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Perfectly matched layer implementation for ADI-FDTD in dispersive media
- Source :
- Journal of Systems Engineering and Electronics. 17:80-84
- Publication Year :
- 2006
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2006.
-
Abstract
- Alternating direction implicit finite difference time domain (ADI-FDTD) method is unconditionally stable and the maximum time step is not limited by the Courant stability condition, but rather by numerical error. Compared with the conventional FDTD method, the time step of ADI-FDTD can be enlarged arbitrarily and the CPU cost can be reduced. 2D perfectly matched layer (PML) absorbing boundary condition is proposed to truncate computation space for ADI-FDTD in dispersive media using recursive convolution(RC) method and the 2D PML formulations for dispersive media are derived. ADI-FDTD formulations for dispersive media can be obtained from the simplified PML formulations. The scattering of target in dispersive soil is simulated under sine wave and Gaussian pulse excitations and numerical results of ADI-FDTD with PML are compared with FDTD. Good agreement is observed. At the same time the CPU cost for ADI-FDTD is obviously reduced.
- Subjects :
- Physics::Computational Physics
Mathematical optimization
Scattering
Computation
Mathematical analysis
Finite-difference time-domain method
Physics::Optics
Stability (probability)
Mathematics::Numerical Analysis
Alternating direction implicit method
Sine wave
Perfectly matched layer
Boundary value problem
Mathematics
Subjects
Details
- ISSN :
- 10044132
- Volume :
- 17
- Database :
- OpenAIRE
- Journal :
- Journal of Systems Engineering and Electronics
- Accession number :
- edsair.doi...........e785ff3e33cbfcf262eb00ee53225039