General implementation of thin-slot algorithms into the finite-difference time-domain code, TSAR, based on a slot data file
Two methods for modeling arbitrary narrow apertures in finite- difference time-domain (FDTD) codes are presented in this paper. The first technique is based on the hybrid thin-slot algorithm (HTSA) which models the aperture physics using an integral equation approach. This method can model slots that are narrow both in width and depth with regard to the FDTD spatial cell, but is restricted to planar apertures. The second method is based on a contour technique that directly modifies the FDTD equations local to the aperture. The contour method is geometrically more flexible than the HTSA, but the depth of the aperture is restricted to the actual FDTD mesh. A technique to incorporate both narrow-aperture algorithms into the FDTD code, TSAR, based on a slot data file'' is presented in this paper. Results for a variety of complex aperture contours are provided, and limitations of the algorithms are discussed.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5755197
- Report Number(s):
- SAND-91-1061; ON: DE91014336
- Country of Publication:
- United States
- Language:
- English
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Modeling arbitrarily directed slots that are narrow both in width and depth with regard to the FDTD spatial cell
Hybrid thin-slot algorithm for the analysis of narrow apertures in finite-difference time-domain calculations
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ALGORITHMS
APERTURES
CONVERGENCE
DIELECTRIC MATERIALS
DIFFERENTIAL EQUATIONS
ELECTRIC CONDUCTORS
ELECTRIC FIELDS
ELECTRIC IMPEDANCE
EQUATIONS
FINITE DIFFERENCE METHOD
FUNCTIONS
GREEN FUNCTION
IMPEDANCE
INTEGRAL EQUATIONS
ITERATIVE METHODS
MAGNETIC FIELDS
MATERIALS
MATHEMATICAL LOGIC
MAXWELL EQUATIONS
NUMERICAL SOLUTION
OPENINGS
PARTIAL DIFFERENTIAL EQUATIONS
THREE-DIMENSIONAL CALCULATIONS