Summary
International Symposium on Antennas and Propagation
2009
Session Number:2B1
Session:
Number:2B1-3
A Compact Modified Bow-Tie Antenna for High-Resolution GPR
A.A. Lestari, E. Bharata, A.B. Suksmono, A. Kurniawan, A.G. Yarovoy, L.P. Ligthart,
pp.357-360
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
For impulse GPR it is generally required that the antenna have sufficiently large bandwidth and a constant phase center. The former is needed to allow transmission of UWB transient pulses with suppressed late-time ringing to avoid masking of targets. Resistive loading has always been the most popular loading scheme in this application as it can easily be applied on the antenna. However, it is well known that substantial decrease of antenna efficiency is the price that has to be paid when using purely resistive loading. In this paper we propose a modified resistively-loaded bow-tie antenna which has been optimized for an impulse GPR application. The proposed antenna has been designed to enable transmission of UWB pulses with higher radiation efficiency and lower level of late-time ringing in comparison with other resistively loaded planar antennas of a comparable or even larger size.