The dipole antenna immersed in a homogeneoous conducting medium

Abstract

It is the object of this investigation to measure the driving-point admittance, the amplitude distribution of the current, and the phase distribution of the current, relative to the phase at the driving-point for a dipole antenna immersed in a homogeneous conducting medium. Measurements of the driving-point admittance have been made for a range of values of the ratio <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\sigma/\omega\epsilon_{r}\epsilon_{0}</tex> of the medium taking the electrical height of the antenna <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\beta h</tex> as a parameter. The ratio <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\sigma/\omega\epsilon_{r}\epsilon_{0}</tex> is varied from <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\sigma/\omega\epsilon_{r}\epsilon_{0}=0.036</tex> to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\sigma/\omega\epsilon_{r} \epsilon_{0}=8.8</tex> and the antenna height <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\beta h</tex> is varied from <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\beta h=0.1</tex> to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2\pi</tex> at intervals of 0.1. The amplitude and phase distributions of the current have been measured for <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\beta h = \pi/2, 3\pi/4, \pi</tex> , and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5/4\pi</tex> in a homogeneous conducting medium whose conductivity is varied from <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\sigma/\omega\epsilon_{r} \epsilon_{0}=0.036</tex> to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\sigma/\omega\epsilon_{r}\epsilon_{0}=8.8</tex> .