Three-dimensional imaging technique for a directional borehole radar

Koen W.A. van Dongen; Peter M. van den Berg; Jacob T. Fokkema

doi:10.1117/12.450150

27 November 2001 Three-dimensional imaging technique for a directional borehole radar

Koen W.A. van Dongen, Peter M. van den Berg, Jacob T. Fokkema

Proceedings Volume 4491, Subsurface and Surface Sensing Technologies and Applications III; (2001) https://doi.org/10.1117/12.450150
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

In this paper we describe a directional borehole radar system. We first present the simulation and design of the antenna system. The antennas are positioned in a bistatic setup. In order to obtain a focused radiation pattern the transmitting and receiving dipoles are each shielded with a curved reflector. The radiation pattern of this scattered wavefield is computed by solving the integral equation for the unknown electric surface current at the conducting surface. Based on these numerical simulations, a prototype has been built. The radiation pattern measured in the plane perpendicular to the antenna is in good agreement with the computed pattern. Subsequently, we discuss a three-dimensional imaging method for this borehole radar. The computed radiation pattern is used in such a way that deconvolution for the angular radiation pattern can be applied. Some preliminary imaging results will be presented.

Citation Download Citation

Koen W.A. van Dongen, Peter M. van den Berg, and Jacob T. Fokkema "Three-dimensional imaging technique for a directional borehole radar", Proc. SPIE 4491, Subsurface and Surface Sensing Technologies and Applications III, (27 November 2001); https://doi.org/10.1117/12.450150

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