NDLI: Mysterious behavior of the excited near fields on printed-circuit transmission lines: physical contribution of a non-physical solution

Content Provider	IEEE Xplore Digital Library
Author	Tsuji, M. Shigesawa, H.
Copyright Year	2000
Description	Author affiliation: Dept. of Electron., Doshisha Univ., Kyoto, Japan (Tsuji, M.)
Abstract	It is well known that, when most printed-circuit transmission lines are excited by a practical monochromatic high-frequency source, the near-field amplitude decay exponentially along the line axis due to the excitation of a leaky mode. Such a situation usually occurs when the leaky mode is the only physical solution at a given frequency. However, we sometimes meet with an unexpected situation in which the near-field amplitude decays with a decay constant much smaller than that expected from the leaky-mode eigenvalue, even though the only physical solution at the operating frequency is the leaky-mode solution. No answer to this mysterious situation could be found previously, until when we found that such a slow decay in the near-field-amplitude variation depends strongly on an indirect effect from a nonphysical improper-real solution that exists at the operating frequency. We show several kinds of evidence that prove our interpretation of this mysterious problem, including theoretical discussions and experimental results.
Starting Page	402
Ending Page	405
File Size	284903
Page Count	4
File Format	PDF
ISBN	0780363779
DOI	10.1109/ISAPE.2000.894809
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-08-15
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transmission lines Frequency Transmission line theory Eigenvalues and eigenfunctions Strips Finite difference methods
Content Type	Text
Resource Type	Article

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