DocumentCode :
1435353
Title :
On the solution of a class of large body problems with full or partial circular symmetry by using the finite-difference time-domain (FDTD) method
Author :
Yu, Wenhua ; Arakaki, Dean ; Mittra, Raj
Author_Institution :
Electromagnetic Commun. Res. Lab., Pennsylvania State Univ., University Park, PA, USA
Volume :
48
Issue :
12
fYear :
2000
fDate :
12/1/2000 12:00:00 AM
Firstpage :
1810
Lastpage :
1817
Abstract :
This paper presents an efficient method to accurately solve large body scattering problems with partial circular symmetry. The method effectively reduces the computational domain from three to two dimensions by using the reciprocity theorem. It does so by dividing the problem into two parts: a larger 3-D region with circular symmetry, and a smaller 2-D region without circular symmetry. An finite-difference time-domain (FDTD) algorithm is used to analyze the circularly symmetric 3-D case, while a method of moments (MoM) code is employed for the nonsymmetric part of the structure. The results of these simulations are combined via the reciprocity theorem to yield the radiation pattern of the composite system. The advantage of this method is that it achieves significant savings in computer storage and run time in performing an equivalent 2-D as opposed to a full 3-D FDTD simulation. In addition to enhancing computational efficiency, the FDTD algorithm used in this paper also features one improvement over conventional FDTD methods: a conformal approach for improved accuracy in modeling curved dielectric and conductive surfaces. The accuracy of the method is validated via a comparison of simulated and measured results
Keywords :
conducting bodies; dielectric bodies; electromagnetic wave scattering; finite difference time-domain analysis; method of moments; 2D region; 3D region; EM wave scattering; FDTD algorithm; FDTD method; MoM code; composite system; computational efficiency; computer storage savings; conformal approach; curved conductive surfaces; curved dielectric surfaces; finite-difference time-domain; full circular symmetry; large body scattering problems; measured results; method of moments; partial circular symmetry; radiation pattern; reciprocity theorem; run time reduction; simulated results; simulations; Algorithm design and analysis; Computational efficiency; Computational modeling; Computer simulation; Dielectrics; Finite difference methods; Interconnected systems; Moment methods; Scattering; Time domain analysis;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/8.901269
Filename :
901269
Link To Document :
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