Ground Penetrating Radar (GPR)
Ground Penetrating Radar (GPR)
Ground Penetrating Radar (GPR)
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<strong>Ground</strong> <strong>Penetrating</strong> <strong>Radar</strong> (<strong>GPR</strong>) IET-<strong>Radar</strong> 2013<br />
Size of Antenna and its<br />
operation Frequency<br />
EM Radiation from a Dipole Antenna<br />
31<br />
32<br />
Transmitted signal<br />
Antenna for <strong>GPR</strong><br />
1<br />
30<br />
Amplitude<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
0<br />
-0.2<br />
-0.4<br />
-0.6<br />
-0.8<br />
-1<br />
0 50 100 150 200 250<br />
Time (ns)<br />
Amplitude (dB(dB)<br />
p ( )<br />
20<br />
10<br />
0<br />
-10<br />
-20<br />
-30<br />
-40<br />
0 100 200 300 400 500<br />
Frequency (MHz)<br />
1.Broadband<br />
2.Phase characteristics<br />
3.Polarization<br />
4.Tx-Rx Isolation<br />
5.Size<br />
waveform<br />
spectrum<br />
33<br />
GICHD 21 March 2007 34<br />
Antenna Design<br />
Transient Radiation from a<br />
Vivaldi antenna (FD-TD)<br />
Vivaldi antenna<br />
GICHD 21 March 2007 35<br />
GICHD 21 March 2007 36<br />
Motoyuki Sato (Tohoku University, Japan) 6
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