Abstract
A Hallen's type integral equation is solved by the method of moments with sub-sectional basis and parabolic expansion functions. The effect of the ground is taken into account by reflection-coefficient approximation. A variational expression is derived for the impedance changes resulting from the presence of a lossy ground. Numerical results are presented for the current distribution and impedance changes of quarter-wave vertical antennas on an inhomogeneous wet ground at 1 MHz and 5 MHz as a function of thickness and elevation of antennas.
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