • Directional diagram numerical optimization method for round caliber planar-array antenna

Examples

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Embodiment 1

[0093] Embodiment 1: In this example, the numerical optimization of the amplitude weighted matrix of a rectangular grid planar array with a circular aperture is carried out. The parameters are set as follows: the main frequency of transmission is 15 GHz, the diameter of the array aperture is 0.2 meters, the unit spacing is half a wavelength, and the number of units is 317; The pointing angle is set to (80°, 10°); the null angle 1 is (110°, 10°), and the null width is 1; the null angle 2 is (80°, 35°), and the null width is 5; The optimal population size is twice the length of the optimal vector, the variation factor is 0.6, and the crossover probability is 0.9. The optimization index is that the side lobe level reaches -40dB, and the null trap level reaches -60dB.

[0094] The optimization results are shown in Fig. 3(a)-(e). Figure 3(a) is the linear phase required for the main beam pointing to (80°, 10°); Figure 3(b) is the optimized amplitude weighting matrix, it can be see...

Embodiment 2

[0095] Embodiment 2: In this example, the numerical optimization of the amplitude weighted matrix of the circular aperture triangular grid planar array is carried out, and the parameters are set as follows: the main frequency of transmission is 15 GHz, the diameter of the array aperture is 0.2 meters, the unit spacing is half a wavelength, and the number of units is 367; The pointing angle is set to (100°, -10°); the null angle 1 is (130°, -10°), and the null width is 1; the null angle 2 is (100°, 20°), and the null width is 5. The optimized population size is twice the length of the optimized vector, the variation factor is 0.6, and the crossover probability is 0.9. The optimization index is that the side lobe level reaches -40dB, and the null trap level reaches -60dB.

[0096] The optimization results are shown in Fig. 4(a)-(e). Figure 4(a) is the linear phase required for the main beam pointing to (100°, -10°); Figure 4(b) is the optimized amplitude weighting matrix. It ca...

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Abstract

The invention discloses a directional diagram numerical optimization method for a round caliber planar-array antenna. The method comprises the following steps that: firstly, according to system parameters, including antenna emission frequency, the caliber shape and size of the array, an array unit interval and the like, establishing the array unit layout of round caliber distribution; according toa wave beam pointing angle appointed by a user, determining the phase weighting of each unit; and then, setting a range weighting optimization vector, initializing the range weighting optimization vector, and adopting a differential evolution algorithm to carry out iterative numerical optimization on the range weighting optimization vector until the fitness value of an optimal optimized vector islower than a set threshold. By use of the method, the numerical optimization problem of the round caliber rectangular grid planar array and a round caliber triangular grid planar array is favorably solved, a required range weighting matrix can be quickly optimized, and directional diagram indexes, including minor levels, null levels and the like, on an array directional diagram, meet indexes.

Description

technical field [0001] The invention relates to the technical field of numerical optimization of phased arrays, in particular to a method for numerical optimization of the pattern of a circular-aperture planar array antenna. Background technique [0002] In the prior art, optimization theories such as genetic algorithm, particle swarm optimization algorithm, and differential evolution algorithm are used to solve numerical optimization problems of array antennas and numerical optimization problems of time-modulated arrays, and a large number of research results have been obtained. However, the current research results on the numerical optimization of arrays are basically used for one-dimensional uniform linear arrays and rectangular grid planar arrays with rectangular apertures, and there are relatively few reports on the research on triangular grid arrays and circular aperture arrays. [0003] When solving the problem of a rectangular grid array with a rectangular aperture, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50H01Q21/00
CPCG06F30/00H01Q21/00
Inventor 蒋忠进崔铁军陈阳阳
Owner SOUTHEAST UNIV
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