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Partager le résultat de cette recherche Interroger des sources externesContribution à l’élaboration d’un modèle de couplage electromagnétique ligne microstrip - guide d’onde intégré au substrat. / Farouk Grine
Titre : Contribution à l’élaboration d’un modèle de couplage electromagnétique ligne microstrip - guide d’onde intégré au substrat. Type de document : texte imprimé Auteurs : Farouk Grine, Auteur ; Mohamed-Taoufik Benhabiles, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 109 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles. Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Guide d’onde intégré au substrat ligne microstrip transition taper trous d'air Méthode de Raccordement des Modes périodicité dans la permittivité Facteur de qualité cavité filtre Substrate integrated waveguide microstrip line tapered transition air holes mode matching method periodically drilled SIW Quality factor cavity filter الدلیل الموجي المدمج في الركیزة، خط مغیر الانتقال ثقوب الھواء تواتر السماحیة عامل الجودة المرشحات و المرننات Index. décimale : 621 Electronique Résumé : The substrate integrated waveguide (SIW) technology is an emerging design and very promising for the development of circuits and components operating in the region of millimeter waves and microwave. Among major advantages of SIW technology is the ability to manufacture a complete circuit in planar form, using a standard printed circuit board or other plan processing techniques. Transitions between the microstrip line and GIS structures represent another important element related to the SIW components. More importantly, it is required to use low-reflection transitions to microstrip in order to integrate SIW circuits with active components, and therefore it is necessary to create low-reflection transitions so that the component design is independent of
the influences of the transitions.
In this context for improving the transition between the microstrip line and the substrate integrated waveguide, we proposed a novel transition based on the idea of good confinement of electromagnetic fields on both sides of the microstrip line. This transition constructed by placing one row of not metallized air-vias on both sides of the microstrip line.
Thereafter, we will present the studies of the cavities and filters based on substrate integrated waveguide technologies by the mode matching Method and extraction of the S parameters .
Finally, microwave filters are essential components in all types of telecommunication systems. The development of future applications of wireless technologies, filters should be compact, lightweight and exhibiting high selectivity with low insertion loss. To achieve these desired properties simultaneously, we will present a new planar cavity, which we used to design the filter.
The idea of this cavity are based on a periodic artificial modification of the main line material with a permittivity of εr1 by drilling air vias in the substrate to reach a specific permittivity εr2. The resonator cavity shows an unloaded Q factor of 815. The new filter shows improved performance in terms of loss and bandwidth.Diplôme : Doctorat En ligne : ../theses/electronique/GRI7186.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10734 Contribution à l’élaboration d’un modèle de couplage electromagnétique ligne microstrip - guide d’onde intégré au substrat. [texte imprimé] / Farouk Grine, Auteur ; Mohamed-Taoufik Benhabiles, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 109 f. ; 30 cm.
2 copies imprimées disponibles.
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Guide d’onde intégré au substrat ligne microstrip transition taper trous d'air Méthode de Raccordement des Modes périodicité dans la permittivité Facteur de qualité cavité filtre Substrate integrated waveguide microstrip line tapered transition air holes mode matching method periodically drilled SIW Quality factor cavity filter الدلیل الموجي المدمج في الركیزة، خط مغیر الانتقال ثقوب الھواء تواتر السماحیة عامل الجودة المرشحات و المرننات Index. décimale : 621 Electronique Résumé : The substrate integrated waveguide (SIW) technology is an emerging design and very promising for the development of circuits and components operating in the region of millimeter waves and microwave. Among major advantages of SIW technology is the ability to manufacture a complete circuit in planar form, using a standard printed circuit board or other plan processing techniques. Transitions between the microstrip line and GIS structures represent another important element related to the SIW components. More importantly, it is required to use low-reflection transitions to microstrip in order to integrate SIW circuits with active components, and therefore it is necessary to create low-reflection transitions so that the component design is independent of
the influences of the transitions.
