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Groundwave Attenuation Function for Propagation Over A Highly Inductive Earth
Author(s) -
King R. J.,
Schlak Gerard A.
Publication year - 1967
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 - 10.1002/rds196727687
Subject(s) - attenuation , amplitude , phasor , phase (matter) , surface (topology) , physics , plane (geometry) , function (biology) , surface wave , wave propagation , mathematical analysis , plane wave , electromagnetic radiation , phase velocity , computational physics , optics , mathematics , geometry , quantum mechanics , power (physics) , evolutionary biology , biology , electric power system
Propagation of an electromagnetic groundwave over a plane surface in which the argument of the surface impedance is greater than π/4 but less than π/2 is considered in some detail. The numerical distance, p , over such a surface is characterized by 0 ≤ arg p ≤ π/2. The groundwave behaves in a peculiar manner, and this is attributed to the interaction of two phasor components representing a trapped wave and a Norton surface wave. Approximate expressions are derived which determine the magnitude and phase of the groundwave attenuation function when these two waves are inphase and antiphase. A method is also given for estimating the asymptotic phase for large | p | which was previously not possible except through detailed calculations. Finally, detailed curves are presented which show the amplitude and phase of the groundwave attenuation function versus p .