Input admittance, radiation fields, and patterns of an infinitely long antenna immersed in an isotropic, homogeneous and warm plasma

The effect of plasma on antenna characteristics is a subject of considerable interest and many researchers have attempted this problem for different plasma situations. Analysis has been made of antennas in plasmas for different current distributions using various analytical methods. Also current distributions on the antenna have been obtained without taking into account the ion sheath effect. In this paper an attempt has been made to solve the boundary value problems of an infinitely long cylindrical antenna of a finite radius for the case when the antenna is not in direct contact with the plasma. Solving the current distribution, which is in the form of an inverse Fourier transform, the input admittance, etc., has been theoretically obtained and the results are compared with the experimental findings of Miller and Monroe.