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Proceedings Paper

Analysis of antennas for step-frequency ground-penetrating radar
Author(s): Valeri A. Mikhnev; Y. Maksimovitch; Pertti Vainikainen
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Paper Abstract

Antenna is considered to be the most critical part of any OPR system. AithoLigh a lot of work had been done in the field of antenna modeling and design, GPR antenna measurements and their comparison still do not have reliable methodological basis. This work is devoted to the comparison of performance of different GPR antennas used in step-frequency radar. To this end, we employed technique based on radar calibration and subtraction of a dominant response usually represented by the ground return. The residue is further transformed into synthetic range profile and serves as a measure of the antenna non-ideality. A metal sheet shifted from the calibration position has been used as a test object. In this case, subtraction of the dominant reflection leaves only clutter components in the received signal. Discrimination of small shallow underground object can also provide means for the antenna comparison. The more ideal is the GPR antenna, the more effective is the calibration/subtraction procedure. Hence, small shallow target can be detected or not depending on the antenna performance and this is demonstrated in several experimental examples.

Paper Details

Date Published: 12 April 2002
PDF: 5 pages
Proc. SPIE 4758, Ninth International Conference on Ground Penetrating Radar, (12 April 2002); doi: 10.1117/12.462191
Show Author Affiliations
Valeri A. Mikhnev, Helsinki Univ. of Technology (Finland)
Y. Maksimovitch, Helsinki Univ. of Technology (Finland)
Pertti Vainikainen, Helsinki Univ. of Technology (Finland)

Published in SPIE Proceedings Vol. 4758:
Ninth International Conference on Ground Penetrating Radar
Steven Koppenjan; Hua Lee, Editor(s)

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