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Electrical property prediction method of offset reflector antenna based on electromechanical coupling model

A technology for electromechanical coupling and performance prediction, applied in the field of antennas

Inactive Publication Date: 2012-11-21
XIDIAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to ignore the coupling relationship between the structural displacement field and the electromagnetic field in the existing offset reflector antenna analysis technology, and consider the influence of one aspect alone, which leads to the failure of the offset parabolic antenna structure and thermal design. electrical separation

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  • Electrical property prediction method of offset reflector antenna based on electromechanical coupling model
  • Electrical property prediction method of offset reflector antenna based on electromechanical coupling model
  • Electrical property prediction method of offset reflector antenna based on electromechanical coupling model

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Embodiment Construction

[0059] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0060] refer to figure 1 As shown, the present invention is based on the electromechanical coupling model of the bias reflector antenna electrical performance prediction method, the steps are as follows:

[0061] Step 1: Establish an antenna finite element model in I-DEAS

[0062] According to the structural parameters and material properties of the offset reflector antenna, the geometric model of the antenna is determined. The structural parameters of the offset reflector antenna include antenna diameter D, focal length f, offset height H, and parent paraboloid diameter D p and focal diameter ratio F / D p ; Material properties for biased reflector antennas include density, thermal conductivity, specific heat, Poisson's ratio, modulus of elasticity, coefficient of thermal expansion, absorptivity, and emissivity. Offset reflector antenna structure see...

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Abstract

The invention discloses an electrical property prediction method of an offset reflector antenna based on an electromechanical coupling model. The electrical property prediction method comprises the steps of: 1) establishing an antenna finite element model in I-DEAS; 2) analyzing in the I-DEAS to obtain the temperature distribution of each node of the finite element model of the offset reflector antenna; 3) reading a finite element model file in an Ansys file and computing structural deformation caused by temperature; 4) computing items of influence caused by reflector errors and feed source errors of the offset reflector antenna to aperture field amplitude-phase of the antenna; 5) computing the electrical property of the offset reflector antenna; and 6) judging whether design requirements are satisfied. The electrical property prediction method of the offset reflector antenna based on the electromechanical coupling model has the advantages that the influence of temperature on the structure of the offset reflector antenna can be accurately analyzed and the structural field and electromagnetic field coupling analysis of the offset reflector antenna is realized; and the influence of various structural errors to the working performance of the antenna is analyzed, the major structural factors can be found out, the reasonable requirement on structural precision can be given out according to actual demands, the development cycle is shortened and the development cost is reduced.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a method for predicting the electrical performance of an offset reflector antenna based on an electromechanical coupling model. Background technique [0002] Offset Reflector Antennas are widely used in various radars such as mobile communication satellites, high-power microwave weapons, and search and reconnaissance. When the working frequency band is high, structural factors have a great influence on the radiation performance of the antenna. The demand for low sidelobes brought about by the application of large deployable film or cable-net offset parabolic antennas requires the accurate calculation of the influence of surface errors on antenna sidelobes. The structural factors affecting the electrical performance of the biased parabolic antenna mainly include the surface error of the reflector and the error of the feed source. The surface error of the reflective surface incl...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 王从思徐慧娟李兆段宝岩康明魁王伟黄进保宏
Owner XIDIAN UNIV
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