Vertical linear antennas in the presence of a lossy half-space: An improved approximate model

The unknown current distribution (UCD) and the input impedance/admittance of the vertical dipole antenna (VDA) in the presence of the homogeneous and isotropic lossy half-space are determined in this paper. The moment method (MoM) with an entire domain polynomial current approximation for numerical approach to the system of integral equations of Hallen's type (SIE-H) is applied for solving of this problem. The influence of the finite ground conductivity, expressed by the Sommerfeld's integral kernel (SIK), is modelled in a new simple way without limitations for the refraction index. This model gives output numerical results of enviable accuracy.