Low Power Monostatic Pulse Borehole Radar with an Active Circulator and an Absorptive Switch

Authors
Cho, Jae-HyoungYook, Jong-GwanKim, Se-Yun
Issue Date
2013
Publisher
IEEE
Citation
3rd Asia-Pacific Microwave Conference Proceedings (APMC), pp.570 - 572
Abstract
A low power monostatic pulse borehole radar system is designed and tested for detecting a subversive intrusion tunnel with about 2 m diameter. According to our calculated budget under the condition that the transmitting signal is over 1 V peak with 10 ns full width half maximum, its switching speed becomes faster than 100 ns for detecting an air-filled tunnel nearby the employed borehole. To satisfy the above requirement, the monostatic pulse radar is fabricated with an active circulator using operational amplifiers and a switch for guaranteeing isolation and cutting off the direct signal. Then, the system performance is evaluated in a well suited tunnel test site. The measured data illustrate that the monostatic pulse radar provides the parabolic pattern of a typical tunnel signature comparable to that of a conventional bistatic pulse radar.
URI
https://pubs.kist.re.kr/handle/201004/115430
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KIST Conference Paper > 2013
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