A new FDFD-SIBC hybrid method for half-space ground electromagnetic scattering

Jia Zhang; Jiaqi Zhao; Zhiwei Gao; Yanjun Song

doi:10.1117/12.2668288

20 April 2023 A new FDFD-SIBC hybrid method for half-space ground electromagnetic scattering

Jia Zhang, Jiaqi Zhao, Zhiwei Gao, Yanjun Song

Proceedings Volume 12602, International Conference on Electronic Information Engineering and Computer Science (EIECS 2022); 126020O (2023) https://doi.org/10.1117/12.2668288
Event: International Conference on Electronic Information Engineering and Computer Science (EIECS 2022), 2022, Changchun, China

Abstract

At present, there is a lack of efficient numerical calculation methods for electromagnetic scattering from an infinite ground by a long duration source. Based on the two-dimensional frequency domain finite difference (FDFD) method, the surface impedance boundary conditions (SIBC) suitable for TM mode are derived, and an efficient FDFD-SIBC hybrid method is developed, which can be used to quickly calculate the ground electromagnetic scattering caused by long-term current source radiation. Firstly, the finite-size ground is intercepted and equivalent by using impedance boundary conditions to form a half-space calculation region. Then, according to the electric field component of a grid adjacent to the ground, combined with the ground reflection coefficient and the wave propagation phase delay factor, the FDFD formula of the electric field at the impedance boundary is derived. Finally, the FDFD method is used to construct the matrix equation between the electric field and the source of all grids in the half-space, and the complex conjugate gradient method is used to solve the equation to obtain the electric field distribution. The numerical simulation results of half-space ground electromagnetic scattering are in good agreement with the traditional FDTD method, which verifies the correctness of the FDFD-SIBC hybrid method.

Citation Download Citation

Jia Zhang, Jiaqi Zhao, Zhiwei Gao, and Yanjun Song "A new FDFD-SIBC hybrid method for half-space ground electromagnetic scattering", Proc. SPIE 12602, International Conference on Electronic Information Engineering and Computer Science (EIECS 2022), 126020O (20 April 2023); https://doi.org/10.1117/12.2668288

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