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

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...

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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 rotationally symmetric bodies accelerated by the formula mode Green's function is a commonly used method to overcome integral oscillations, but this method will diverge when analyzing electrically large-sized rotationally symmetric bodies

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