Low-reflection subgridding

Low-reflection subgridding

The paper presents a novel three-dimensional subgridding scheme applicable to the finite-difference technique in the time and frequency domains. Transfer of fields between a main grid and a refined volume is performed using a simple linear interpolation. Very low-reflection levels from the main to l...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 2005-05, Vol.53 (5), p.1587-1592
Hauptverfasser: Kulas, L., Mrozowski, M.
Format: Artikel
Sprache:eng
Schlagworte:
Accuracy
Applied sciences
Boundaries
Exact sciences and technology
Finite difference frequency domain (FDFD)
Finite difference method
Finite difference methods
finite difference time domain (FDTD)
Frequency domain analysis
Frequency domains
Frequency estimation
Interpolation
Mathematical analysis
Mathematical models
Microwaves
Radiocommunications
Radiowave propagation
Rectangular waveguides
Refining
Reflection
subgridding technique
Telecommunications
Telecommunications and information theory
Testing
Time domain analysis
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Beschreibung
Zusammenfassung:The paper presents a novel three-dimensional subgridding scheme applicable to the finite-difference technique in the time and frequency domains. Transfer of fields between a main grid and a refined volume is performed using a simple linear interpolation. Very low-reflection levels from the main to local grid interface are obtained by co-location of fields used in the interpolation process. The technique allows material traverse without any special boundary treatment. The accuracy of the scheme is verified in numerical tests showing excellent performance even for high refinement factors.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2005.847048