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Method for dividing electromechanical synthetic graticule of double-reflecting plane antenna system

A dual-reflector, meshing technology, applied in antennas, electrical components, electrical digital data processing, etc., can solve the problems of disconnection between structural meshes and electromagnetic meshes, inconsistent division forms, etc., to achieve uniform form and size, The effect of accurate electromagnetic analysis and calculation, improving precision and efficiency

Inactive Publication Date: 2010-08-04
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of electromechanical comprehensive grid division method of double reflector antenna system, to solve the gap between structural grid and electromagnetic grid in computer aided analysis of double reflector antenna Disconnection, and the problem of inconsistent grid division of the main surface, secondary surface and feed source, to improve the accuracy and efficiency of computer-aided analysis of dual-reflector antennas

Method used

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  • Method for dividing electromechanical synthetic graticule of double-reflecting plane antenna system
  • Method for dividing electromechanical synthetic graticule of double-reflecting plane antenna system
  • Method for dividing electromechanical synthetic graticule of double-reflecting plane antenna system

Examples

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Effect test

example 1

[0117] Carl's double-reflector antenna with a diameter of 10m and a working frequency of 2G is used, and the focal-diameter ratio is 0.5; the main reflector is composed of 384 fan-shaped panels, and the reflector is divided into 48 in the circular direction and 8 in the radial direction; the secondary reflector is composed of 24 Composed of a fan-shaped panel, the reflective surface is divided into 12 equal parts in the circumferential direction and 2 equal parts in the radial direction; the horn feed is used. Application of professional electromagnetic analysis software FEKO calculation.

[0118] Use the existing grid division method and the method of the present invention to carry out grid division to this Karl's double-reflector antenna respectively, and calculate its antenna pattern, as Figure 11 , Figure 12 and Figure 13 shown. The calculation results of the three orientation diagrams are compared, as shown in Table 1.

[0119] Table 1

[0120] meshing

...

example 2

[0124] Carl's double-reflector antenna with a diameter of 20m and a working frequency of 1G is used, with a semicircular structure and a focal-diameter ratio of 0.4; the main reflector is composed of 4096 fan-shaped panels, and the reflector is divided into 128 equal parts in the circular direction and 32 equal parts in the radial direction; The sub-reflecting surface is composed of 256 fan-shaped panels, the reflecting surface is divided into 32 equal parts in the circumferential direction and 8 equal parts in the radial direction; the feed source of the pyramid horn is adopted. Apply the professional electromagnetic analysis software FEKO, and use the physical optics method for calculation. The simplified finite element model of the main surface, secondary surface and feed of the antenna is as follows Figure 14 As shown, the corresponding extracted grid is as Figure 15 As shown in a, b, and c, the corresponding fine mesh is as follows Figure 16 Shown in a, b, c.

[012...

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Abstract

The invention discloses a electromechanical comprehensive mesh generation method for dual-reflector antenna system, comprising: extracting mesh information of a main reflector, a sub-reflector and a feed source from the structure analyzing model of a dual-reflector antenna; converting a mesh into a regular depths image according to the upper limit of the working frequency of the antenna; selecting a standard mesh form according to the structural forms of the main reflector, the sub-reflector and the feed source, and evenly thinning; obtaining a mapping mesh corresponding to the depth image bythe conversion of mass centric coordinates; and sampling on the depth image by the mapping mesh to form a three-dimensional mash of the main reflector, the sub-reflector and the feed source for the dual-reflector antenna, which is used for electromagnetic analysis and calculation. The method not only solves the problem that mesh generation requirements of dual-reflector antenna structure and electromagnetic analysis disjoint, but also the problem that the forms of a main reflector, a sub-reflector and a feedback source are not unified; besides, the accuracy and efficiency of electromagnetic analysis are improved, and the method can be used for computer aided analysis and design of dual-reflector antennae.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a grid division method for a double-reflector antenna system, which is used to improve the accuracy and efficiency of computer-aided analysis of the double-reflector antenna. Background technique [0002] The dual reflector antenna is one of the most widely used forms of reflector antenna due to its advantages of reducing feed source shading and feeder loss, improving servo performance and so on. Since the antenna is an electromechanical integrated product, the mechanical structure directly affects the electromagnetic characteristics, especially for large-diameter high-frequency antennas, the electromagnetic performance is more sensitive to the structure. In traditional analysis, structural analysis and electromagnetic analysis are performed separately, and the grid division required for the analysis model is also relatively independent and disjointed. For the main surface, sec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q19/10H01Q15/14G06F17/50
Inventor 郑飞李鹏段宝岩宋立伟王从思杜李刚
Owner XIDIAN UNIV
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