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An impedance boundary condition for the efficient matched termination of waveguides in FDTD simulations

✍ Scribed by José A. Pereda; Ángel Vegas; Andrés Prieto; Oscar Caño

Publisher: John Wiley and Sons
Year: 2002
Tongue: English
Weight: 139 KB
Volume: 34
Category: Article
ISSN: 0895-2477
DOI: 10.1002/mop.10400

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✦ Synopsis

Abstract

This Letter introduces a novel impedance boundary condition (IBC) for the matched termination of waveguide ports in finite‐difference–time‐domain (FDTD) simulators. It is based on approximating the wave impedance by a rational function over the frequency band of interest. To show the validity of the proposed IBC, the reflection coefficient of a wideband matched 90° H‐plane corner in rectangular waveguide is computed. The results obtained, which are less than −45 dB over the whole waveguide band, are in good agreement with those obtained by a commercial finite‐element simulator. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 151–155, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10400

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