Method for rapidly calculating electromagnetic scattering characteristics of electrically large targets

A technology of target electromagnetic scattering and electrical large size, which is applied in computing, electrical digital data processing, special data processing applications, etc. It can solve the problem of time-consuming electromagnetic scattering calculations, achieve clear physical concepts, save storage space, and high code portability. Effect

Inactive Publication Date: 2017-03-22
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

When the method utilizes the sparse property of the method of moments to carry out matrix compression calculations, the calculation of electromagnetic scattering for strong mutual coupling is more time-consuming

Method used

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  • Method for rapidly calculating electromagnetic scattering characteristics of electrically large targets
  • Method for rapidly calculating electromagnetic scattering characteristics of electrically large targets
  • Method for rapidly calculating electromagnetic scattering characteristics of electrically large targets

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Embodiment Construction

[0028] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0029] S1. Obtain the geometric shape data of the target through surveying and mapping. The target size is: 2.4m×1.8m×0.2m, the incident electromagnetic wave frequency is 10GHz, and the target size is 80 electrical wavelengths. The incident angle is (theta,phi)=(60°,0°), vertically polarized excitation, such as figure 2 shown. Describe the induced electromagnetic field distribution of the electromagnetic current on the target.

[0030] S2. Establish a local RWG basis function on the small triangle patch of the target. The number of triangle patch units is 470870. Each RWG basis function is defined on the common side of adjacent triangles and has specific values ​​only in adjacent triangles. , and zero elsewhere.

[0031]

[0032] Among them, r is the position vector inside the triangle patch, ρ is the posi...

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Abstract

The invention discloses a method for rapidly calculating electromagnetic scattering characteristics of electrically large targets. The method comprises the following steps of: completing coupling areas of different facets under excitation of an incident electromagnetic field by utilizing ray tracking; filling an impedance matrix in nearby sub-areas and of the coupling areas by using a moment method; and carrying out zero setting on the impedance matrix in non-nearby sub-areas and non-coupling areas. The number of nearby group primary functions of each chip unit and the number of primary functions of the coupling areas are relatively small, so that the rarefaction degree of the whole impedance matrix is high and the internal memory space and computation time are greatly saved. The method disclosed by the invention is strong in adaptability and high in computation precision, and has the effect of greatly improving efficiency of computing the electrically large targets by using the moment method.

Description

technical field [0001] The invention relates to a fast calculation technology of target electromagnetic scattering characteristics, in particular to a method for fast calculation of electromagnetic scattering characteristics of an electrically large-sized target. Background technique [0002] In recent years, the analysis of the electromagnetic scattering characteristics of three-dimensional electrically large objects with arbitrary shapes has attracted more and more attention from domestic and foreign scholars. Its applications are mainly manifested in: radar system design and target recognition, stealth and anti-stealth technology of military weapons, electromagnetic compatibility in complex environments, etc. Carrying out rapid calculation of electromagnetic scattering characteristics of electrically large targets has always been a common concern in radar overall design and stealth and anti-stealth engineering design. At present, the methods for analyzing the scattering ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/00
Inventor 郭良帅梁子长高鹏程林云
Owner SHANGHAI RADIO EQUIP RES INST
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