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Method for dividing aerial reflecting plane graticule based on structure electromagnetic coupling

A grid division and electromagnetic coupling technology, applied in the direction of antennas, electrical components, etc., to achieve the effect of solving disconnection, improving calculation speed, and accurate analysis and calculation

Inactive Publication Date: 2011-06-29
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies and defects of the prior art, and provide a grid division method for antenna reflectors based on structural electromagnetic coupling, so as to solve the gap between structural grids and electromagnetic grids in the computer-aided analysis of reflector antennas. Disconnection problem, significantly improving the accuracy and efficiency of computer-aided analysis of reflector antennas

Method used

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  • Method for dividing aerial reflecting plane graticule based on structure electromagnetic coupling
  • Method for dividing aerial reflecting plane graticule based on structure electromagnetic coupling
  • Method for dividing aerial reflecting plane graticule based on structure electromagnetic coupling

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0102] A rotating parabolic antenna with a diameter of 30m and a working frequency of 2G is used. The reflecting surface is composed of 108 rectangular panels, the reflecting surface is divided into 18 equal parts in the ring direction and 6 equal parts in the radial direction, and the focal diameter ratio is 0.5. Apply professional electromagnetic analysis software FEKO, and use physical optics method for calculation.

[0103] The structural analysis finite element model of the reflector antenna is as Figure 5 As shown, the reflective surface mesh extracted from it is as Picture 12 Shown.

[0104] Use the existing grid division method and the method of the present invention to grid the rotating parabolic antenna, and calculate its antenna pattern, such as Figure 13 , Figure 14 with Figure 15 Shown. The calculation results of the three directional patterns are compared, as shown in Table 1.

[0105] Table 1

[0106] Meshing

Corresponding pattern

Number of triangles

calcu...

example 2

[0111] A parabolic cylindrical antenna with a diameter of 4m, a width of 10m, and a working frequency of 1G is used.

[0112] The reflecting surface is composed of 160 triangular panels. The aperture direction of the reflecting surface is divided into 8 equal parts and the width direction is divided into 10 equal parts. The focal diameter ratio of the parabola is 0.5. The reflecting surface net is extracted from the structural analysis finite element model of the reflecting surface antenna. Geru Figure 16 Shown.

[0113] Apply professional FEKO software and use physical optics to calculate. Use the existing grid division method and the method of the present invention to grid the parabolic cylindrical antenna, and calculate its antenna pattern, such as Figure 17 , Figure 18 with Figure 19 Shown. The calculation results of the three directional patterns are compared, as shown in Table 2.

[0114] Table 2

[0115] Grid model

Corresponding pattern

Number of triangles

calcula...

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Abstract

The invention discloses an antenna reflector mesh generation method based on structure electromagnetic coupling which is used for solving disjunction problem of mesh generation structure and electromagnetic request in present reflector antenna analyse. The mesh generation process includes: extracting reflector mesh through reflector antenna structure analyse model; changing reflector mesh model into regular geometry image according with upper limit of reflector working frequency; selecting standard mesh form according with reflector structure, and thinning selected standard mesh according with antenna working frequency request; changing thinned mesh into reflection mesh adaptive to geometry image; sampling in corresponding geometry image by using reflection mesh, and dividing three-dimensional mesh of antenna reflector, calculating electrical property parameter of reflection antenna. The method provided by the invention not only can meta-synthetic structure analyse and electromagneticanalyse, but also can greatly increase precision and efficiency of reflection antenna electromagnetic analyse calculation, and can be used for computer aided analyse and design for reflector antenna.

Description

Technical field [0001] The invention belongs to the technical field of antennas, in particular to a structure-electromagnetic integrated grid division method of an antenna reflection surface, which is used to improve the accuracy and efficiency of the computer-aided analysis of the reflection surface antenna. Background technique [0002] In the reflector antenna, the mechanical structure is used as the carrier and boundary conditions of electromagnetic waves. Its manufacturing and assembly accuracy and deformation under various loads directly affect the antenna's gain, sidelobe level and other electrical performance indicators. The analysis and calculation of structural deformation need to establish a calculation model in combination with the specific form of the structure, the action mode of the load, and the constraint mode of the boundary. The analysis and calculation of electromagnetic fields often idealize the mechanical structure as the boundary condition in order to simpl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/16
Inventor 郑飞段宝岩李鹏宋立伟王从思
Owner XIDIAN UNIV
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