Decoupling method based on genetic algorithm for frequency diversity conformal array beam and antenna

A frequency diversity, conformal array technology, applied in the field of radar antennas, can solve the problems of limited application, energy can not be concentrated in the target area, and the radar has poor adaptability to complex environments.

Active Publication Date: 2018-02-02
XIDIAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: the antenna pattern of the current frequency diversity array has a coupling phenomenon in the range-angle domain, and the energy cannot be concentrated in the target area, which makes the frequency diversity array radar less adaptable to complex environments. Poor, which limits its application in target tracking, distance dimension interference suppression, etc.

Method used

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  • Decoupling method based on genetic algorithm for frequency diversity conformal array beam and antenna
  • Decoupling method based on genetic algorithm for frequency diversity conformal array beam and antenna
  • Decoupling method based on genetic algorithm for frequency diversity conformal array beam and antenna

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Embodiment 1

[0121] Embodiment 1: Set the array element number N=8 of the frequency diversity conformal array, and the center frequency f 0 =10GHz, array element spacing d=0.5λ, conformal surface is a cylindrical surface with radius Radius=3.33λ, λ is the wavelength of the electromagnetic wave in the air at the center frequency, The array unit adopts a microstrip patch antenna working at 10GHz, and the dynamic range of the normalized excitation amplitude of the array element is [a min ,a max ]=[0.1,1], the dynamic range of the excitation phase is [φ min ,φ max ]=[0,2π], the dynamic range of the frequency increment is [Δf min ,Δf max ]=[2kHz,10kHz], the angle and distance of the target are respectively θ 0 = 0°, R 0 =70km.

[0122] Under the above-mentioned simulation parameters, the method of the present invention is adopted to optimize the far-field power pattern of the frequency diversity conformal array, and its final normalized excitation amplitude A n The distribution of ima...

Embodiment 2

[0123] Embodiment 2: Set the array element number N=18 of frequency diversity conformal array, center frequency f 0 =10GHz, array element spacing d=0.5λ, the conformal surface is a cylindrical surface with a radius of Radius=6.67λ, λ is the wavelength of the electromagnetic wave in the air at the center frequency, The array unit adopts a microstrip patch antenna working at 10GHz, and the dynamic range of the normalized excitation amplitude of the array element is [a min ,a max ]=[0.1,1], the dynamic range of the excitation phase is [φ min ,φ max ]=[0,2π], the dynamic range of the frequency increment is [Δf min ,Δf max ]=[2kHz,15kHz], the angle and distance of target 1 are θ 1 = -30°, R 1 =50km, the angle and distance of target 2 are θ 2 = 60°, R 2 =70km.

[0124] Under the above-mentioned simulation parameters, the method of the present invention is adopted to optimize the far-field power pattern of the frequency diversity conformal array, and its final normalized ex...

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Abstract

The invention belongs to the technical field of radar antennas, and discloses a decoupling method based on a genetic algorithm for a frequency diversity conformal array distance-angle beam and an antenna. An active element pattern of a frequency diversity conformal array antenna element is extracted through full-wave electromagnetic simulation software, and a frequency diversity conformal array far-field power radiation pattern is constructed to optimize the excitation amplitude, the excitation phase and the inter-array-element frequency increment of an array element by the genetic algorithm,so that a main lobe of a frequency diversity conformal array radiation pattern is concentrated in a desired distance-angle area, and decoupling of the frequency diversity conformal array distance-angle beam is finished. Through adoption of the decoupling method, the main lobe is formed in the desired distance-angle area of the radiation pattern, and a decoupled beam of the distance-angle area is formed. The decoupling method can be used for detecting a target of the distance-angle area, and restraining interference associated with a distance.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, and in particular relates to a frequency diversity conformal array distance-angle beam decoupling method based on a genetic algorithm and a radar antenna. Background technique [0002] A conformal array antenna refers to an array antenna in which the antenna unit can be attached to the surface of the carrier and the array structure has the same or similar shape as the surface of the carrier. Conformal array antennas have the advantages of being able to realize wide-angle beam scanning, maintaining the aerodynamic characteristics of the original carrier platform, and having a low radar cross-sectional area. Therefore, they are widely used in aircraft, missiles, rockets, satellites, Carrier platforms such as ships. With the diversification of detection requirements and the development of electronic technology, conformal array antennas have become the focus of current research in the field o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06N3/12H01Q21/00
CPCG06N3/126G06F30/20H01Q21/00
Inventor 李文涛崔灿叶秀眺黑永强史小卫
Owner XIDIAN UNIV
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