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Wide main lobe array antenna gain enhancement method based on alternate projection

An array antenna and alternate projection technology, applied in the direction of antenna, antenna array, diversity/multi-antenna system, etc., to achieve high gain effect

Active Publication Date: 2021-05-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0028] The purpose of the invention is: in order to solve the convergence problem of the existing wide main lobe gain optimization method based on the optimization of the array gain pattern, the present invention discloses a wide main lobe array antenna based on the alternate projection framework based on the alternate projection idea Gain enhancement method, which effectively reduces the computational complexity of existing processing schemes, and ensures the convergence of the new method, making the sidelobe of the array antenna controllable

Method used

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  • Wide main lobe array antenna gain enhancement method based on alternate projection
  • Wide main lobe array antenna gain enhancement method based on alternate projection
  • Wide main lobe array antenna gain enhancement method based on alternate projection

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Embodiment

[0090] Apply the wide main lobe array antenna gain enhancement method based on alternating projections of the present invention to a line array antenna using zero-point symmetry 41 non-uniform distribution, and the array element positions of the line array antenna are shown in Table 1:

[0091] Table 1 Location information of 41-element array antenna

[0092]

[0093] The specific implementation process of the wide main lobe array antenna gain enhancement processing of the above-mentioned array antenna is as follows:

[0094] Step S1: Initialization.

[0095] Set the sidelobe level SLL of the desired shaped beam, such as ρ=-20dB.

[0096] Set the main lobe and side lobe angles of the shaped beam as: Θ ML and Θ SL ,make Where Δθ represents the step size of the incident angle of the discrete signal, that is, the angle range of the incident angle of the signal is discretized, and the angular interval between the incident angles of adjacent signals after discretization i...

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Abstract

The invention discloses a wide main lobe array antenna gain enhancement method based on alternating projection, and belongs to the technical field of array antennas. In order to solve the problem of convergence of an existing wide main lobe gain optimization method based on array gain directional diagram optimization, the invention provides the novel wide main lobe array antenna gain enhancement method based on an alternative projection thought. According to the array antenna gain enhancement method, the original constraint problem is converted into the augmented Lagrange format, which is equivalent to solving a series of constraint sub-problems, so the solving capability of the original problem is greatly simplified, the convergence of the array antenna gain enhancement method is ensured, and the minor lobe of the array antenna is controllable. According to the implementation of the invention, wide main lobe gain graphs with different center angles can be effectively synthesized, and the highest gain and the lowest side lobe level can be obtained.

Description

technical field [0001] The invention belongs to the technical field of array antennas, and in particular relates to a wide main lobe array antenna gain enhancement technology based on alternating projections. Background technique [0002] When using an array antenna to design a wide main lobe beam, existing methods mainly use a beam-forming (Shaped-Beam Pattern Synthesis, SBPS) based method. The beamforming method obtains wide beams by optimizing the array radiation pattern and optimizing the array weight coefficients, which are mainly divided into two categories: evolutionary algorithms and convex optimization algorithms. [0003] Taking the line array antenna as an example (the theoretical process of the planar array antenna can be analogized by analogy), assuming that the antenna has N array elements with arbitrary distribution characteristics (uniform or non-uniform), then when the array antenna receives signals, the The resulting electric field strength can be describe...

Claims

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Application Information

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IPC IPC(8): H04B7/08H01Q21/00H04B7/06
CPCH01Q21/00H04B7/0617H04B7/086
Inventor 雷世文田径林志鹏谢琪高银胡皓全陈波杨伟唐璞何子远
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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