A multi-static ground-penetrating radar with an array of resistively loaded vee dipole antennas for landmine detection

Kangwook Kim; Ali Cafer Gurbuz; Waymond R. Scott Jr.; James H. McClellan

doi:10.1117/12.604145

10 June 2005 A multi-static ground-penetrating radar with an array of resistively loaded vee dipole antennas for landmine detection

Kangwook Kim, Ali Cafer Gurbuz, Waymond R. Scott Jr., James H. McClellan

Author Affiliations +

Proceedings Volume 5794, Detection and Remediation Technologies for Mines and Minelike Targets X; (2005) https://doi.org/10.1117/12.604145
Event: Defense and Security, 2005, Orlando, Florida, United States

Abstract

A multi-static ground-penetrating radar (GPR) has been developed to investigate the potential of multi-static inversion algorithms. The GPR consists of a linear array of six resistively-loaded vee dipoles (RVDs), a network analyzer, and a microwave switch matrix all under computer control. The antennas in the array are spaced 12cm apart so the spacing between the transmitter and the receiver pairs in the measurements are from 12cm to 96cm in 12cm increments. The size of the array is suitable for the landmine problem and scaled measurements of the buried structure problem. The RVD is chosen as an array element because it is very "clean" in that it has very little self clutter and a very low radar cross section to lessen the reflections between the ground and the antenna. The shape and the loading profile of the antenna are designed to decrease the reflection at the drive point of the antenna while increasing the forward gain. The antenna and balun are made in a module, which is mechanically reliable without significant performance degradation. The multi-static GPR operation is demonstrated on targets buried in clean sand and targets buried under the ground covered by rocks. The responses of the targets are measured by each transmitter-receiver pair. A synthetic aperture, multi-static GPR imaging algorithm is extended from conventional monostatic back-projection techniques and used to process the data. Initial images obtained from the multi-static data are clearer than those obtained from bistatic data.

Citation Download Citation

Kangwook Kim, Ali Cafer Gurbuz, Waymond R. Scott Jr., and James H. McClellan "A multi-static ground-penetrating radar with an array of resistively loaded vee dipole antennas for landmine detection", Proc. SPIE 5794, Detection and Remediation Technologies for Mines and Minelike Targets X, (10 June 2005); https://doi.org/10.1117/12.604145

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