Irregular subarray arrangement optimization method capable of realizing high gain

An optimization method and irregular technology, applied in the field of antennas, can solve the problems of decreased gain, complex optimization problems, small scanning angle, etc., and achieve the effect of low side lobes

Active Publication Date: 2020-05-29
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0003] R.J.Mailloux, Andrea Massa and others proposed the method of using irregular sub-arrays to break the periodicity of the array, but because the optimization problem is too complicated, their scheme can only realize one-dimensional scanning, which is poor in engineering applicability
The patent No. CN 107230843A adopts a similar scheme to realize two-dimensional scanning, but the scanning performance is not strong. The sub-arrays composed of two units are arranged at 0.7 wavelength intervals under the array of 20×20, and only It can realize two-dimensional scanning of ±20°. This solution has not fully utilized the scanning advantages of irregular sub-arrays, and its applicability in engineering is poor.
The patent No. CN108808266A also adopts the optimization scheme based on the principle of maximum entropy, but when it is

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  • Irregular subarray arrangement optimization method capable of realizing high gain
  • Irregular subarray arrangement optimization method capable of realizing high gain
  • Irregular subarray arrangement optimization method capable of realizing high gain

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[0033] Consider an irregular array, the size of the array is M×N=16×16, consider that the irregular sub-array is composed of 4 array elements, so there are 16×16 / 4=64 sub-arrays, the antenna elements in the sub-array The excitation amplitude and excitation phase are the same, and the difference between the array information entropy and the information entropy limit value is set to σ=0.05. The reference array is a Chebyshev plane array with 16×16=256 elements.

[0034] Other main parameters are as follows:

[0035] d=d x =d y =0.5λ

[0036] The first step is to optimize the arrangement of irregular sub-arrays through commercial solvers, such as image 3 , An irregular array with a total of 64 sub-arrays is obtained. The information entropy of the optimized array is H=6.6639, and the limit value of the information entropy is log 2 (MN / 2)=7. In the second step, the convex optimization algorithm is used to optimize the amplitude and phase distribution under the desired pattern. Figure...

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Abstract

The invention discloses a phased array arrangement optimization method based on irregular subarrays. A mixed integer linear programming model is provided. Meanwhile, the gain and sidelobe level duringarray scanning are considered, solving is conducted through a commercial solver to achieve the high gain and low sidelobe characteristics during irregular array scanning, and after array arrangementis optimized, a needed directional diagram is synthesized with the maximum gain as the principle through a convex optimization algorithm.

Description

technical field [0001] The invention belongs to the technical field of antennas, relates to an optimization method for irregular sub-array arrangement, proposes a mixed integer programming model, considers the gain and side lobe level during array scanning, and finally realizes high gain and high efficiency during irregular array scanning. Low sidelobe characteristics. Background technique [0002] Phased array antennas are widely used in the radar and communication fields because they can achieve the purpose of beam scanning by changing the phase. At the same time, the amplitude and phase weighting methods of conventional phased arrays are difficult to meet the requirements of low sidelobes of antenna arrays, which limits the application range of antennas. Sparse array antenna, through the sparse arrangement of antenna elements, reduces grating lobes to realize pattern scanning, but the sparse array has many problems such as processing and inter-unit coupling, so it is not...

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Application Information

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IPC IPC(8): G06F30/20G06F30/18H01Q3/26G06F111/04
CPCH01Q3/26
Inventor 杨仕文马彦锴陈益凯屈世伟胡俊
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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