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Field Test Results Of A Beam-Steered Ground Penetrating Radar Array
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 14th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, Mar 2001, cp-192-00059
Abstract
This paper presents the results of field tests of a beam-steered ground penetrating radar (GPR)<br>system. The radar comprises an array of transmitting antenna elements and a conventional GPR receiver<br>system. The radar operates in bistatic mode. Each transmit antenna element is equipped with its own<br>transmitter electronics and timing circuitry. Beam-steering is achieved by appropriately delaying the<br>trigger pulse to each transmitter module. The transmit signal has a narrower and more powerful beam<br>when compared to convention single-antenna GPR systems, resulting in deeper penetration and enabling<br>better rejection of clutter through signal processing.<br>Results of field tests are presented for the radar operating on a medium of dry granite. The tests<br>verify that a narrow-beam GPR signal can be successfully steered in this particular medium.<br>Additionally, the results are discussed in relation to finite difference time domain analyses, with regard<br>to the broader implications for radar design and operation.