In this context for improving the transition between the microstrip line and the substrate integrated waveguide, we proposed a novel transition based on the idea of good confinement of electromagnetic fields on both sides of the microstrip line. This transition constructed by placing one row of not metallized air-vias on both sides of the microstrip line.
Thereafter, we will present the studies of the cavities and filters based on substrate integrated waveguide technologies by the mode matching Method and extraction of the S parameters .
Finally, microwave filters are essential components in all types of telecommunication systems. The development of future applications of wireless technologies, filters should be compact, lightweight and exhibiting high selectivity with low insertion loss. To achieve these desired properties simultaneously, we will present a new planar cavity, which we used to design the filter.
The idea of this cavity are based on a periodic artificial modification of the main line material with a permittivity of εr1 by drilling air vias in the substrate to reach a specific permittivity εr2. The resonator cavity shows an unloaded Q factor of 815. The new filter shows improved performance in terms of loss and bandwidth.Diplôme : Doctorat En ligne : ../theses/electronique/GRI7186.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10734 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité GRI/7186 GRI/7186 Thèse Bibliothèque principale Thèses Disponible
Titre : Contribution à l’étude des transferts thermiques dans les nanofluides. Type de document : texte imprimé Auteurs : Ahlam Ghennai, Auteur ; Rachid Bessaih, Directeur de thèse Mention d'édition : 07/06/2021 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2021 Importance : 136 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie MécaniqueTags : G.Mécanique: Energétique Transfert thermique simulation numérique cavité canal nanofluides génération d’entropie modèle de mélange
Heat transfer numerical simulation cavity channel nanofluids entropy generation mixture model الحمل الحراري المحاكاة العددية التجويف القناة الموائع النانوية توليد الإنتروبيا نموذج الخليطIndex. décimale : 620 Génie Mécanique Résumé :
This thesis deals with the numerical modelling of laminar natural and mixed convection flows of different anofluids types. Numerical simulations were performed using Ansysfluent software, considering three configurations: the square cavity, the cubic cavity, and the inclined channel. The numerical results obtained were validated with those found in the literature. A good agreement was obtained. We present three parts grouping the treated configurations: The first part concerns the study of 2-D natural convection in a square cavity equipped with a pentagonal obstacle, filled with a nanofluid (Cu/Water). The effects of the Rayleigh number Ra, the volumetric concentration of nanoparticles , the aspect ratio r and the orientation of the block were discussed The second part examines the 3-D mixed convection inside a cubic cavity with a heated square-section obstacle. This study compares the single carbon nanotube CNT/water nanofluid and the hybrid CNT-Copper/water nanofluid with different concentration ratios, Richardson number Ri, Reynolds number Re, and block aspect ratio r. In this case, three correlations have been developed to predict the average Nusselt number Nu's variation as a function of the chosen parameters. The third part deals with the numerical study of laminar mixed convection with entropy generation in an inclined channel with four heated blocks, traversed by a hybrid Al2O3- Cu/water nanofluid. In this part, the use of a two-phase mixing model approach was considered to demonstrate the effects of several parameters such as Ri, Re, , θ (the channel tilt), and the position of the block on Nusselt number, entropy generations, and Bejan number. Two different correlations were also determined to express Nu's average values for the position of aligned and non-aligned blocks.
