Title :
Non-Reflecting SFBF Termination Inverting From TFSF Discontinuity Decomposition
Author_Institution :
Electr. & Comput. Eng., Duke Univ., Durham, UK
Abstract :
This paper presents a scattering termination using a perfectly non-reflecting scattering-field boundary-field (SFBF) decomposition equivalent to the total field scattered field in principle. Unlike Dirichlet-to-Neumann mapping techniques, local space-time evaluation is achieved by invoking one-sided differential definition directly operating on Maxwell equations. Efficient bilateral implementation is also developed to avoid solving higher order paraxial difference equations. Numerical results show the SFBF has a better early-time and evanescent wave termination accuracy than the convolution perfectly matched layer.
Keywords :
Maxwell equations; approximation theory; differential equations; electromagnetic wave scattering; finite difference time-domain analysis; Maxwell equations; TFSF discontinuity decomposition; early-time wave termination accuracy; efficient bilateral implementation; evanescent wave termination accuracy; local space-time evaluation; nonreflecting SFBF termination; nonreflecting scattering-field boundary-field decomposition; one-sided differential definition; paraxial approximation; scattering termination; total field scattered field; Approximation methods; Finite difference methods; Magnetic resonance imaging; Nonhomogeneous media; Perfectly matched layers; Scattering; Time-domain analysis; Dirichlet–Neumann (DN) boundaries; domain decomposition; finite difference time domain (FDTD); paraxial approximation; perfectly matched layer (PML);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2015.2455033
