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논문 기본 정보

자료유형
학술저널
저자정보
Seung Mo Seo (Agency for Defense Development)
저널정보
한국전자파학회JEES Journal of Electromagnetic Engineering And Science Journal of Electromagnetic Engineering And Science Vol.19 No.1
발행연도
2019.1
수록면
6 - 12 (7page)

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An IE-FFT algorithm is implemented and applied to the electromagnetic (EM) solution of perfect electric conducting (PEC) scattering problems. The solution of the method of moments (MoM), based on the magnetic field integral equation (MFIE), is obtained for PEC objects with closed surfaces. The IE-FFT algorithm uses a uniform Cartesian grid to apply a global fast Fourier transform (FFT), which leads to significantly reduce memory requirement and speed up CPU with an iterative solver. The IE-FFT algorithm utilizes two discretizations, one for the unknown induced surface current on the planar triangular patches of 3D arbitrary geometries and the other on a uniform Cartesian grid for interpolating the free-space Green’s function. The uniform interpolation of the Green’s functions allows for a global FFT for far-field interaction terms, and the near-field interaction terms should be adequately corrected. A 3D block-Toeplitz structure for the Lagrangian interpolation of the Green’s function is proposed. The MFIE formulation with the IE-FFT algorithm, without the help of a preconditioner, is converged in certain iterations with a generalized minimal residual (GMRES) method. The complexity of the IE-FFT is found to be approximately 𝑂(𝑁<SUP>1.5</SUP>) and 𝑂(𝑁<SUP>1.5</SUP>log𝑁) for memory requirements and CPU time, respectively.

목차

Abstract
Ⅰ. INTRODUCTION
Ⅱ. MFIE FORMULATION
Ⅲ. IE-FFT ALGORITHM
Ⅳ. NUMERICAL RESULTS
Ⅴ. CONCLUSION
REFERENCES

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