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A new ultrawide-bandwidth dielectric-rod antenna for ground-penetrating radar applications

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3 Author(s)
Chi-Chih Chen ; ElectroSci. Lab., Ohio State Univ., Columbus, OH, USA ; Kishore Rama Rao ; R. Lee

A new ultrawide-bandwidth dielectric-rod antenna is presented with its application in detecting shallow targets, such as antipersonnel (AP) mines. The lowest hybrid mode is launched and guided along a circular-dielectric waveguide. The end of the waveguide is tapered to a point where electromagnetic waves are radiated out with field behavior similar to that radiated from a Hertzian dipole in the forward direction. The low antenna clutter and weak antenna-ground interaction are two unique features. Its near-field radiation properties are investigated by directly probing the fields and by numerical simulation with a three-dimensional finite-difference time-domain technique. Both measurement and numerical simulation results are presented for the detection of buried AP mines using a prototype dielectric-rod antenna operated at a frequency range from 1 to 6 GHz.

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:51 ,  Issue: 3 )