Current distribution and input admittance of an infinite cylindrical antenna in anisotropic plasma

The current distribution and input admittance of an infinitely long cylindrical antenna driven by a slice generator and immersed in an anisotropic plasma are investigated. The applied dc magnetic field is along the axis of the antenna. By superimposing the characteristic waves guided along the antenna, the current solution is obtained in the form of a one-dimensional integral, which is examined both analytically and numerically. When
K_{\perp} > 0
, the magnitude of the current decays slowly with the distance from the source, and its phase is nearly linear with a "propagation constant" equal to
\sqrt{K_{\perp}}k_{0}
for an antenna with very small radius. When
K_{\perp} < 0
, the magnitude of the current decreases rapidly away from the source, and its phase is no longer linear. The input admittance decreases with the radius of the antenna.