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Dual-grid multiresolution technique for electrically large BoR-FDTD simulation

Dahlan, Samsul Haimi and Rolland, Anthony and Sauleau, Ronan (2012) Dual-grid multiresolution technique for electrically large BoR-FDTD simulation. Microwave and Optical Technology Letters, 54 (7). pp. 1714-1718.


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The dual-grid (DG) technique is implemented in the body-of-revolution FDTD algorithm (BoR-FDTD) for the fast analysis of large rotationally symmetric antennas. The proposed technique combines two BoR-FDTD simulations performed successively with fine and coarse mesh schemes, respectively. First, all excitation sources are analyzed locally with a fine mesh resolution and the near-field distributions are saved. Second, the whole problem (feeds and scatterers) is modeled using a coarser mesh where the computational domain is excited by the equivalent sources stored at the first stage. The continuity between these two simulations is guarantied by means of linear field interpolation or sampling (in space and time) and total/scattered field formulation. The relevance of the proposed technique is demonstrated through the analysis of a 60 x k0 parabolic antenna system illuminated by an electromagnetic band gap feed. The DG technique is found to be accurate and faster than the classical BoR-FDTD approach. Our results also show that significant savings are obtained in terms of computation time and memory. The DG-BoR-FDTD strategy is considered as a powerful and flexible approach to analyze the influence of the surrounding environments without having to repeat the expensive part of the simulation.

Item Type: Article
Uncontrolled Keywords: dual-grid scheme FDTD; bodies of revolution
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics
Divisions: Faculty of Electrical and Electronic Engineering > Department of Communication Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 22 Dec 2014 02:04
Last Modified: 22 Dec 2014 02:04
URI: http://eprints.uthm.edu.my/id/eprint/6095
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