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Large deformation array antenna sidelobe performance prediction method based on array element mutual coupling

An array antenna, performance prediction technology, applied in special data processing applications, instruments, electrical digital data processing and other directions, can solve the problems of limited application scope, difficult structural deformation, and difficult to promote.

Active Publication Date: 2014-09-10
XIDIAN UNIV
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Problems solved by technology

This method only assumes that the front deformation satisfies a specific law, but it is difficult to give the structural deformation with a specific function in practice, which limits its application range in engineering and is difficult to promote

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  • Large deformation array antenna sidelobe performance prediction method based on array element mutual coupling
  • Large deformation array antenna sidelobe performance prediction method based on array element mutual coupling
  • Large deformation array antenna sidelobe performance prediction method based on array element mutual coupling

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Embodiment Construction

[0068] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0069] refer to figure 1 As shown, the present invention is a large-scale array antenna sidelobe performance prediction method based on mutual coupling of array elements, and the steps are as follows:

[0070] Step 1, establish the structural finite element model of the array antenna.

[0071] According to the given structural parameters and material properties of the array element, T / R component, cold plate and array frame, the structural finite element model of the array antenna is determined, where the material properties include elastic modulus, Poisson's ratio and density.

[0072] Step 2: Analyze the finite element model to obtain the position offset of the array element after the deformation of the array.

[0073] (2a) Given the constraints of the finite element model of the array antenna structure and the power spectrum of the airborne random ...

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Abstract

The invention discloses a large deformation array antenna sidelobe performance prediction method based on array element mutual coupling. The method includes determining an array antenna structural finite element model according to structural parameters and material attributes of an array antenna; performing structural finite element analysis through finite element software, acquiring the position offsets of array elements in fronts after the array antenna is deformed, and determining new coordinates of the array elements; dividing the array antenna in to sub arrays in a staggered manner, and establishing the mutual coupling parameter matrix of the entire deformed array antenna through the mutual coupling parameter matrix of the sub arrays; according to the position offsets and mutual coupling parameters of the array elements, and utilizing an array antenna electromechanical coupling module to calculate the antenna far-zone electric field distribution; according to an array antenna far-zone electric field value, establishing a relationship between a power pattern extreme value and an array element amplitude phase, calculating the antenna sidelobe level, and implementing fast prediction of the array antenna sidelobe performance. The method can be applied to antenna structural design guidance and array antenna sidelobe performance analysis and evaluation.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, and in particular relates to a method for predicting sidelobe performance of a large-scale deformed array antenna based on mutual coupling of array elements, which can be used to guide the structure design of the array antenna and the simulation analysis and evaluation of the sidelobe performance. Background technique [0002] Array antennas have been widely used in various radar systems due to their unparalleled advantages such as high reliability, multiple functions, and good stealth performance. With the development of military technology in the world, the radar system must be able to have stronger anti-electronic interference, anti-radiation missile, anti-radar detection, anti-high-speed anti-ship missile low-altitude and ultra-low-altitude strike capabilities. The antenna sidelobe performance is closely related to radar tactics and technical indicators, which to a large extent determi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 王从思康明魁段宝岩黄进王伟王猛宋立伟李鹏王伟锋王艳
Owner XIDIAN UNIV
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