Title :
Moving-window propagation model based on an unconditionally stable FDTD method
Author :
Batista, Cláudio Garcia ; Rego, Cássio Gonçalves do
Author_Institution :
Grad. Program in Electr. Eng., Fed. Univ. of Minas Gerais, Belo Horizonte, Brazil
Abstract :
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.
Keywords :
HF radio propagation; VHF radio propagation; finite difference time-domain analysis; Courant-Friedrich-Levy stability condition; HF signals; VHF signal; finite-difference time-domain propagation model; material independent perfectly matched layer formulation; moving-window propagation model; terrain profiles; unconditionally stable FDTD method; unconditionally stable method; Computational modeling; Equations; Finite difference methods; Materials; Mathematical model; Moment methods; Time domain analysis;
Conference_Titel :
Antennas and Propagation (EUCAP), 2012 6th European Conference on
Conference_Location :
Prague
Print_ISBN :
978-1-4577-0918-0
Electronic_ISBN :
978-1-4577-0919-7
DOI :
10.1109/EuCAP.2012.6206374
