The design of a monostatic, ultra wide band,VHF, pulse radar for detection of close-in targets
Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2003. === Ground penetrating radar is currently proving itself as an invaluable tool for the prediction of geological structures in the mining environment. Borehole radar is a specific application of this technolo...
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ndltd-netd.ac.za-oai-union.ndltd.org-sun-oai-scholar.sun.ac.za-10019.1-17092016-01-29T04:02:58Z The design of a monostatic, ultra wide band,VHF, pulse radar for detection of close-in targets Van der Merwe, P. J. Cloete, J. H. University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Ground penetrating radar Radar Dissertations -- Electronic engineering Theses -- Electronic engineering Electrical and Electronic Engineering Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2003. Ground penetrating radar is currently proving itself as an invaluable tool for the prediction of geological structures in the mining environment. Borehole radar is a specific application of this technology, useful in the prediction of the course of rock layers between boreholes ahead of mining. Establishing borehole radar as an industrial tool requires a system that is more userfriendly and easier to deploy than the bi-static radar systems currently available. The development of a monostatic radar system is discussed. It is an ultra wide band, pulse radar system that operates at VHF (10-100 MHz). The system is required to detect reflections from objects 5 m away and further. This translates to a total electromagnetic propagation time of approximately 100 ns or more in the rock medium. The complete design process - from fundamental requirements, through a conceptual design, to a final electronic circuit - is discussed. The design is also built, measured in the laboratory and taken for initial field trails. The following aspects are considered: • Pulse generation by means of an original circuit based on power MOSFETs. • Routing of the transmitted- and received signal between transmitter, receiver and antenna. This is done using a novel, active quasi circulator topology. • Methods of increasing isolation (actively and passively) between transmitter and receiver. • Interfacing with a specific receiver, antenna and data acquisition system. 2010-01-07T13:19:38Z 2010-06-01T08:31:13Z 2010-01-07T13:19:38Z 2010-06-01T08:31:13Z 2003-03 Thesis http://hdl.handle.net/10019.1/1709 en University of Stellenbosch Stellenbosch : University of Stellenbosch |
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Ground penetrating radar Radar Dissertations -- Electronic engineering Theses -- Electronic engineering Electrical and Electronic Engineering |
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Ground penetrating radar Radar Dissertations -- Electronic engineering Theses -- Electronic engineering Electrical and Electronic Engineering Van der Merwe, P. J. The design of a monostatic, ultra wide band,VHF, pulse radar for detection of close-in targets |
description |
Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2003. === Ground penetrating radar is currently proving itself as an invaluable tool for the prediction of
geological structures in the mining environment. Borehole radar is a specific application of this
technology, useful in the prediction of the course of rock layers between boreholes ahead of
mining. Establishing borehole radar as an industrial tool requires a system that is more userfriendly
and easier to deploy than the bi-static radar systems currently available.
The development of a monostatic radar system is discussed. It is an ultra wide band, pulse
radar system that operates at VHF (10-100 MHz). The system is required to detect reflections
from objects 5 m away and further. This translates to a total electromagnetic propagation time
of approximately 100 ns or more in the rock medium.
The complete design process - from fundamental requirements, through a conceptual design,
to a final electronic circuit - is discussed. The design is also built, measured in the laboratory
and taken for initial field trails. The following aspects are considered:
• Pulse generation by means of an original circuit based on power MOSFETs.
• Routing of the transmitted- and received signal between transmitter, receiver and
antenna. This is done using a novel, active quasi circulator topology.
• Methods of increasing isolation (actively and passively) between transmitter and
receiver.
• Interfacing with a specific receiver, antenna and data acquisition system. |
author2 |
Cloete, J. H. |
author_facet |
Cloete, J. H. Van der Merwe, P. J. |
author |
Van der Merwe, P. J. |
author_sort |
Van der Merwe, P. J. |
title |
The design of a monostatic, ultra wide band,VHF, pulse radar for detection of close-in targets |
title_short |
The design of a monostatic, ultra wide band,VHF, pulse radar for detection of close-in targets |
title_full |
The design of a monostatic, ultra wide band,VHF, pulse radar for detection of close-in targets |
title_fullStr |
The design of a monostatic, ultra wide band,VHF, pulse radar for detection of close-in targets |
title_full_unstemmed |
The design of a monostatic, ultra wide band,VHF, pulse radar for detection of close-in targets |
title_sort |
design of a monostatic, ultra wide band,vhf, pulse radar for detection of close-in targets |
publisher |
Stellenbosch : University of Stellenbosch |
publishDate |
2010 |
url |
http://hdl.handle.net/10019.1/1709 |
work_keys_str_mv |
AT vandermerwepj thedesignofamonostaticultrawidebandvhfpulseradarfordetectionofcloseintargets AT vandermerwepj designofamonostaticultrawidebandvhfpulseradarfordetectionofcloseintargets |
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1718163805272276992 |