Loaded wideband dipole.
The loaded wideband dipole antenna was developed to radiate electromagnetic pulses of nanosecond duration range for use in ground penetrating radar. This is a directly excited antenna. The Driving Pulse Generator is located at the antenna. The antenna system of the ground penetrating radar consists of two attached dipoles.
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Common
transmitting and receiving antennas characteristics. ·
VSWR in the frequency band from 10
MHz to 500 MHz is less than 3; ·
width of radiation pattern at the
amplitude value level of 0.5: o
in E plane - 146°; o
in H plane - 360°; Transmitting
regime: ·
amplitude of the driving pulse is
140 V; ·
input impedance is about 200 W; ·
output impedance is about 360 W; Receiving
regime: ·
input impedance is about 360 W; ·
output impedance is 200 W, after transformation the output impedance is 50 W; it allows to connect standard transmission line
with the impedance of 50 W. ·
overall dimensions - 1100mm ´ 230mm ´ 500mm; ·
weight -
0,7kg. |
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Radiated pulse |
Description of loaded wideband dipole antenna is
·
G.P.Pochanin, P.V.Kholod and S.A.Masalov " Antenna system for
georadar "Zond - 10" consisting of a pair of curved loaded wideband
dipoles." // 3rd International Conference “Antenna Theory and
Techniques”, Sevastopol’, Ukraine, September 8-11, 1999, Proc. pp. 392-394.