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International Journal of Geophysics
Volume 2012, Article ID 916176, 8 pages
http://dx.doi.org/10.1155/2012/916176
Research Article

Antipodal Vivaldi Antenna for Water Pipe Sensor and Telemetry

Antenna & High Frequency Research Centre, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland

Received 20 March 2012; Accepted 5 May 2012

Academic Editor: Francesco Soldovieri

Copyright © 2012 Giuseppe Ruvio et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An antipodal Vivaldi antenna operates simultaneously for telemetry and sensing when placed conformally onto PVC pipes. Good radiation efficiency is realised and the antenna impedance matching remains stable when a pipe is empty or contains water. The fidelity factor performance based on an input Ultra-Wideband Gaussian pulse is a suitable figure of merit to detect water presence. Different water levels and pipe conditions correspond to fidelity factors between 90% and 96%, which are a suitable dynamic range for sensing and the appropriate quality for pulse communications for remote monitoring.