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Nonlinear sidebands of two powerful waves at closely spaced frequencies in the ionosphere
Author(s) -
Huang Z. H.,
Fejer J. A.
Publication year - 1987
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/rs022i004p00663
Subject(s) - physics , ionosphere , modulation (music) , optics , phase (matter) , computational physics , acoustics , geophysics , quantum mechanics
Observations of nonlinearly produced sidebands in the ionospherically reflected wave, using two powerful incident HF waves at closely spaced frequencies, are described. The sidebands are separated by multiples of the difference frequency of the incident waves. A theory for the production of the sidebands is proposed in terms of a modulation of the phase of the reflected wave at the difference frequency. The results of this theory are in reasonable agreement with the observations.