Diplôme : Doctorat En ligne : ../theses/gmecanique/GHE7758.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11591 Contribution à l’étude des transferts thermiques dans les nanofluides. [texte imprimé] / Ahlam Ghennai, Auteur ; Rachid Bessaih, Directeur de thèse . - 07/06/2021 . - جامعة الإخوة منتوري قسنطينة, 2021 . - 136 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie MécaniqueTags : G.Mécanique: Energétique Transfert thermique simulation numérique cavité canal nanofluides génération d’entropie modèle de mélange
Heat transfer numerical simulation cavity channel nanofluids entropy generation mixture model الحمل الحراري المحاكاة العددية التجويف القناة الموائع النانوية توليد الإنتروبيا نموذج الخليطIndex. décimale : 620 Génie Mécanique Résumé :
This thesis deals with the numerical modelling of laminar natural and mixed convection flows of different anofluids types. Numerical simulations were performed using Ansysfluent software, considering three configurations: the square cavity, the cubic cavity, and the inclined channel. The numerical results obtained were validated with those found in the literature. A good agreement was obtained. We present three parts grouping the treated configurations: The first part concerns the study of 2-D natural convection in a square cavity equipped with a pentagonal obstacle, filled with a nanofluid (Cu/Water). The effects of the Rayleigh number Ra, the volumetric concentration of nanoparticles , the aspect ratio r and the orientation of the block were discussed The second part examines the 3-D mixed convection inside a cubic cavity with a heated square-section obstacle. This study compares the single carbon nanotube CNT/water nanofluid and the hybrid CNT-Copper/water nanofluid with different concentration ratios, Richardson number Ri, Reynolds number Re, and block aspect ratio r. In this case, three correlations have been developed to predict the average Nusselt number Nu's variation as a function of the chosen parameters. The third part deals with the numerical study of laminar mixed convection with entropy generation in an inclined channel with four heated blocks, traversed by a hybrid Al2O3- Cu/water nanofluid. In this part, the use of a two-phase mixing model approach was considered to demonstrate the effects of several parameters such as Ri, Re, , θ (the channel tilt), and the position of the block on Nusselt number, entropy generations, and Bejan number. Two different correlations were also determined to express Nu's average values for the position of aligned and non-aligned blocks.
Diplôme : Doctorat En ligne : ../theses/gmecanique/GHE7758.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11591 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité GHE/7758 GHE/7758 Thèse Bibliothèque principale Thèses Disponible
Titre : Étude des composants à base de cristaux photoniques : Application dans le domaine du démultiplexage et de la détection. Type de document : texte imprimé Auteurs : Safia Arafa, Auteur ; Mohamed Bouchemat, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 150 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : cristaux photoniques l'optique intégrée biocapteurs démultiplexeur cavité FDTD Photonic crystal integrated optics biosensors demultiplexer cavity لبلورات الضوئية البصريات المتكاملة أجهزة الاستشعار البيولوجية مزيلات الدمج التجويف Index. décimale : 621 Electronique Résumé : Nowadays, the development of biological sensors has become a major issue in order to meet the current and the
future needs in diverse areas demanded. Real-time detection or analysis should be preferred and the response should be easy to read and extremely fast. In parallel, the progress of nanotechnologies and in particular those of photonic crystals, which make it possible to manipulate the light at nanometric resolution, and thus at the biomolecule scale, offers the possibility of achieving a new high-performed detection platform.
In this context, this thesis aims to study and to design refractive index biosensors based on photonic crystals. The structures proposed are essentially based on a H0 cavity coupled waveguide system. The main objective of our work remains the enhancement of light confinement within the cavity area. In the first part of this work we analyze in detail the influence of the cavity geometry on the detection performances. Thus, we present a configuration based on ringed air holes to improve the detection properties. In order to integrate several detection units in the same photonic crystal platform, the wavelength division demultiplexing (WDM) technique to spatially separate the responses of the integrated biosensors will be studied: Two structures of demultiplexers based on a selective filtering will also be presented. As for the case of a single biosensor and based on this technique the configurations of classical and ringed biosensor array will be studied and simultaneously evaluated. The optical properties of these photonic structures will be numerically evaluated by performing simulations based on the finite difference time domain (FDTD) method. The obtained results indicate that the response of each sensor unit shifts independently in terms of refractive index variations. Accordingly, a sensitivity of 450 nm / RIU and a crosstalk of less than -43.78 dB have been achieved for the ringed configuration, while maintaining a quality factor as high as 5.74×104. These features make the designed structure a promising platform for performing monolithic integration and high multiplexed label-free detection.Diplôme : Doctorat En ligne : ../theses/electronique/ARA7278.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10893 Étude des composants à base de cristaux photoniques : Application dans le domaine du démultiplexage et de la détection. [texte imprimé] / Safia Arafa, Auteur ; Mohamed Bouchemat, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 150 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : cristaux photoniques l'optique intégrée biocapteurs démultiplexeur cavité FDTD Photonic crystal integrated optics biosensors demultiplexer cavity لبلورات الضوئية البصريات المتكاملة أجهزة الاستشعار البيولوجية مزيلات الدمج التجويف Index. décimale : 621 Electronique Résumé : Nowadays, the development of biological sensors has become a major issue in order to meet the current and the
future needs in diverse areas demanded. Real-time detection or analysis should be preferred and the response should be easy to read and extremely fast. In parallel, the progress of nanotechnologies and in particular those of photonic crystals, which make it possible to manipulate the light at nanometric resolution, and thus at the biomolecule scale, offers the possibility of achieving a new high-performed detection platform.
