Browsing by Subject "Finite difference time domain (FDTD) method"

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    Subsurface-scattering calculations via the 3D FDTD method employing PML ABC for layered media
    (IEEE, 1997) Oğuz, Uğur; Gürel, Levent
    A three-dimensional finite-difference time-domain method that employs pure scattered-field formulation and perfectly matched layers (PML) as the absorbing boundary condition is developed for solving subsurface-scattering. A subsurface radar is modeled and the fields scattered from various buried objects with different parameters such as the size, depth, and number are observed and distinguished. The `derivative' signal, which can easily be obtained in practical systems, is useful in identifying the buried objects.
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    Transmitter-receiver-transmitter configurations of ground-penetrating radar
    (Wiley-Blackwell Publishing, Inc., 2002) Gürel, Levent; Oğuz, U.
    Three-dimensional ground-penetrating radar (GPR) geometries are simulated using the finite difference time domain (FDTD) method. The GPR is modeled with a receiver and two transmitters with arbitrary polarizations in order to cancel the direct signals emitted by the two transmitters at the receiver. This GPR configuration is used to simulate scenarios involving single or multiple targets with arbitrary sizes. The buried objects are modeled as cylindrical disks. Perfectly matched layer absorbing boundary conditions are used to terminate the layered FDTD computational domain.