Radiation from an electric dipole in anisotropic media

Based on the single-fluid theory of magnetohydrodynamics (MHD), the investigation deals with a comparative study on the radiation characteristics of an electric dipole in homogeneous anistropic media of infinite extent with a uniform magnetostatic field. Attention is specifically focussed on the excitation of waves in a frequency range below the ion cyclotron frequency. In the asymptotic evaluation of the far fields, critical cases of the dispersion curves having points of inflexion or unbounded branches are briefly considered. The normalized power density as a function of the polar angle θ (being measured from the axis of the magnetic field) is calculated, and it is shown that both compressibility and Hall effects enhance the angular zone of radiation for increasing values of the parameters χ and λ.