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Calculation method for parameter of optimally-fit shaped surface of shaped dual-reflector antenna

A best-fit, dual-reflector technology, applied in computing, electrical digital data processing, design optimization/simulation, etc., can solve problems such as unclear parameter meanings and complex calculation methods

Active Publication Date: 2016-09-07
XIDIAN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a solution to the problem that the meaning of the parameters is unclear, the calculation method is complicated, and the engineering practice mostly adopts the best matching paraboloid in the analysis method of the existing shaped double reflector antenna to best fit the shaped surface. Simple and efficient calculation and solution process, the calculation method of the best fitting shape-shaped surface parameters of the shaped double-reflector antenna

Method used

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  • Calculation method for parameter of optimally-fit shaped surface of shaped dual-reflector antenna
  • Calculation method for parameter of optimally-fit shaped surface of shaped dual-reflector antenna
  • Calculation method for parameter of optimally-fit shaped surface of shaped dual-reflector antenna

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Embodiment Construction

[0075] Such as figure 1 As shown, a method for calculating the parameters of a shaped double-reflector antenna that best fits the shaped surface includes at least:

[0076] Step 1. According to the discrete nodes of the busbar of the shaped reflector antenna, the approximation function of the busbar of the shaped reflector antenna that meets the accuracy requirements is obtained by fitting the piecewise parabolic function from the inside to the outside, so as to determine the unit normal vector;

[0077] Obtain the M discrete node coordinate values ​​of the busbar of the shaped surface, adjust the nodes to the order of increasing along the abscissa, starting from the internal point (the node close to the vertical axis), such as figure 2 As shown in the flow chart of the discrete node of the segmented parabola fitting the busbar of the shaped reflector, the segmenting process is carried out in the following order:

[0078] (1a) Obtain the coordinate values ​​of M discrete n...

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Abstract

The present invention relates to a calculation method for a parameter of an optimally-fit shaped surface of a shaped dual-reflector antenna. According to the method, a feed- subreflector- main reflector matching system of a shaped dual-reflector antenna is split into a feed- subreflector- "focal line" system and a main reflector- "focal line" system, and the two systems achieves equivalence to the original shaped dual-reflector matching system, so as to simplify a pure discussion of a main reflector actual shaped surface error problem into a discussion in the main reflector- "focal line" system, so that not only an analysis process is simplified and a geometric meaning is easy to understand; but also an object of problem researching is more targeted. According to the method, a parameter of an optimally-fit shaped surface of a shaped reflector is solved with a simple and clear idea, and a reference surface of an actual shaped reflector can be calculated by means of an optimally-fit parameter, and therefore, the method provides a reference for surface type precision description, structure shape-maintaining design, subreflector posture adjustment and active surface adjustment of large-scale shaped dual-reflector antennas, and has relatively high actual application value.

Description

technical field [0001] The invention belongs to the technical field of large-scale radio telescopes, and specifically relates to a matching principle based on a shaped double-reflector antenna feed source, a secondary surface and a main surface, or a calculation of the parameters of a shaped double-reflector antenna best matching the shaped surface method. Background technique [0002] Reflector antennas have the advantages of simple structure, easy design and superior performance, so they are widely used in the fields of communication, radar tracking and radio astronomy. According to geometric optics, standard reflector antennas use geometric surfaces with focusing characteristics, such as a parabola as the main surface and a hyperboloid or ellipsoid as the secondary surface. However, there is a contradiction between the uniform irradiation of the standard reflector antenna on the aperture and the energy leakage at the edge, which limits the improvement of the antenna effi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F30/23
Inventor 班友王从思段宝岩王伟保宏冯树飞闫永清
Owner XIDIAN UNIV
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