Rotational symmetric body electromagnetic scattering property simulation method based on matrix nest compression

A technology with electromagnetic scattering characteristics and rotational symmetry, which is applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as divergence, and achieve the effects of controllable calculation accuracy, accelerated speed, and simple construction method.

Active Publication Date: 2013-09-04
NANJING UNIV OF SCI & TECH
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Problems solved by technology

Document 1 (Y.Wen Ming, et al., "Closed Form Modal Green's Functions for Accelerated Computation of Bodies of Revolution," Antennas and Propagation, IEEE Transactions on, vol.56, pp.3452-3461, 2008.) uses closed Calculation of rotat

Method used

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  • Rotational symmetric body electromagnetic scattering property simulation method based on matrix nest compression
  • Rotational symmetric body electromagnetic scattering property simulation method based on matrix nest compression
  • Rotational symmetric body electromagnetic scattering property simulation method based on matrix nest compression

Examples

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Example Embodiment

[0100] Example 1

[0101] According to the method of the present invention, a metal cylinder with a radius of 1 m and a height of 20 m is simulated. The frequency of the incident wave is 3GHz, the incident angle is (40°, 0°), a total of 43 modes are required, and the number of bus division line segments is 2200. The result is in good agreement with the original rotational symmetry algorithm, which proves the correctness of the method, such as Figure 5 Shown. The present invention also shows the changes in time consumption and memory consumption of the present invention. Table 1 shows the comparison between the calculation efficiency in Example 1 and the traditional method. From the table, it can be seen that the memory consumption and calculation time are both higher than the traditional method. It saves.

[0102] Table 1

[0103] Method

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Abstract

The invention discloses a rotational symmetric body electromagnetic scattering property simulation method based on matrix nest compression. The method includes the following steps: building a generatrix of a rotational symmetric body, performing subdividing and discretization to obtain subdivided line segments, establishing a binary tree grouping relation among the subdivided line segments, establishing an index relation between a near-field group and a far-field group, establishing an electric field integral equation of the rotational symmetric body, determining a simulating vector and the total number of modes, breaking every thinnest-layer far-field group mode impedance matrix into two strip-shaped matrixes to be stored respectively with a matrix extraction method, dividing the far-field group impedance matrixes into parent layer near fields and parent layer far fields through the index of layers, performing nest processing layer by layer, breaking each far-field impedance matrix into small matrixes, sequentially determining mode impedance matrixes of all the modes, solving the equations of the mode impedance matrixes one by one, calculating and obtaining far-field information according to the reciprocal theorem to complete the simulation. The method is low in memory consumption, high in equation iteration speed, and capable of efficiently simulating electromagnetic scattering properties of the rotational symmetric body in a large size.

Description

technical field [0001] The invention relates to electromagnetic simulation technology, in particular to a method for simulating electromagnetic scattering characteristics of a rotationally symmetrical body based on matrix nesting compression. Background technique [0002] A rotationally symmetric body is an object that can be obtained by rotating a generatrix around a fixed axis. As an important class of radar targets, such as missile body and radome, people have done quite a lot of research on their electromagnetic scattering characteristics. Especially in tracking and identifying space targets, the electromagnetic scattering analysis of rotating bodies plays an important role. It has always been an important subject in the research of electromagnetic scattering to analyze and study the electromagnetic scattering of various rotating bodies by using the method of rotationally symmetric moments. [0003] Andreasen, M.G first proposed the rotationally symmetric moment method...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 陈如山丁大志樊振宏苏婷陶诗飞沙侃叶晓东査丽萍李士东
Owner NANJING UNIV OF SCI & TECH
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