Multi-rotation equivalent simulation method for complex multi-target electromagnetic scattering

Abstract

The invention discloses a multi-rotation equivalent simulation method of complex multi-target electromagnetic scattering. The steps are as follows: establish the grid model of each sub-objective, and obtain the corresponding sub-area; in the corresponding local coordinate system of each sub-area, determine the transfer matrix between the spherical surface and the cylindrical surface based on the basis function of the rotationally symmetric body, and the cylindrical surface and the The scattering matrix based on the quadrilateral high-order stack basis function and the triangular RWG basis function between the sub-targets inside the cylinder; determine the transmission matrix between the spherical surfaces based on the rotationally symmetric body basis function, and the transmission matrix based on the curved quadrilateral high-order stack basis function Coefficient transformation matrix, coefficient transformation matrix based on rotationally symmetric basis functions, find the corresponding relationship between the surface quadrilateral number on the cylinder and the bus segment number; set the excitation source, and the incident wave is a uniform plane wave; determine the equivalent on the spherical surface of each sub-region Electromagnetic flow, and finally get the radar cross-section area. The invention can efficiently analyze the electromagnetic scattering of complex multi-targets, and has great significance.

Description

Multi-rotation equivalent simulation method for complex multi-target electromagnetic scattering technical field The invention relates to the technical field of electromagnetic simulation, in particular to a multi-rotation equivalent simulation method for complex multi-target electromagnetic scattering. Background technique In practical engineering, it is often necessary to analyze complex multi-target electromagnetic scattering problems, such as missile groups. Rapid analysis and calculation of the electromagnetic scattering of these multiple targets is an important research direction in the fields of radar detection and target recognition. The moment method of rotationally symmetric bodies (M.Andreasen, "Scattering from bodies of revolution," Antennas and Propagation, IEEE Transactions on, vol.13, pp.409-418, 1965.) can efficiently analyze the Electromagnetic scattering, compared to traditional RWG-based basis functions (Rao, S.Wilton and D.Glisson, A., "Electromagnetic ...

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Problems solved by technology

However, it is difficult to generate irregular model grids, and the matrix performance is poor

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