An improved quadratic interpolation ABC for ADI-FDTD method

In this paper, based on quadratic interpolation in time domain, an improved first-order absorbing boundary condition (ABC) for the alternating-direction-implicit finite-difference time-domain (ADI-FDTD) method is developed. The ABC is derived in two half-time steps iteration form which is very suita...

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Bibliographic Details
Main Authors: Jianing Zhao, Jianyi Zhou
Format: Conference Proceeding
Language:English
Subjects:
absorbing boundary condition (ABC)
alternating-direction-implicit finite-difference time-domain (ADI-FDTD) method
Boundary conditions
Error analysis
Finite difference methods
Interpolation
Laboratories
Millimeter wave technology
Mobile communication
nonuniform
phase velocity
quadratic interpolation
Reflection
Stability
Time domain analysis
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Description
Summary:In this paper, based on quadratic interpolation in time domain, an improved first-order absorbing boundary condition (ABC) for the alternating-direction-implicit finite-difference time-domain (ADI-FDTD) method is developed. The ABC is derived in two half-time steps iteration form which is very suitable for the ADI-FDTD method. The reflection of the ABC caused by both the truncated error and the phase velocity error is analyzed in detail. The phase velocity estimation and nonuniform cell are adopted to improve the performance of the ABC. Numerical results show that efficient improvement on the absorbing performance is achieved based on these methods.
ISSN:2165-4727
2165-4743
DOI:10.1109/APMC.2009.5385494