An Optimal Method for Arrangement of Irregular Subarrays Achieving High Gain

An optimization method and irregular technology, applied in the field of antennas, can solve problems such as gain drop, poor applicability, and increased gain loss, and achieve low sidelobe effects

An optimization method and irregular technology, applied in the field of antennas, can solve problems such as gain drop, poor applicability, and increased gain loss, and achieve low sidelobe effects

CN111209670BActive Publication Date: 2020-10-13UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • An Optimal Method for Arrangement of Irregular Subarrays Achieving High Gain
  • An Optimal Method for Arrangement of Irregular Subarrays Achieving High Gain
  • An Optimal Method for Arrangement of Irregular Subarrays Achieving High Gain

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Embodiment Construction

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

[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 a commercial solver, such as image 3 , to obtain an irregular array with a total of 64 sub-arrays, the optimized information entropy of the array is H=6.6639, and the limit value of information entropy is log 2 (MN / 2)=7. In the second step, the amplitude and phase distribution under the desired pattern are obtained by optimizing the convex optimiza...

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Abstract

The invention discloses a phased array arrangement optimization method based on irregular sub-arrays, and proposes a mixed integer linear programming model, while considering the gain and sidelobe level during array scanning, and solving it by a commercial solver to realize The high gain and low sidelobe characteristics of irregular array scanning, after optimizing the array arrangement, use the convex optimization algorithm to synthesize the required pattern based on the principle of maximum gain.

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...

Claims

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Application Information

Patent Timeline
13 Oct 2020
Publication
CN111209670B
IPC
G06F30/20; G06F30/18; H01Q3/26; G06F111/04
CPC
H01Q3/26
Inventors
杨仕文; 马彦锴