Accession Number : AD0641014

Title :   THE FREQUENCY-POWER RELATION IN A TRAVELING-WAVE MODULATED DIELECTRICS,

Corporate Author : POLYTECHNIC INST OF BROOKLYN N Y MICROWAVE RESEARCH INST

Personal Author(s) : Peng,S. T. ; Cassedy,E. S.

Report Date : 18 MAY 1966

Pagination or Media Count : 14

Abstract : In a steady state analysis, the Manley-Rowe frequency-power relation is shown to be valid for the propagation of electromagnetic waves through a dielectric medium which is modulated with a traveling acoustic wave. The Fourier amplitudes of the internal electromagnetic fields are exactly calculated and shown to satisfy this relation. In the pass band a net transfer of frequency-power is permitted. Frequency-power transfer vanishes in the stop band, but this does not imply zero transfer of real power. As an application, the frequency-power relation was used to find an invariant constraint on the scattering matrix of a two-part network formed by a traveling-wave-modulated transmission line section. It is shown that the scattering matrix is no longer unitary, that the modulated medium can give energy to or absorb energy from the signal waves, depending on the operation conditions. (Author)

Descriptors :   (*ELECTROMAGNETIC RADIATION, PROPAGATION), (*DIELECTRICS, WAVE PROPAGATION), MODULATION, ACOUSTICS, TRANSMISSION LINES

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE