Open AccessDiscrete Green's function approach to disjoint domain simulations in 3D FDTD method
Author(s) -
Stefański T.P.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2012.4462
Subject(s) - finite difference time domain method , disjoint sets , function (biology) , green's function , domain (mathematical analysis) , computer science , mathematics , algorithm , electronic engineering , physics , mathematical analysis , engineering , optics , evolutionary biology , biology
A discrete Green's function (DGF) approach to couple 3D FDTD subdomains is developed. The total‐field/scattered‐field subdomains are simulated using the explicit FDTD method whilst interaction between them is computed as a convolution of the DGF with equivalent current sources measured over Huygens surfaces. In the developed method, the DGF waveforms are truncated using the Hann's window. The error varies in the range − 65 to − 40 dB depending on the DGF length and positions of the subdomains. However, if the DGF length is equal to the number of iterations in a simulation, this approach returns the same results as the direct FDTD method.