Summary
International Symposium on Antennas and Propagation
2008
Session Number:4A12
Session:
Number:4A12-1
Considerations of the Phase Effect for a CrossBorehole Pulse Radar Receiver
Jae-Hyoung Cho, Sang-Wook Kim, Jong-Gwan Yook, Se-Yun Kim,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
Borehole radar is an effective tool to explore underground anomalies [1]. It has been used for detection and localization of water pipes, subsurface fractures, etc. And it can also be applied to the long term monitoring of underground nuclear waste and LNG storage. In our previous work [2], we developed a cross-borehole pulse radar system for detecting underground cavities in the depth of hundreds meters. This system transmits a Gaussian pulse signal and receives its attenuated signal using low noise & variable gain amplifier for compensation. The received signal is analyzed by arrival time, attenuation, and dispersion in time domain. Therefore, the first peak of the received signal is one of the important parameters for signal synthesis. Due to the spectrum of the Gaussian pulse and the propagation characteristics through underground, a receiver should include such capability as high-pass filter for preventing saturation. But the first peak of the received signal is changed by the phase characteristics of the high-pass filter. Hence the phase effect is considered here for optimal design of the receiver.