Effect of insulation on the radiation resistance of an electric dipole in a simple anisotropic medium

The radiation due to an axially oriented electric dipole situated on the axis of an infinite cylindrical column of insulating free space and surrounded by a uniaxially anisotropic plasma is investigated. The gyroelectric axis is assumed to be parallel to the axis of the insulating column of free space. For frequencies below the plasma frequency and for a column of sufficiently large radius, guided waves are found to be excited along the cylindrical column. The dependence of the dispersion and the power relations of the guided waves on the radius of the insulating column is examined. The radiation resistance of the electric dipole arising as a result of the space waves is found to be virtually unaffected by the dimensions of the insulating column for frequencies above the plasma frequency. For frequencies below the plasma frequency, the radiation resistance, which will be infinite in the absence of the insulation, remains finite. It is found that an increase in the radius of the insulating column results in a decrease in the radiation resistance of the electric dipole for frequencies below the plasma frequency.