基于矩阵降维的MoM-PO电磁散射混合算法

doi:10.12305/j.issn.1001-506X.2023.08.11

Abstract

Abstract:

A hybrid algorithm based on matrix dimension reduction is proposed to calculate the electromagnetic scattering problem of electrically large targets with fine structures. Using the Rao-Wilton-G1isson (RWG) basis function, this method divides the target area based on method of moments (MoM), so as to divide the impedance matrix into blocks and separate the unknown values. The coupling transfer matrix and excitation transfer matrix are constructed from the current interaction between the moment region and the physical optics (PO) region, and the linear relationship between the unknown values in the two regions is established, thereby completing the dimension reduction of impedance matrix. Finally, a MoM-PO hybrid algorithm is constructed from the perspective of matrix operation. The equivalent electric dipole model is used to simplify the double integral calculation and further reduce the calculation amount of matrix elements. In the end, the order of impedance matrix is greatly reduced, avoiding the calculation of large-scale matrix equation. Numerical results show that compared with the traditional low-frequency algorithm, the proposed algorithm not only ensures the computational accuracy but also improves the computational efficiency.

Key words: method of moments (MoM), physical optic (PO), matrix dimension reduction (MDR), hybrid algorithm, electric dipole

CLC Number:

O0441.4

Jianzhou LI, Haixuan ZHANG, Shuhui CHEN. Hybrid algorithm of MoM-PO for electromagnetic scattering based on matrix dimension reduction[J]. Systems Engineering and Electronics, 2023, 45(8): 2377-2382.

Figures/Tables 5

References 31

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Hybrid algorithm of MoM-PO for electromagnetic scattering based on matrix dimension reduction

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