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Propagation in Nonuniform Slightly Gyrotropic Media
Author(s) -
Gross Stanley H.
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/rds196728893
Subject(s) - ionosphere , physics , coupling (piping) , representation (politics) , critical frequency , computational physics , electron , mathematical analysis , mathematics , materials science , quantum mechanics , geophysics , politics , political science , law , metallurgy
A previous paper, part I, presented the basic theory of propagation in nonuniform gyrotropic media in terms of an E and H mode representation. The representation results in a type of coupling that is independent of the rate of variation in the medium and thereby permits the study of regions with strong inhomogeneities along the gyrotropic axis. The coupling between modes arises due to the deviation of the gyromagnetic parameter Y = ωc / ω from zero and infinite values. Part I provided solutions for models with Y > 1. In this presentation, details will be given for the Y < 1 case which is pertinent for propagation in the ionosphere at medium and higher frequencies. An iterative expansion procedure is employed, as previously, and some general properties are deduced from the solutions. The analysis is applied to the evaluation of the far field radiated by an electric current element exterior to a parabolic electron density layer. These results are applicable to the study of propagation through an ionospheric layer or an ionospheric irregularity.