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Dissertations / Theses on the topic 'Ultra-Wide Band radar'

Author: Grafiati
Published: 4 June 2021
Last updated: 27 July 2025

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1

Le, Kernec Julien. "Contribution of multitones for ultra-wide band software defined radar." Paris 6, 2011. http://www.theses.fr/2011PA066334.

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2

Khodjet-Kesba, Mahmoud. "Automatic target classification based on radar backscattered ultra wide band signals." Thesis, Clermont-Ferrand 2, 2014. http://www.theses.fr/2014CLF22506/document.

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L’objectif de cette thèse est la classification automatique des cibles (ATC) en utilisant les signaux rétrodiffusés par un radar ultra large bande (UWB). La classification des cibles est réalisée en comparant les signatures des cibles et les signatures stockées dans une base de données. Premièrement, une étude sur la théorie de diffusion nous a permis de comprendre le sens physique des paramètres extraits et de les exprimer mathématiquement. Deuxièmement, des méthodes d’extraction de paramètres sont appliquées afin de déterminer les signatures des cibles. Un bon choix des paramètres est import
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3

Cai, Lixin. "Ultra-wide-band model-based synthetic aperture radar imaging through complex media /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488196781735397.

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4

Tian, Tian. "An Ultra-Wide Band Radar Based Noncontact Device for Real-time Apnea Detection." Digital WPI, 2015. https://digitalcommons.wpi.edu/etd-theses/1092.

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"This thesis presents a real-time noncontact system that can monitor an infant's respiration and detect apnea when it occurs. For infants, bedside monitoring of respiratory signals using non-contact sensors is desirable at the hospital and for in-home care. Traditional approach employs acoustic sensors which can hardly detect infant breathing due to low SNR. In this thesis, a novel method is introduced by using a ultra-wideband (UWB) radar that obtains breathing signal from an infant's weak chest vibration. Furthermore, advanced signal processing techniques are proposed to monitor the breathin
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5

Javashvili, Otar. "UWB Antennas for Wall Penetrating Radar Systems." Thesis, University of Gävle, University of Gävle, University of Gävle, Center for RF Measurement Technologies, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-5509.

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<p>Basic properties and new design principles of ultra wideband Vivaldi antennas are presentedand discussed in this paper. The focus will be on the modeling of Vivaldi antenna design curves, by which it is constructed; its simulation results, realization and the measurements.</p><p>According to the aim of this research the discussion starts with the review of the previous researches done for Vivaldi antennas. Introductory part of the report also contains the problem description for the current project and the classification of the goals to be achieved. As a theoretical review, the discussion i
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6

Van, der Merwe P. J. "The design of a monostatic, ultra wide band,VHF, pulse radar for detection of close-in targets." Thesis, Stellenbosch : University of Stellenbosch, 2003. http://hdl.handle.net/10019.1/1709.

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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2003.<br>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 rada
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7

Schuette, David Benjamin. "The Design and Analysis of a Conformal Spiral Antenna Structure for an Ultra-Wide-Band Radar System." Thesis, North Dakota State University, 2016. https://hdl.handle.net/10365/27983.

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This thesis explores the design, simulation, and analysis of two conformal spiral antenna structures that are used for an ultra-wide-band (UWB) bistatic radar. The radar antenna system operates over a frequency range from 0.9 GHz to 6.5 GHz. The UWB spiral antenna was initially derived for a planar substrate, then conformed to the spherical embodiment. A microstrip tapered balun feed structure was designed to provide a balanced signal from the radar to the antennas. This work focuses on how well the newly designed antenna system compares to the radar kit's pro- vided planar bow-tie anten
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8

Fayazi, Seyedeh shaghayegh. "Development of an Ultra Wide-Band(UWB) Synthetic Aperture Radar (SAR)System for Imaging of Near Field Object." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-66918.

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Ultra-wideband (UWB) technology and its use in imaging and sensing have drawnsignicant interest in the last two decades. Extensive studies have contributed toutilize UWB transient scattering for automated target recognition and imagingpurposes. In this thesis a near-eld UWB synthetic aperture radar (SAR) imagingalgorithm is presented.It is shown with measurements and simulation, that it is possible to reconstruct an imageof an object in the near eld region using UWB technology and SAR imaging algorithm.However the nal SAR image is highly aected by unwanted scattered elds at each pixelusually o
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9

Nadir, Houda. "Contribution à la conception d'antennes ultra large bande impulsionnelles d'encombrement réduit." Thesis, Limoges, 2018. http://www.theses.fr/2018LIMO0062/document.

