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Radiation and propagation of a surface‐wave mode on a curved open waveguide of arbitrary cross section
Author(s) -
Chang David C.,
Kuester Edward F.
Publication year - 1976
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs011i005p00449
Subject(s) - waveguide , propagation constant , radius of curvature , optics , curvature , radiation mode , physics , radius , constant (computer programming) , constant curvature , surface (topology) , radiation , cross section (physics) , mathematical analysis , mode (computer interface) , surface wave , wave propagation , mathematics , computational physics , geometry , single mode optical fiber , mean curvature , computer science , optical fiber , quantum mechanics , mean curvature flow , computer security , programming language , operating system
A general scheme for calculating the change (both the real part and the imaginary part) of the propagation constant of a surface‐wave mode on a general open waveguide structure is presented. By carefully keeping track of lower‐order terms in the analysis, it is shown how approximations commonly made in other analyses can result in quite significant errors in the determination of the radiation loss. The resulting formulas require knowledge only of the fields and propagation constant of the corresponding straight waveguide mode, and the value of the radius of curvature of the waveguide axis. As a simple example, the curvature loss of a Goubau line is calculated.