MODULATED SURFACE WAVE ANTENNAS. NON-LINEAR PLASMA.
Abstract
A computational technique for approximating the radiation patterns of phase modulated slow wave antennas with beams at any arbitrary angle is presented. The interrelation of the phase modulation, associated amplitude modulation, and attenuation is discussed. The technique considers the superposition of the spacial harmonics resulting from the phase modulation and the utilization of approximate expressions for the amplitude modulation based on theoretical and experimental results. The attenuation is related to the coefficients of the special harmonics. Numerical solutions to several problems dealing with nonlinear wave propagation in plasmas have been obtained. The results are displayed in the form of graphs. The problems include (1) electromagnetic wave propagation through a steady-state, inhomogeneous, isotropic nonlinear plasma slab, (2) transverse electromagnetic wave propagation through a semi-finite, inhomogeneous, time-varying, isotropic non linear plasma, and (3) electromagnetic wave propagation through a semi-finite, inhomogeneous, time-varying, anisotropic nonlinear plasma. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1966
- Accession Number
- AD0484502
Entities
People
- Abdelnour S. Thomas
- Lawrence A. Dysart Jr.