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Proceedings Paper

Dual-antenna impulse radar for improved detection of buried land mines
Author(s): Hakan O. Brunzell; Anders Ericsson
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Paper Abstract

The present paper is a part of a project with the goal of developing a hand-held system for detection of buried landmines. The system is based on an impulse radar operating in the frequency band 0.3 - 3 GHz. Previously a crossed dipole antenna has been used for transmit and receive. This antenna has now been complemented by another crossed dipole antenna, rotated 45 degrees relative the first one. The two antenna pairs are not active simultaneously, but transmits/receives alternately. The antenna pattern of a crossed dipole antenna resembles a 'four leaf clover,' and one advantage with using two rotated antenna pairs is that the dead angles in the antenna pattern will be covered by the second antenna. Another, perhaps more important, advantage is that the detection capability of the system can be improved by using the information in both antenna channels. For example, if the antenna is positioned above a relatively smooth surface with no target present, then the returned signals in the two channels will be almost equal. If, however, a target is present the signals will be different when we switch between the channels. The second channel also provides an independent realization of the background clutter, and by fusing the two channels the clutter level can be decreased considerably. This paper will present different detection algorithms that exploit this information added by the second antenna channel. The algorithms are evaluated on real data from the impulse radar system.

Paper Details

Date Published: 4 September 1998
PDF: 10 pages
Proc. SPIE 3392, Detection and Remediation Technologies for Mines and Minelike Targets III, (4 September 1998); doi: 10.1117/12.324246
Show Author Affiliations
Hakan O. Brunzell, Chalmers Univ. of Technology (United States)
Anders Ericsson, Swedish Defence Research Establishment (Sweden)

Published in SPIE Proceedings Vol. 3392:
Detection and Remediation Technologies for Mines and Minelike Targets III
Abinash C. Dubey; James F. Harvey; J. Thomas Broach, Editor(s)

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