Title :
Ground influence on the input impedance of transient dipole and bow-tie antennas
Author :
Lestari, Andrian Andaya ; Yarovoy, Alexander G. ; Ligthart, Leo P.
Author_Institution :
Int. Res. Centre for Telecommun.-Transmission & Radar, Delft Univ. of Technol., Netherlands
Abstract :
In this paper, the influence of a lossy ground on the input impedance of dipole and bow-tie antennas excited by a short pulse is investigated. It is shown that the ground influence on the input impedance of transient dipole and bow-tie antennas is significant only for elevations smaller than 1/5 of the wavelength that corresponds to the central frequency of the exciting pulse. Furthermore, a principal difference between the input impedance due to traveling-wave and standing-wave current distributions is pointed out.
Keywords :
antenna travelling wave arrays; current distribution; dipole antennas; electric impedance; electromagnetic pulse; bow-tie antenna; input impedance; lossy ground; short pulse excitation; standing-wave current distribution; transient dipole antenna; traveling-wave distribution; Current distribution; Dipole antennas; Ground penetrating radar; Impedance; Integral equations; Loaded antennas; Space technology; Time domain analysis; Transient analysis; Transmitting antennas; Bow-tie antenna; dipole antenna; input impedance; transient antenna;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2004.832371
