Premium
Radiation From a Short Electric Dipole in a Hot Uniaxial Plasma
Author(s) -
Singh N.,
Gould R. W.
Publication year - 1971
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs006i012p01151
Subject(s) - physics , radiation , landau damping , electromagnetic radiation , plasma , antenna (radio) , optics , radiation resistance , radiation pattern , dipole , electric field , electron , magnetic field , computational physics , quantum mechanics , telecommunications , computer science
The effects of electron temperature on the radiation fields and the resistance of a short electric dipole antenna embedded in a uniaxial plasma have been studied. The radiation condition for solving Maxwell's equations is discussed, and the phase and group velocities for propagation are given. It is found that for ω < ω ρ the antenna excites two waves, a slow wave and a fast wave. These waves propagate only within a cone whose axis is parallel to the biasing magnetostatic field B 0 and whose half‐cone angle is slightly less than sin −1 (ω/ω ρ ). In the case of ω > ω ρ the antenna excites two separate modes of radiation. One of the modes is the electromagnetic mode, while the other mode is of hot plasma origin. A characteristic interference structure is noted in the angular distribution of the field. The input and the radiation resistances are calculated and are shown to remain finite for nonzero electron thermal velocities. The effect of Landau damping and the antenna length on the input and the radiation resistances has been considered.