A Calculation Method for Optimal Matching Shaped Surface Parameters of Shaped Double Reflector Antenna

A best-fit, double-reflecting surface technology, applied in the direction of calculation, design optimization/simulation, electrical digital data processing, etc., can solve the problems of complex calculation method and unclear parameter meaning, simplify the analysis process, and simplify the geometric meaning. the effect of understanding

Active Publication Date: 2019-08-02
XIDIAN UNIV
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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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  • A Calculation Method for Optimal Matching Shaped Surface Parameters of Shaped Double Reflector Antenna
  • A Calculation Method for Optimal Matching Shaped Surface Parameters of Shaped Double Reflector Antenna
  • A Calculation Method for Optimal Matching Shaped Surface Parameters of Shaped Double Reflector Antenna

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Embodiment Construction

[0076] Such as figure 1 As shown, a method for calculating the parameters of a shaped dual reflector antenna that best matches the shaped surface includes at least:

[0077] Step 1. According to the discrete nodes of the busbar of the shaped reflector antenna, use the segmented parabolic function to coincide from the inside to the outside to obtain the bus approximation function of the shaped reflector antenna that meets the accuracy requirements, so as to determine the shape of the shaped reflector antenna at any point Unit normal vector

[0078] Obtain the coordinate values ​​of M discrete nodes of the busbar of the shaped surface, and adjust the nodes to an increasing order along the abscissa, starting from the internal point (the node close to the vertical axis), such as figure 2 The flow chart of the discrete nodes of the segmented parabola coincident with the shaped reflecting surface bus is shown in the following sequence:

[0079] (1a) Obtain the coordinate values ​​of M di...

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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, in particular to a calculation based on the matching principle of a shaped double reflector antenna feed, a secondary surface and a main surface, or a shape double reflector antenna that best matches the parameters of the shaped surface method. Background technique [0002] The reflector antenna has the advantages of simple structure, easy design and superior performance, so it is widely used in the fields of communication, radar tracking and radio astronomy. According to geometric optics, standard reflector antennas all adopt geometrical surfaces with focusing characteristics, such as parabolic main surface and hyperboloid or ellipsoidal surface. However, there is a contradiction between the uniform illumination of the aperture of the standard reflector antenna and the energy leakage at the edge, which limits the improvement of antenna efficiency. Therefore, large-scale radio t...

Claims

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Application Information

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Patent Type & Authority Patents(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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