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Prediction method of antenna pattern disturbance on electrically large platform

A technology of antenna pattern and electric large platform, which is applied in the fields of electric digital data processing, instrumentation, calculation, etc., can solve the problems such as the decrease of calculation accuracy, and achieve the effect of large grid size, high calculation accuracy and saving calculation resources

Inactive Publication Date: 2015-09-23
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0004] (1) Although the existing hybrid method can quickly calculate the disturbed pattern of the antenna, the calculation accuracy is reduced

Method used

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  • Prediction method of antenna pattern disturbance on electrically large platform
  • Prediction method of antenna pattern disturbance on electrically large platform
  • Prediction method of antenna pattern disturbance on electrically large platform

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0016] The first step is to set the antenna operating frequency f, establish the geometric model of the antenna and the TVU platform, and divide the model into a curved triangular mesh;

[0017] The wavelength corresponding to the operating frequency f of the antenna is λ=c / f, and c is the speed of light. The geometric model of the antenna and the TV large platform is established in the commercial software Ansys, and the model is divided into a curved triangular mesh. The average division size of the antenna is 0.1λ, the average subdivision size of the TVU platform is 0.5λ-0.9λ, and the grid subdivision results are as follows figure 1 shown;

[0018] In the second step, the EFIE equation is established according to the boundary conditions, and the induced current on the surface of the antenna and the electric large platform is expressed as a combination of p...

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Abstract

The present invention discloses a prediction method of antenna pattern disturbances on an electrically large platform. Firstly, a geometrical model of an antenna and an electrically large platform is established and grid division is performed on the model; secondly, an electric field integral equation is established according to boundary conditions, antenna and electrically large platform surface sensing current is represent by a spherical wave phase primary function, the electric field integral equation is tested through a galerkin approach to obtain a matrix equation system, solving the matrix equation system to obtain a current expansion coefficient; and ultimately, calculating a disturbance pattern of the antenna. With adoption of the prediction method, division grids of the electrically large platform and the antenna structure can be greatly reduced, thereby saving computing resources.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a prediction method for antenna pattern disturbance on a radio and television platform, which can be used to quickly calculate the antenna disturbance pattern on a radio and television platform. Background technique [0002] The problem of electromagnetic radiation and electromagnetic compatibility of platform antennas with electrically large size (the size of the object is large relative to the electrical wavelength) is of great significance in practical applications. The methods for analyzing this problem in the frequency domain mainly include high and low frequency mixed methods and precise numerical methods. The high and low frequency hybrid methods include method of moment and hybrid method of geometric diffraction (MoM-UTD), method of moment and hybrid method of physical optics (MoM-PO). In these methods, the antenna part is solved by the method of moments (MoM), and the ...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 陈如山樊振宏丁大志安玉元
Owner NANJING UNIV OF SCI & TECH
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