REFLECTION AND AMPLIFICATION OF ELECTROMAGNETIC WAVES IN AN OSCILLATING IONIZED MEDIUM. PART II,

Abstract

An investigation of the scattering of a plane wave incident upon a time-space periodically-modulated dispersive medium is presented. The ambiguity associated with Floquet's theorem is resolved and also a generalization of Bragg's law is given to include moving scatterers. The interpretation of the Brillouin diagrams is extended in order to take the 'self-consistent' modes into account. It is demonstrated that the dispersion yields possibilities to four types of interaction which leads to evanescent waves, simple propagating waves, growing waves, and also to an absolute instability. A rigorous solution, including all the 'self-consistent' modes, and the corresponding infinite number of time-space harmonics is given. Computer results are presented and demonstrated to accord very well with the more practical coupled-mode analysis. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1967
Accession Number
AD0670559

Entities

People

  • J. Askne

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Ambiguity
  • Amplification
  • Computers
  • Dispersions
  • Evanescent Waves
  • Harmonics
  • Instability
  • Plane Waves
  • Reflection
  • Scattering
  • Waves

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Plasma Physics / Magnetohydrodynamics

Technology Areas

  • Space
  • Space - Hall-Effect Thruster