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Analysis Method of Random Errors on Reflector Antenna Surface Based on Second-Order Approximation Formula

A random error and approximate formula technology, applied in geometric CAD, design optimization/simulation, special data processing applications, etc., can solve the problems of inability to accurately obtain the upper and lower limits of the power pattern, weak dependence of interval analysis and interval amplification, and difficulty in forming fast Analysis and other issues to achieve the effect of avoiding interval expansion, avoiding formula derivation, and ensuring accuracy

Active Publication Date: 2021-02-05
XIDIAN UNIV
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Problems solved by technology

Since the existing methods all introduce the surface error into the calculation of electrical properties in the form of phase error, it is cumbersome and time-consuming in the derivation of the formula, and it is difficult to form the purpose of rapid analysis
P.Rocca, N.Anselmi, A.Massa et al. disclosed a method based on Due to the weak dependence of interval analysis and the defect of interval amplification, this method cannot accurately obtain the upper and lower limits of the power pattern

Method used

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  • Analysis Method of Random Errors on Reflector Antenna Surface Based on Second-Order Approximation Formula
  • Analysis Method of Random Errors on Reflector Antenna Surface Based on Second-Order Approximation Formula
  • Analysis Method of Random Errors on Reflector Antenna Surface Based on Second-Order Approximation Formula

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Embodiment Construction

[0061] Attached below figure 1 , the specific embodiment of the present invention is described in further detail:

[0062] The invention provides a method for analyzing random errors on the surface of a reflector antenna based on a second-order approximation formula, comprising the following steps:

[0063] Step 1, input the geometric parameters and electrical parameters of the reflector antenna provided by the user; the geometric parameters include radius and focal length; the electrical parameters include operating wavelength, aperture field amplitude distribution function, cone pin level, aperture field shape index and antenna gain, Electrical performance requirements including lobe width, side lobe level and pointing accuracy;

[0064] Step 2, according to the geometric parameters of the antenna provided by the user, the aperture surface of the reflector is divided into N segments according to the radial direction, where N is the number of rings divided by the input apert...

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Abstract

The invention discloses a method for analyzing random errors on the surface of a reflective surface antenna based on a second-order approximate formula, which includes: inputting the geometric parameters and electrical parameters of the reflective surface antenna; Far zone radiation electric field within each ring aperture; calculation of far zone radiation electric field between rings; calculation of ideal far zone radiation power; calculation of ideal far zone radiation power square value; calculation of radiation power average; calculation of radiation power variance; calculation of radiation power Extreme value; judging whether the electrical performance meets the requirements; output radiation power pattern; updating the root mean square value of the surface random error. Based on the second-order approximation formula, the invention obtains the influence of the random error on the surface of the reflector antenna on the electrical performance from the perspective of probability, and can guide the processing and manufacturing of the reflector antenna panel.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, in particular to a random error analysis method on the surface of a reflective surface antenna based on a second-order approximate formula in the field of radar antennas. Background technique [0002] Reflector antennas are widely used in radio astronomy, radar, communication, detection and other fields. Reflector antennas are susceptible to systematic errors caused by external loads and random errors introduced by processing, manufacturing and installation, resulting in deterioration of the electrical performance of the antenna. The surface random error is mainly introduced by the panel manufacturing process, which is an important aspect that affects the electrical performance of the antenna, especially the sidelobe performance. Therefore, it is necessary to conduct research on the influence of random errors on the surface of the antenna on the electrical performance, so as to guide the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F30/17
CPCG06F30/17G06F30/20
Inventor 张树新张顺吉段宝岩张逸群李鹏杜敬利宋立伟杨东武
Owner XIDIAN UNIV
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