Implementation of a GPU-Oriented Absorbing Boundary Condition for 3D-FDTD Electromagnetic Simulation

Keisuke DOHI  Yuichiro SHIBATA  Kiyoshi OGURI  Takafumi FUJIMOTO  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E95-D   No.12   pp.2787-2795
Publication Date: 2012/12/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E95.D.2787
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Section on Parallel and Distributed Computing and Networking)
Category: Parallel and Distributed Computing
Keyword: 
absorbing boundary condition,  perfectly matched layer,  FDTD,  GPU,  

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Summary: 
In this paper, we propose and discuss efficient GPU implementation techniques of absorbing boundary conditions (ABCs) for a 3D finite-difference time-domain (FDTD) electromagnetic field simulation for antenna design. In view of architectural nature of GPUs, the idea of a periodic boundary condition is introduced to implementation of perfect matched layers (PMLs) as well as a transformation technique of PML equations for partial boundaries. We also present efficient implementation method of a non-uniform grid. The evaluation results with a typical simulation model reveal that our proposed technique almost double the simulation performance and eventually achieve the 55.8% of the peak memory bandwidth of a target GPU.