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Method for rapidly extracting electrical property parameter of metal truss-type radome

A metal extraction, truss-type technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of modeling differences, large amount of calculation, calculation results and accurate numerical methods cannot be compared, and achieve Ease of comparison, model-accurate effects

Active Publication Date: 2015-07-01
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0006] (1) The modeling of the metal truss is too simple, ignoring the influence of the connection of the metal truss
[0007] (2) Computational results and precise numerical methods cannot be compared due to modeling differences
[0008] (3) For non-cylindrical metal trusses, it is necessary to use numerical methods to calculate the induced current rate, which requires a large amount of calculation

Method used

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  • Method for rapidly extracting electrical property parameter of metal truss-type radome
  • Method for rapidly extracting electrical property parameter of metal truss-type radome
  • Method for rapidly extracting electrical property parameter of metal truss-type radome

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] Such as figure 1 Shown is a flow chart of a method for quickly extracting electrical performance parameters of a metal truss radome.

[0031] The first step is to set the antenna operating frequency f, establish the geometric model of the antenna equivalent aperture surface, metal truss, and dielectric skin, and divide the model into meshes. Due to the complex structure of the radar antenna, the equivalent aperture surface can be used instead of the radar antenna. The metal truss and the dielectric skin are the components of the metal truss radome. The metal truss is mainly used to support the dielectric skin, and the dielectric skin is mainly used to protect the radar antenna.

[0032] The wavelength corresponding to the operating frequency f of the antenna is λ=c / f, and c is the speed of light. In the commercial software Ansys, a circle with the co...

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Abstract

The invention discloses a method for rapidly extracting the electrical property parameter of a metal truss-type radome. The method includes: building geometric models of the antenna equivalent aperture, the metal truss and the medium skin firstly; then calculating the magnetic field of the metal truss surface through the formula of Stratton-Chu and the induced current of the metal truss light area through the physical optical method; calculating the incident electric field and the magnetic field of any point on the medium skin inner surface through the formula of the Stratton-Chu and the transmission coefficient of the point, obtaining the electric field and the magnetic field of the skin outer surface according to the incident electric field and the magnetic field, and calculating the equivalent current and magnetic current of the outer surface; and respectively calculating the induced current of the metal truss and the far field of the induction electromagnetic current on the medium skin outer surface in the observing direction, calculating the gain pattern and obtaining the electrical property parameter of the metal truss-type radome. Compare with the prior art, the method for rapidly extracting the electric property parameter of the metal truss-type radome has the advantages of being high in precision and calculating speed.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, in particular to a method for quickly extracting electrical performance parameters of a metal truss type radome, which can be used to predict the electrical performance of a metal truss and a dielectric skin radome. Background technique [0002] As an important part of the radar system, the radome provides an all-weather working environment for the radar antenna. The design of the radome needs to achieve good mechanical properties and electrical performance indicators. In order to meet the mechanical performance index, large-scale radome generally adopts metal truss and dielectric skin composite structure. [0003] Usually the radar antenna works in a higher frequency band, and the size of the radome is larger, which brings greater difficulty to the analysis problem. For example, a radome with a diameter of 20m will reach more than 2800 electrical wavelengths in the Ka band. The precise n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 陈如山樊振宏丁大志安玉元
Owner NANJING UNIV OF SCI & TECH
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