Accurate FDTD Modelling of Resistively-Loaded Bow-Tie Antennas for GPR Applications

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 4Language: englishTyp: PDF

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Caratelli, Diego; Yarovoy, Alexander; Ligthart, Leo P. (International Research Centre for Telecommunications and Radar, Delft University of Technology, Mekelweg 4, 2628 CD, P.O. Box 5031, 2600 GA, Delft, The Netherlands)

In this paper, a cavity-backed bow-tie antenna for ground-penetrating radar is presented. Dielectric embedding and resistive loading of the radiating structure are employed to achieve a 10:1 relative bandwidth (from 100 MHz to 1GHz ), with a maximum antenna size of 52 cm , and stable performance over different types of the ground. The full-wave analysis of the developed antenna is performed by means of a dedicated locally conformal finite-difference time-domain procedure.