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Accuracy of the Discrete Green's Function Formulation of the FDTD Method

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This paper reports an evaluation of the accuracy of the discrete Greens function (DGF) formulation of the finite-difference time-domain (FDTD) method. Recently, the closed-form expression for the DGF and its efficient numerical implementation were presented, which facilitates applications of the DGF in FDTD simulations of radiation and scattering problems. So far, the accuracy of the DGF formulation of the FDTD method has been rather marginally treated in the literature. Moreover, although windowing has been reported as an efficient method of DGF waveform truncation and a remedy for stability issues, the accuracy and usability of this technique has not yet been fully evaluated. In this paper, previously unrevealed accuracy limitations of the DGF formulation of the FDTD method are demonstrated in several numerical tests. Specifically, the truncation errors are compared for the most frequently applied windowing functions, with the best performance shown for the Hann's window.

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION nr 61, strony 829 - 835,
ISSN: 0018-926X
Język:
angielski
Rok wydania:
2013
Opis bibliograficzny:
Stefański T.: Accuracy of the Discrete Green's Function Formulation of the FDTD Method// IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION. -Vol. 61, nr. 2 (2013), s.829-835
Weryfikacja:
Politechnika Gdańska

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