NDLI: Coaxial-Line Discontinuities

Content Provider	IEEE Xplore Digital Library
Author	Whinnery, J.R. Jamieson, H.W. Robbins, T.E.
Copyright Year	1931
Abstract	The equivalent circuits representing the effects from certain step-type discontinuities are obtained for coaxial transmission lines. It is shown that for the cases studied the effects of the local waves in the vicinity of the discontinuity can be accounted for exactly for calculation of relation between input- and output-end quantities by placing an admittance at the plane of the discontinuity in a transmission-line or principal-wave equivalent circuit. If frequency is low enough so that transverse dimensions are a small fraction of a wavelength, the discontinuity admittance is found to be a pure capacitance for these cases. Curves are presented giving the discontinuity capacitances in terms of the coaxial-line radii. Curves of a frequency factor F are calculated showing the amount the discontinuity capacitance must be corrected as transverse dimensions become comparable to wavelength. Curves of a proximity factor P are also given showing corrections to be applied to the discontinuity capacitance if a short-circuiting disk termination is placed near the plane of the discontinuity. The analysis of the case of a simple-step discontinuity on the inner cylinder is carried through in detail, and analyses of other cases are outlined.
Starting Page	695
Ending Page	709
Page Count	15
File Size	2853919
File Format	PDF
ISSN	00968390
Volume Number	32
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1944-11-01
Access Restriction	Subscribed
Rights Holder	The Institute of Radio Engineers, Inc. (IRE)
Subject Keyword	Coaxial components Transmission line discontinuities Capacitance Books Equivalent circuits Admittance Equations Transmission line measurements Impedance Power transmission lines
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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