Electromagnetic Waves in a Bounded, Anisotropic Plasma

Reflection, transmission, and absorption coefficients for oblique electromagnetic waves with parallel polarization incident on a warm plasma slab with a static magnetic field normal to its boundary, are studied. The effect of variation in the angle of incidence, the static magnetic field, the slab width, the plasma temperature, and the collision frequency on the various coefficients is shown graphically. It is found that the transmission coefficient increases with an increase in the plasma temperature. A change in the magnetostatic field strength decreases the transmission coefficient in one frequency region while it increases it in the other. For wave frequencies greater than cyclotron frequency, a sharp cutoff phenomenon occurs in the reflection coefficient at some angle. The absorption coefficient is found to be greater for larger slab width, except at a small frequency region where it shows oscillations.

Section: Discussionsupporting

confidence: 60%

“…The absorption coefficient is also shown (broken line curve) for 8 = I0-4 and flc = 0.01. It is seen that the reflection coefficient rises very sharply for 60° < () < 75° showing a "sharp cutoff" (Graf and Bachynski, 1962). The absorption coefficient is also seen to vary rapidly during this interval of 8.…”

Section: Computations and Discussionmentioning

confidence: 88%

Propagation of Oblique Electromagnetic Waves Through a Warm Plasma Slab With Normal Magnetostatic Field

Chawla¹,

Kalluri²,

Unz³

1967

“…Due to the rapid technological advance in the past several years, the subject of wave reflection from anisotropic media has become increasingly important. In applied electromagnetics, the approach to solutions of various boundary value problems has been the coordinate method; that is, one or more coordinate systems are used in obtaining solutions [Born and Wolf, 1970;Graf and Bachynski, 1962;Mueller, 1971;Pyati, 1967]. However, when analyzing wave propagation and reflection from anisotropic media, the coordinate method not only renders the solution difficult but also makes the final results cumbersome.…”

Section: Introductionmentioning

confidence: 99%

A coordinate‐free approach to wave reflection from an anisotropic medium

Chen¹

1981

The object of this paper is to present a coordinate-free method in solving the problem of wave reflection from the surface of an anisotropic medium. Based on the direct manipulation of vectors, dyadics, and their invariants, the method eliminates the use of coordinate systems. It facilitates solutions and provides results in a greater generality. The paper contains the following results in coordinate-free forms: (1) the dispersion equation, (2) the laws of reflection and refraction, (3) the Booker quartic equation, and (4) the transmission and reflection coefficient matrices.

Antenna Radiation Properties in Presence of Anisotropic Plasmas

Bachynski¹,

Gibbs²

1968

An extensive quantitative experimental investigation was conducted on the influence of a magnetic field on the radiation from a horn antenna situated behind a layer or sheath of plasma. The magnetic field direction in the experiments was along the principal direction of radiation of the antenna which is normal to the layer of plasma. The experimental results were compared with theory based on the reciprocity theorem. For the left circularly polarized wave radiation pattern, propagation effects at off‐normal incidence corresponding to the condition for which the ordinary wave mode switches to the extraordinary wave mode as the electron density passes through the critical density are shown to be of importance. For the right circularly polarized wave mode, significant departures in the measured radiation pattern from the theoretical occur in the region of the electron cyclotron frequency and below. Satisfactory correspondence between theory and experiment is found for values of the electron cyclotron frequency that are greater than the wave frequency.