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High resolution groud penetrating image radar using an ultra wideband (UWB) impulse waveform  

Park Young-Jin (Korea Electrotechnology Research Institute(KERI))
Kim Kwan-Ho (Korea Electrotechnology Research Institute(KERI))
Lee Won-Tae (Korea Electrotechnology Research Institute(KERI))
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.42, no.11, 2005 , pp. 101-106 More about this Journal
Abstract
A ground penetrating image radar (GPR) using an ultra wideband (UWB)impulse waveform is developed for non destructive detection of metallic pipelines buried under the ground. Dielectric constant of test field is measured and then a GPR system is designed for better detection up to 1 meter deep. By considering total path loss, volume of complete system, and resolution, upper and lower frequencies are chosen. First, a UWB impulse for the frequency bandwidth of the impulse is chosen with rising time less than 1 ns, and then compact planar UWB dipole antenna suitable for frequency bandwidth of a UWB impulse is designed. Also, to receive reflected signals, a digital storage oscilloscope is used. For measurement, a monostatic technique and a migration technique are used. For visualizing underground targets, simple image processing techniques of A-scan removal and B-scan average removal are applied. The prototype of the system is tested on a test field in wet clay soil and it is shown that the developed system has a good ability in detecting underground metal objects, even small targets of several centimeters.
Keywords
Ground Penetrating Radar (GPR); non destructive detection; migration technique;
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