NDLI: An improved unimodal absorbing boundary condition for waveguide problems

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An improved unimodal absorbing boundary condition for waveguide problems

Content Provider	IEEE Xplore Digital Library
Author	Kyung-Young Jung Hyeongdong Kim Kwang-Cheol Ko
Copyright Year	1991
Abstract	An improved unimodal absorbing boundary condition (ABC) is proposed by using one-dimensional (1-D) mode finite-difference time-domain (FDTD). In the unimodal ABC, an uniform auxiliary waveguide of input-output port should be introduced so that evanescent waves attenuate sufficiently. In this letter, the uniform auxiliary waveguide is simulated by 1-D mode FDTD rather than three-dimensional (3-D) FDTD which is used in the conventional unimodal ABC. Memory storage and CPU time are significantly reduced by applying the proposed ABC. A WG-90 rectangular waveguide with a thick asymmetric iris is analyzed by FDTD with the conventional modal ABC and the proposed ABC, and scattering parameters and computational efficiency are compared.
Starting Page	368
Ending Page	370
Page Count	3
File Size	64859
File Format	PDF
ISSN	10518207
Volume Number	7
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-11-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Boundary conditions Finite difference methods Time domain analysis Computational efficiency Costs Computational modeling Rectangular waveguides Iris Scattering parameters Wideband
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering

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