Modeling arbitrarily directed slots that are narrow both in width and depth with regard to the FDTD spatial cell
The Hybrid Thin-Slot Algorithm (HTSA) integrates a transient integral-equation solution for an aperture in an infinite plane into a finite-difference time-domain (FDTD) code. The technique was introduced for linear apertures and was extended to include wall loss and lossy internal gaskets. A general implementation for arbitrary thin slots is briefly described here. The 3-D FDTD-code TSAR was selected for the implementation. The HTSA does not provide universal solutions to the narrow slot problem, but has merits appropriate for particular applications. The HTSA is restricted to planar slots, but can solve the important case that both the width and depth of the slot are narrow compared to the FDTD spatial cell. IN addition, the HTSA is not bound to the FDTD discrete spatial and time increments, and therefore, high-resolution solutions for the slot physics are possible. The implementation of the HTSA into TSAR is based upon a ``slot data file`` that includes the cell indices where the desired slots are exist within the FDTD mesh. For an HTSA-defined slot, the wall region local to the slot is shorted, and therefore, to change the slot`s topology simply requires altering the file to include the desired cells. 7 refs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 10123975
- Report Number(s):
- SAND-91-2910C; CONF-920750-3; ON: DE92008015
- Resource Relation:
- Conference: Institute of Electrical and Electronic Engineers Antennas and Propagation Society (IEEE-APS) international symposium,Chicago, IL (United States),18-25 Jul 1992; Other Information: PBD: [1991]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
FINITE DIFFERENCE METHOD
ALGORITHMS
MAXWELL EQUATIONS
INTEGRAL EQUATIONS
APERTURES
GREEN FUNCTION
ELECTROMAGNETIC FIELDS
WALLS
661300
990200
OTHER ASPECTS OF PHYSICAL SCIENCE
MATHEMATICS AND COMPUTERS