國立虎尾科技大學 |

Contributions to Electromagnetics Modeling for Synchronous Impulse Reconstruction Radar.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Contributions to Electromagnetics Modeling for Synchronous Impulse Reconstruction Radar./
作者:	Chaouch-Bouraoui, Skander.
面頁冊數:	1 online resource (124 pages)
附註:	Source: Dissertation Abstracts International, Volume: 78-12(E), Section: B.
標題:	Electrical engineering. -
電子資源:	click for full text (PQDT)
ISBN:	9780355079050

Contributions to Electromagnetics Modeling for Synchronous Impulse Reconstruction Radar.
Chaouch-Bouraoui, Skander.

Contributions to Electromagnetics Modeling for Synchronous Impulse Reconstruction Radar. - 1 online resource (124 pages)

Source: Dissertation Abstracts International, Volume: 78-12(E), Section: B.

Thesis (Ph.D.)--Howard University, 2017.

Includes bibliographical references

The thesis is aimed at providing a detailed electromagnetic analysis for subsurface object detection systems with applications in the detection of landmines and improvised explosive devices. The research was part of a project entitled "Bayesian Imaging and Advanced Signal Processing for Landmine and Improvised Explosive Devices Detection Using Ground Penetration Radar" funded by United States Army Research Office during 2011-2016, under contract number W911NF-1120039. That is why the analysis is mainly focused on antenna system designs relevant to a novel type of ground penetration radar developed by United States Army Research Laboratory, namely the Synchronous Impulse Reconstruction (SIRE) Radar.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355079050Subjects--Topical Terms:

596380
Electrical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Contributions to Electromagnetics Modeling for Synchronous Impulse Reconstruction Radar.
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245 1 0 $a Contributions to Electromagnetics Modeling for Synchronous Impulse Reconstruction Radar.
264 0 $c 2017
300 $a 1 online resource (124 pages)
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500 $a Source: Dissertation Abstracts International, Volume: 78-12(E), Section: B.
500 $a Adviser: Mihai Dimian.
502 $a Thesis (Ph.D.)--Howard University, 2017.
504 $a Includes bibliographical references
520 $a The thesis is aimed at providing a detailed electromagnetic analysis for subsurface object detection systems with applications in the detection of landmines and improvised explosive devices. The research was part of a project entitled "Bayesian Imaging and Advanced Signal Processing for Landmine and Improvised Explosive Devices Detection Using Ground Penetration Radar" funded by United States Army Research Office during 2011-2016, under contract number W911NF-1120039. That is why the analysis is mainly focused on antenna system designs relevant to a novel type of ground penetration radar developed by United States Army Research Laboratory, namely the Synchronous Impulse Reconstruction (SIRE) Radar.
520 $a Landmines and improvised explosive devices (IEDs) pose major dangers worldwide and have been subject to extensive research. In parallel, an international political effort has been made to ban anti-personnel mines and to help global demining process, a central role being played by the International Campaign to Ban Landmines and its founder, Jody Williams, which jointly received the Nobel Peace Prize in 1997. However, an overall control of landmine and IED production seems impossible at this time and the process is affected by the low cost of mine fabrication and the high cost of its detection and extraction (1 to 100 ratio), in addition to the danger associated to demining activities. Many types of detection systems have been developed including the electromagnetic induction technique, GPR, electrical impedance tomography, X-ray backscatter, infrared/hyperspectral, acoustic seismic, biological methods, florescent and other chemical methods, electrochemical explosive vapor detection, nuclear quadruple resonance and have been shortly presented in the Introductory Chapter. Unfortunately, landmine detection techniques still suffer from high false positive rate, while IEDs are unpredictable and very difficult to detect. As a consequence, they continue to be under intensive research focus, in order to further enhance the capabilities of the current techniques, as well as to combine various techniques into a multisensor system with better performance. SIRE Radar is an example of such advanced technology developed by US Army Research Laboratory and is presented in the Second Chapter along with the analysis of radiation patterns of the component (horn and Vivaldi) antennas. The microstrip patch antenna was also included in this study to reduce the computational complexity of the problems, compared to systems including Vivaldi antenna. An advanced electromagnetic software platform (FEKO) was used to perform the numerical simulations and the analysis of the electromagnetic fields generated by such 3D structures.
520 $a The Third Chapter is dedicated to the analysis of radiation characteristics for Vivaldi antennas in the presence of soil and mine. The soil is modeled by either single layer (half space homogeneous material) or bi-layer models (with the two layers characterized by different electrical properties), taking into account various types of terrains in which the detection systems is deployed. The effects of mine are examined by comparing the results of the E-field simulation in the presence and in the absence of a buried mine both in the far-field region and in the near-field region of the antenna. The variation of reflection coefficient and the radiation patterns with the substrate permittivity of Vivaldi antenna are analyzed. Finally, the Radar Cross Sections for mines with various burial depths and illumination elevation angles are computed.
520 $a The Fourth Chapter explores the radiation patterns and transmission for a subsurface object detection system formed by a horn transmitting antenna and a microstrip receiving antenna. The earth effects on the transmitter (TX) and receiver (RX) antenna radiation patterns and their main characteristics, such as magnitude, orientation, beam width, or secondary lobes, are analyzed by taking into account the soil moisture, soil structure, and soil electrical properties. For the characterization of TX/RX transmission, different distances between the transmitter (TX) and the receiver (RX), the operating frequency and polarization status of the TX/RX pair results are considered. The results can be used for improving the design of the detection system as well as for developing smart control adapted to the environmental conditions.
520 $a A summary of this research work along with the directions of future development are presented in Chapter Five, followed by the dissemination process and the bibliography.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Electrical engineering. $3 596380
655 7 $a Electronic books. $2 local $3 554714
690 $a 0544
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Howard University. $b Electrical Engineering. $3 1186957
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10281015 $z click for full text (PQDT)