Array of phase-shifted transmitters for GPR purposes

Pascale Lutz; Herve Perroud; Jean-Baptiste Daban; Eric De Bazelaire

doi:10.1117/12.462197

12 April 2002 Array of phase-shifted transmitters for GPR purposes

Pascale Lutz, Herve Perroud, Jean-Baptiste Daban, Eric De Bazelaire

Proceedings Volume 4758, Ninth International Conference on Ground Penetrating Radar; (2002) https://doi.org/10.1117/12.462197
Event: Ninth International Conference on Ground Penetrating Radar (GPR2002), 2002, Santa Barbara, CA, United States

Abstract

Arrays of phase-shifted antennas, made of several singleelement antennas, are commonly used in air radar and communication systems to obtain very directive radiation patterns. In this paper, we propose to apply this technology to GPR. Firstly, a theoretical study of linear arrays is presented, allowing to determine the influences of the element number, their spacing and phase-shift. Secondly, field experiments have been carned out, consisting of Common Receiver Gathers with two single 100 MHz antennas, in order to reconstruct sections acquired with arrays of 21 transmitters and a single receiver. The results lead to greater signal to noise ratios and penetration depths. Lastly, with the aim to build an actual array of transmitters, antennas of several kinds have been made and tested.

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Pascale Lutz, Herve Perroud, Jean-Baptiste Daban, and Eric De Bazelaire "Array of phase-shifted transmitters for GPR purposes", Proc. SPIE 4758, Ninth International Conference on Ground Penetrating Radar, (12 April 2002); https://doi.org/10.1117/12.462197

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KEYWORDS

Antennas

Transmitters

Receivers

General packet radio service

Signal to noise ratio

Ground penetrating radar

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