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A Gain Enhancement Method of Wide Main Lobe Array Antenna Based on Alternating Projection

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

Active Publication Date: 2021-10-26
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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  • A Gain Enhancement Method of Wide Main Lobe Array Antenna Based on Alternating Projection
  • A Gain Enhancement Method of Wide Main Lobe Array Antenna Based on Alternating Projection
  • A Gain Enhancement Method of Wide Main Lobe Array Antenna Based on Alternating 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 method for enhancing the gain of a wide main lobe array antenna based on alternating projection, and belongs to the technical field of array antennas. In order to solve the convergence problem of the existing wide main lobe gain optimization method based on array gain pattern optimization, the present invention sets up a new wide main lobe array antenna gain enhancement method based on the alternate projection idea. The present invention transforms the original constrained problem into an augmented Lagrangian format, which is equivalent to solving a series of constrained subproblems, thereby greatly simplifying the solving ability of the original problem, and ensuring the performance of the array antenna gain enhancement method of the present invention. Convergence makes the sidelobe of the array antenna controllable. The implementation of the invention can effectively synthesize wide main lobe gain diagrams with different center angles, and ensure that the invention can obtain the highest gain and the lowest side lobe level.

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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Patent Type & Authority Patents(China)
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