Browsing by Subject "Perfectly matched layers (PML)"

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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-configured ground-penetrating radars over randomly heterogeneous ground models
    (Wiley-Blackwell Publishing, Inc., 2002) Gürel, Levent; Oğuz, U.
    Ground-penetrating radar (GPR) problems are simulated using the finite-difference time-domain (FDTD) method. The GPR model is configured with arbitrarily polarized three antennas, two of which are transmitting antennas fed 180° out of phase. The receiver is placed in the middle of two transmitters, where it receives no direct coupling from the transmitting antennas. The ground is modeled as a dielectric, lossy, and heterogeneous medium. The performances of the transmitter-receiver-transmitter-configured GPRs above the heterogeneous ground models are investigated. The computational domain is terminated by perfectly matched layer (PML) absorbing boundaries. The PML is adapted to match both air and ground regions of the computation space.