Method of obtaining the impedance of an antenna in a dissipative medium from that in air

A Taylor-series expansion is applied in the complex frequency plane in order to find the admittance of an antenna in a dissipative medium from the admittance of the same antenna in air. The admittance of a dipole antenna immersed in mediums with tan ¿ = 0.01 and 0.02 is tabulated. The values so obtained are in good agreement with measurements. The error and the range of values of the loss tangent of the medium, and the length of the antenna for which the present method is applicable, are examined from various points of view.