Accession Number : AD0276224

Title :   ON THE GEOMETRICAL OPTICS APPROXIMATION FOR WAVES IN TRANSMISSION LINES WITH VARIABLE PARAMETERS

Corporate Author : EMMANUEL COLL BOSTON MASS RESEARCH LANGUAGE CENTER

Personal Author(s) : OSTROVSKY,L.A.

Report Date : 04 JAN 1962

Pagination or Media Count : 1

Abstract : An examination is made of the propagation of electromagnetic waves in dispersive systems with variable parameters: in a waveguide whose dielectric and magnetic permeabilities depend on time and the longitudinal coordinate, and in a neutral plasma with a variable electron concentration. It is shown that the fields in both cases can be described by a second order partial differential equation with variable coefficients. The investigation is made by successive approximations. The amplitude and frequency change of the wave in geometrical optics approximation are examined. The results obtained are illustrated by two particular examples. (Author)

Descriptors :   *DIELECTRIC PROPERTIES, *ELECTROMAGNETIC RADIATION, MAGNETIC FIELDS, OPTICAL ANALYSIS, PLASMAS(PHYSICS), TRANSLATIONS, TRANSMISSION LINES, WAVE PROPAGATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE