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      • Department of Electrical and Electronics Engineering
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      Interpolation techniques to improve the accuracy of the plane wave excitations in the finite difference time domain method

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      Author
      Oğuz, U.
      Gürel, Levent
      Date
      1997-11
      Source Title
      Radio Science
      Print ISSN
      0048-6604
      Publisher
      Wiley-Blackwell Publishing, Inc.
      Volume
      32
      Issue
      6
      Pages
      2189 - 2199
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      The importance of matching the phase velocity of the incident plane wave to the numerical phase velocity imposed by the numerical dispersion of the three-dimensional (3-D) finite difference time domain (FDTD) grid is demonstrated. In separate-field formulation of the FDTD method, a plane wave may be introduced to the 3-D computational domain either by evaluating closed-form incident-field expressions or by interpolating from a 1-D incident-field array (IFA), which is a 1-D FDTD grid simulating the propagation of the plane wave. The relative accuracies and efficiencies of these two excitation schemes are compared, and it has been shown that higher-order interpolation techniques can be used to improve the accuracy of the IFA scheme, which is already quite efficient.
      Keywords
      Finite difference method
      Interpolation
      Three dimensional
      Time domain analysis
      Velocity
      Finite difference time domain method
      Phase velocity
      Electromagnetic wave propagation
      Permalink
      http://hdl.handle.net/11693/25584
      Published Version (Please cite this version)
      https://doi.org/10.1029/97RS02515
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      • Department of Electrical and Electronics Engineering 3524
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