| Project/Area Number |
10650366
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
情報通信工学
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| Research Institution | Yamaguchi University |
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Principal Investigator |
HANO Mituo Yamaguchi University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (70108265)
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| Co-Investigator(Kenkyū-buntansha) |
羽野 光夫 山グヂ大学, 工学部, 助教授 (70108265)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1999: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1998: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | Electromagnetic Analysis / Time Domain Method / Non-Cubic Cells / PML / Higher-Order Cells / Microwave Devices |
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| Research Abstract |
The Finite-Difference Time-Domain (FDTD) method is arguably the most popular numerical method for the solution of problems in electromagnetics. In order to model open region problems, an absorbing boundary condition (ABC) is often used to truncate the computational domain since the tangential components of the electric field along the outer boundary of the computational domain cannot be updated using the basic Yee algorithm. Conformal modeling is an area of increasing interest and a new technique using tetrahedral cells has recently been proposed.
(1) Perfect matched layer technique used in a traditional FDTD method, can be extended to the non-cubic time domain method. Its absorption characteristics is as good as that of FDTD method.
(2) Although the non-cubic time-domain method needs much time for preconditioning, its algolithm in an update process is as fast as that of FDTD method.
(3) The numerical dispersion of the triangle cell and the hexahedral cell is smaller than that of the cubic cell.
(4) The high-order shape functions of the tetrahedral cell can be systematically constructed.
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