1887

Abstract

Shielded monostatic transducers used in ground-penetrating radar investigations<br>(GPR) provide good results in probing subsurface features. Use of bistatic (paired) isofrequency<br>transducers can improve survey results. Bistatic antennas transmitting and receiving<br>at the same center frequency (iso-) can reduce ‘ringing” produced by initial contact<br>of a vertically incident radar pulse with highly conductive surface material. Selection<br>of a suitable antenna separation can improve capture of reflected pulses that would<br>be lost using a monostatic system. What is reported here is the use of a pair of antennas<br>having different center frequencies (allo-), with the higher frequency receiver serving as<br>a filter for the lower frequency transmitter. Impulse radar units transmit and receive<br>broad bandwidth pulses. Lower frequency antennas usually transmit pulses with higher<br>power, allowing specific frequencies to penetrate deeper into geologic media. In the<br>zone of frequency overlap, sufficient energy will be reflected back to the higher<br>frequency receiver to permit higher resolution of targets at greater depth.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609-pdb.206.1995_039
1995-04-23
2023-02-03
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.206.1995_039
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error