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《A Modied Bow-Tie Antenna for Improved Pulse》.pdf
2184 IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 58, NO. 7, JULY 2010
A Modified Bow-Tie Antenna for Improved Pulse
Radiation
Andrian Andaya Lestari, Member, IEEE, Endon Bharata, Andriyan Bayu Suksmono, Senior Member, IEEE,
Adit Kurniawan, Alexander G. Yarovoy, Senior Member, IEEE, and Leo P. Ligthart, Fellow, IEEE
Abstract— The analysis, design, and realization of a modified already reported in the past by many investigators including
bow-tie antenna optimized for impulse ground penetrating radar Brown and Woodward who carried out an experimental inves-
(GPR) applications is described. The proposed antenna shows tigation of bow-tie antennas [1], Carrel who was the first to
improved properties important for GPR, which include its compact
size (in comparison with a conventional bow-tie antenna) and show analytically that the bandwidth of a bow-tie antenna de-
ability to radiate UWB pulses with increased amplitude and very pends on the bow-tie flare angle [2], Lambert et al. [3] and Lee
small late-time ringing. A substantial increase in the amplitude and Smith [4] who improved Carrel’s analytical solution, and
of the transmitted pulse is achieved by utilizing radiation from Shlager et al. [5] and Leat et al. [6] who developed a numer-
discontinuities introduced by the resistive loading employed in
the antenna to suppress late-time ringing. By choosing an optimal ical model for a bow-tie antenna. In the last couple of decades
distance between the antenna’s feed point and the location of the bow-tie antennas have been introduced in many ultrawideband
resistive loading, radiations that occur from the ante
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