Moving-window propagation model based on an unconditionally stable FDTD method

This work introduces a finite-difference time-domain (FDTD) propagation model based on a moving window algorithm. The FDTD is evaluated by an unconditionally stable (US) method combined with a material independent (MI) perfectly matched layer (PML) formulation. Thus, the time step used in simulation...

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Bibliographic Details
Main Authors: Batista, C. G., Goncalves do Rego, Cassio
Format: Conference Proceeding
Language:English
Subjects:
Computational modeling
Equations
Finite difference methods
Materials
Mathematical model
Moment methods
Time domain analysis
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Summary:This work introduces a finite-difference time-domain (FDTD) propagation model based on a moving window algorithm. The FDTD is evaluated by an unconditionally stable (US) method combined with a material independent (MI) perfectly matched layer (PML) formulation. Thus, the time step used in simulation is no longer restricted by the Courant-Friedrich-Levy (CFL) stability condition and the formulation can be efficiently applied to any real propagation scenario without any modification. The US-IPML formulation is tested through an analytic problem. The proposed propagation model is applied to two idealized terrain profiles involving HF and VHF signals.
ISSN:2164-3342
DOI:10.1109/EuCAP.2012.6206374