In this context, this thesis aims to study and to design refractive index biosensors based on photonic crystals. The structures proposed are essentially based on a H0 cavity coupled waveguide system. The main objective of our work remains the enhancement of light confinement within the cavity area. In the first part of this work we analyze in detail the influence of the cavity geometry on the detection performances. Thus, we present a configuration based on ringed air holes to improve the detection properties. In order to integrate several detection units in the same photonic crystal platform, the wavelength division demultiplexing (WDM) technique to spatially separate the responses of the integrated biosensors will be studied: Two structures of demultiplexers based on a selective filtering will also be presented. As for the case of a single biosensor and based on this technique the configurations of classical and ringed biosensor array will be studied and simultaneously evaluated. The optical properties of these photonic structures will be numerically evaluated by performing simulations based on the finite difference time domain (FDTD) method. The obtained results indicate that the response of each sensor unit shifts independently in terms of refractive index variations. Accordingly, a sensitivity of 450 nm / RIU and a crosstalk of less than -43.78 dB have been achieved for the ringed configuration, while maintaining a quality factor as high as 5.74×104. These features make the designed structure a promising platform for performing monolithic integration and high multiplexed label-free detection.Diplôme : Doctorat En ligne : ../theses/electronique/ARA7278.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10893 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ARA/7278 ARA/7278 Thèse Bibliothèque principale Thèses Disponible
Titre : Étude de cristaux photoniques en silicium pour l'application à la biodétection Type de document : texte imprimé Auteurs : Dallel Benelarbi, Auteur ; Touraya Bouchemat, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 120 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : cristaux photoniques silicium biocapteurs guide d'onde cavité SOI sensibilité FDTD-2D photonic crystals silicon biosensors waveguide cavity sensitivity البلورات الضوئية سيليسيوم المستشعرات الضوئية الدليل الموجي التجويف .FDTD-2D الحساسبةSOI Index. décimale : 621 Electronique Résumé : This thesis is dedicated to the study and design of new structures for optical detection. Indeed, the development of these optical devices has a growing and particular interest, particularly for targeting and identifying biological species. For this purpose, the photonic crystal-based components (CPs) have been widely exploited in the field of bio-detection.
Silicon is an ideal candidate designated as a support material for the realization of these devices. In this context, new coupling techniques between waveguide and optical cavity based on planar photonic crystals, made on a silicon-on-insulator (SOI) substrate, have been developed. To do this, we are modeling these bio detectors, optimizing their key parameters such as the quality factor and sensitivity to the optical index of the external environment, using commercial software Fullwave and Crystalwave that exploit the finite difference method in the two-dimensional time domain (FDTD-2D). We first studied the parallel coupling between a resonant cavity and a waveguide (W1) for application to the detection of DNA biomolecules. The originality of this study is to consider several sensors on a single platform, and to demonstrate that each sensor could detect a target independently and without interaction with others, without losses, and this, by acting on the parameters influencing the
essential characteristics, we note a high sensitivity and a low limit of detection. As for the second geometry studied, it consists of another coupling path, the latter comprises two sections of guides W1 between which has been arranged a ring cavity. We have also optimized the different structural parameters for this configuration, in order to improve the sensitivity and the quality factor in order to obtain another type of high-performance sensor, namely the temperature sensor. For this, we consider the evolution of the sensitivity as a function of the change in the temperature of the water, convincing results were noted.