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Ce mémoire présente une méthodologie de conception d’antennes Ultra Large Bande volumiques à ondes progressives, d’encombrement réduit, dédiées au rayonnement d’impulsions ultra-courtes dans une bande de fréquence allant de 300 MHz à 3 GHz. L’objectif est de concilier une large bande de fréquences rayonnées et de bonnes performances de rayonnements transitoires (niveau élevé, signaux brefs) tout en limitant l’encombrement des antennes. L’insertion d’un matériau diélectrique a été associée au design des antennes ULB afin de réduire leurs dimensions. Ceci a conduit à la synthèse et à la caractér
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10

Sow, Mouhamed. "Contribution à la conception de radars géologiques impulsionnels fonctionnant dans un milieu complexe." Thesis, Limoges, 2015. http://www.theses.fr/2015LIMO0011/document.

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Ce travail de thèse présente la conception et la réalisation d'une antenne Ultra Large Bande, de faibles dimensions, destinée à une application géoradar fonctionnant dans un milieu complexe pour une bande fréquentielle comprise entre 70 MHz et 1GHz. Cette étude était inscrite dans le cadre d’un projet Européen dénommé NeTTUN (New Technologies for Tunnelling and Underground works) qui a pour but d’améliorer la sécurité du creusement des tunnels. Dans ce projet, le travail demandé était de réaliser un système géoradar comportant une antenne ULB intégrable sur une tête de coupe d’un tunnelier tou
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11

Sadli, Rahmad. "Étude et développement d'un dispositif routier d'anticollision basé sur un radar ultra large bande pour la détection et l'identification notamment des usagers vulnérables." Thesis, Valenciennes, 2019. http://www.theses.fr/2019VALE0005.

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Dans ce travail de thèse, nous présentons nos travaux qui portent sur l’identification des cibles en général par un radar Ultra-Large Bande (ULB) et en particulier l’identification des cibles dont la surface équivalente radar est faible telles que les piétons et les cyclistes. Ce travail se décompose en deux parties principales, la détection et la reconnaissance. Dans la première approche du processus de détection, nous avons proposé et étudié un détecteur de radar ULB robuste qui fonctionne avec des données radar 1-D (A-scan) à une dimension. Il exploite la combinaison des statistiques d’ordr
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12

Tokgoz, Korkut Kaan. "Broadband Phase Shifter Realization With Surface Micromachined Lumped Components." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614652/index.pdf.

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Phase Shifters are one of the most important building cells of the applications in microwave and millimeter-wave range, especially for communications and radar applications<br>to steer the main beam for electronic scanning. This thesis includes all of the stages starting from the theoretical design stage to the measurements of the phase shifters. In detail, all-pass network phase shifter configuration is used to achieve broadband and ultra wide-band differential phase characteristics. For these reasons, 1 to 2 GHz, 2 to 4 GHz, and 3 to 6 GHz 4-bit, 22.5&deg<br>phase resolution phase shifter re
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13

Inanlou, Farzad Michael-David. "Innovative transceiver approaches for low-power near-field and far-field applications." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52245.

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Wireless operation, near-field or far-field, is a core functionality of any mobile or autonomous system. These systems are battery operated or most often utilize energy scavenging as a means of power generation. Limited access to power, expected long and uninterrupted operation, and constrained physical parameters (e.g. weight and size), which limit overall power harvesting capabilities, are factors that outline the importance for innovative low-power approaches and designs in advanced low-power wireless applications. Low-power approaches become especially important for the wireless transceive
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14

Lamothe, Marc. "Capteurs à ondes élastiques de surface à codage spectral Ultra Large Bande." Thesis, Besançon, 2014. http://www.theses.fr/2014BESA2070/document.

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Le codage spectral Ultra Large Bande (ULB) appliqué aux dispositifs `a ondes élastiques de surface(SAW), exploit ´es comme capteurs passifs interrogeables par liaison radio fréquence, augmente lenombre de données stockées et échangées, et améliore la résolution sur la mesure. L’approcheproposée est de réaliser des dispositifs SAW ULB dans la bande de fréquence 2 GHz − 2.5 GHzréglementée par la norme de communication radio fréquence américaine, après prototypage dansune bande de fréquences plus basses de 200 MHz − 400 MHz. La puissance autorisée sur cettepremière bande est de −41.3 dBm/MHz : po
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15

Maiti, Subrata. "Analytical Modelling of Ultra-Wide Band Ground Penetrating Radar for Characterization of Subsurface Media." Thesis, 2017. http://ethesis.nitrkl.ac.in/8651/1/2017_PhD_511EC407_SubrataMaiti.pdf.

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Ground penetrating radar (GPR) is becoming an attractive sensor for quantitative reconstruction of subsurface media. The accuracy and time-efficiency of GPR detection largely depends on the inverse modelling scheme used. In most of the cases, both accuracy and processing speed can't be achieved together because of the inherent limitation of modelling GPR signal propagation in complex media. Full wave models (FWMs) are most promising approaches to characterize multilayered media. However, they are computationally inefficient due to the requirement of significant integration time over singulari
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