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

Title
Low Power Monostatic Pulse Borehole Radar with an Active Circulator and an Absorptive Switch
Authors
조재형육종관김세윤
Keywords
radar; Active circulator; borehole; borehole radar; pulse; single-hole; monostatic; tunnel detection
Issue Date
2013-11
Publisher
Asia-Pacific Microwave Conference
Citation
, 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 airfilled 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
http://pubs.kist.re.kr/handle/201004/46540
Appears in Collections:
KIST Publication > Conference Paper
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