Diplôme : Doctorat En ligne : ../theses/electronique/BEN7253.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10845 Étude de cristaux photoniques en silicium pour l'application à la biodétection [texte imprimé] / Dallel Benelarbi, Auteur ; Touraya Bouchemat, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 120 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : cristaux photoniques silicium biocapteurs guide d'onde cavité SOI sensibilité FDTD-2D photonic crystals silicon biosensors waveguide cavity sensitivity البلورات الضوئية سيليسيوم المستشعرات الضوئية الدليل الموجي التجويف .FDTD-2D الحساسبةSOI Index. décimale : 621 Electronique Résumé : This thesis is dedicated to the study and design of new structures for optical detection. Indeed, the development of these optical devices has a growing and particular interest, particularly for targeting and identifying biological species. For this purpose, the photonic crystal-based components (CPs) have been widely exploited in the field of bio-detection.
Silicon is an ideal candidate designated as a support material for the realization of these devices. In this context, new coupling techniques between waveguide and optical cavity based on planar photonic crystals, made on a silicon-on-insulator (SOI) substrate, have been developed. To do this, we are modeling these bio detectors, optimizing their key parameters such as the quality factor and sensitivity to the optical index of the external environment, using commercial software Fullwave and Crystalwave that exploit the finite difference method in the two-dimensional time domain (FDTD-2D). We first studied the parallel coupling between a resonant cavity and a waveguide (W1) for application to the detection of DNA biomolecules. The originality of this study is to consider several sensors on a single platform, and to demonstrate that each sensor could detect a target independently and without interaction with others, without losses, and this, by acting on the parameters influencing the
essential characteristics, we note a high sensitivity and a low limit of detection. As for the second geometry studied, it consists of another coupling path, the latter comprises two sections of guides W1 between which has been arranged a ring cavity. We have also optimized the different structural parameters for this configuration, in order to improve the sensitivity and the quality factor in order to obtain another type of high-performance sensor, namely the temperature sensor. For this, we consider the evolution of the sensitivity as a function of the change in the temperature of the water, convincing results were noted.
Diplôme : Doctorat En ligne : ../theses/electronique/BEN7253.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10845 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEN/7253 BEN/7253 Thèse Bibliothèque principale Thèses Disponible
Titre : Génération d’entropie due au refroidissement par convection naturelle d’un nanofluide Type de document : texte imprimé Auteurs : Abd el malik Bouchoucha, Auteur ; Rachid Bessaih, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 159 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie MécaniqueTags : Nanofluide Génération d’entropie Convection naturelle Cavité Nanofluid Entropy generation Natural convection Cavity محلول نانوني توليد ا ألنتروبي الحمل الحراري الطبيعي وعاء Index. décimale : 620 Génie Mécanique Résumé : Venous thromboembolism (VTE) is a multifactorial disease in which the genetic
component is important.Many genetic risk factors have been identified for causing VTE.
Most of them affect the function of natural anticoagulant pathways, particularly the prote
Diplôme : Doctorat En ligne : ../theses/gmecanique/BOU7046.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10553 Génération d’entropie due au refroidissement par convection naturelle d’un nanofluide [texte imprimé] / Abd el malik Bouchoucha, Auteur ; Rachid Bessaih, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 159 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie MécaniqueTags : Nanofluide Génération d’entropie Convection naturelle Cavité Nanofluid Entropy generation Natural convection Cavity محلول نانوني توليد ا ألنتروبي الحمل الحراري الطبيعي وعاء Index. décimale : 620 Génie Mécanique Résumé : Venous thromboembolism (VTE) is a multifactorial disease in which the genetic
component is important.Many genetic risk factors have been identified for causing VTE.
Most of them affect the function of natural anticoagulant pathways, particularly the prote
Diplôme : Doctorat En ligne : ../theses/gmecanique/BOU7046.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10553 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/7046 BOU/7046 Thèse Bibliothèque principale Thèses Disponible
