ANALYSIS OF TF-SF BOUNDARY FOR 2D-FDTD WITH PLANE P-WAVE PROPAGATION IN LAYERED DISPERSIVE AND LOSSY MEDIA

• Published in: Electromagnetic waves (Cambridge, Mass.) Vol. 83; pp. 157 - 172
• Main Authors: Jiang, Yan-Nan, Ge, De-Biao, Ding, Shi-Jing
• Format: Journal Article
• Language: English
• Published: Cambridge Electromagnetics Academy 2008
• ISSN: 1559-8985; 1070-4698; 1559-8985
• DOI: 10.2528/PIER08042201

In the application of two-dimension (2D) finite-difference time-domain (FDTD) to scattering analysis of object embedded in layered media, the incident electromagnetic wave propagation is much more complicated, it can not inject the plane wave source by traditional method. To solve this problem, the Π-shape total-field/scatteringfield (TF-SF) boundary scheme is presented. The side TF-SF boundaries are governed by the modified 1D Maxwell's equations, but the discretization for which to p-wave is more difficult than n-wave. Then an auxiliary magnetic variable is used, which can develop the modified 1D-FDTD to p-wave without any approximately. To truncate the modified 1D-FDTD, the convolutional perfectly matched layer (CPML) absorbing boundary condition (ABC) is also given. Examples showthe feasibility and applicability of proposed Π-shape TF/SF boundaries scheme.