Teses / dissertações sobre o tema "Composants microonde"
Crie uma referência precisa em APA, MLA, Chicago, Harvard, e outros estilos
Veja os 50 melhores trabalhos (teses / dissertações) para estudos sobre o assunto "Composants microonde".
Ao lado de cada fonte na lista de referências, há um botão "Adicionar à bibliografia". Clique e geraremos automaticamente a citação bibliográfica do trabalho escolhido no estilo de citação de que você precisa: APA, MLA, Harvard, Chicago, Vancouver, etc.
Você também pode baixar o texto completo da publicação científica em formato .pdf e ler o resumo do trabalho online se estiver presente nos metadados.
Veja as teses / dissertações das mais diversas áreas científicas e compile uma bibliografia correta.
Mothe, Nicolas. "Composants optiques à fibres multiples : applications à la sommation opto-microonde et aux fibres microstructurées mono et multicoeurs". Limoges, 2009. https://aurore.unilim.fr/theses/nxfile/default/f0e822b2-4a8a-43d2-91ee-aa8e60c84380/blobholder:0/2009LIMO4042.pdf.
Texto completo da fonteThese research works presented in this manuscript aim at designing, realizing and characterizing the optical summation function of hyperfrequency signals. This operation constitutes a key element of the future phased array antennas and of the opto-hyperfrequency signal processing. The principle, commonly admitted, to realize the optical summation relies on the spatial separation of the different signals on the photodiode. This limitation aims to suppress the homo/heterodyne noises detrimental for the correct addition of the microwave signals. However, we numerically and experimentally demonstrate that this principle is not funded. The solution proposed here consists in encapsulating standard optical fibers in a silica tube and in tapering the whole to desired dimensions. A summator with 14 channels is fabricated this way. No fluctuation of the summed hyperfrequency power is observed even if the signals overlap significantly over the photodiode
Djebbi, Roua. "Contribution à la réalisation par technologies additives hybrides de composants microondes 3D multi-matériaux". Electronic Thesis or Diss., Limoges, 2024. http://www.theses.fr/2024LIMO0110.
Texto completo da fonteThis thesis focuses on improving the performance of 3D multi-material microwave components produced through hybrid additive manufacturing technologies, utilizing sintering techniques to optimize the electrical conductivity of printed metallic tracks, and the study of various high-frequency (HF) characterization methods to assess these conductors. The bibliographic study led to the selection of direct printing technologies such as aerosol jet printing (AJP) and material micro-extrusion (nScrypt) for metallic layers, as well as 3D printing of PEKK polymer. One of the main contributions of this work lies in the integration of in situ sintering techniques, such as laser sintering, directly integrated into the nScrypt machine, allowing for the sintering of metallic deposits immediately after printing to maximize their conductive properties. Ohmic sintering was also explored as a complementary method, particularly for metal lines printed via micro-extrusion, with promising results for significantly improving conductivity. In parallel, innovative methods for HF conductivity characterization were developed. These approaches rely on specific probes enabling both contactless and direct contact characterizations, allowing for the measurement of HF conductivity over small areas and the mapping of the conductivity of printed metallic surfaces while accounting for surface roughness. This work is part of a broader goal to integrate these innovations into a hybrid additive manufacturing system, thereby optimizing the performance of 3D microwave components (transmission lines, resonators, etc.)
Madjour, Kamel. "Réalisation et caractérisation de détecteurs submillimétriques et térahertz par des composants à effets de champs à base de nitrure de Gallium". Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10178.
Texto completo da fonteThis thesis relates to the fabrication and the characterization of different types of Gallium nitirde based high electron mobility transistors (GaN/AlGaN heterojunction based HEMT) as millimeter and terahertz radiations detectors. The first part of this work presents a state of the art of different types of THz radiation detectors either by electronics, optics or optoelectronics approaches. This part allows a comparison of their performances. The second part deals with design and process technologies to the fabrication of GaN/AlGaN based devices. This part explains particular difficulties encounterd and solutions omplemented in the process fabrication of gratting-gate transistors. The third part describe the experimental results in free-space, up to 550GHz, of these different types of detectors (i.e. NEP, SNR, integrated horn antenna...). This part outlines the THz real-time imaging performed for the first time with GaN/AlGaN based detectors. The last part deals with the study of the intrinsic performance of these detectors. This study is based on the resistive-mixing theory in HEMTs. Modeling of the nonlinear behavior of transistors is achieved. This part relies on resistive-mixing measurements made using a new type of an on-wafer measurement bench developed in our laboratory. In conclusion, a report on the performances of all detectors studies in this thesis is done. This conclusion attempts to answer in the reasonable questions
Pacchini, Sebastien. "Etude des potentialités des nanotubes de carbone dans le domaine hyperfréquence : Application à l'élaboration de matériaux nanocomposites et contribution à la miniaturisation de composants électromécaniques (NEMS)". Phd thesis, Université Paul Sabatier - Toulouse III, 2008. http://tel.archives-ouvertes.fr/tel-00366700.
Texto completo da fonteGonzàlez, José Manuel. "Composants innovants recongurables par voie optique pour des applications microondes". Limoges, 2011. https://aurore.unilim.fr/theses/nxfile/default/f3a2c16b-fd3c-47e6-9923-5f9ad25a39cf/blobholder:0/2011LIMO4048.pdf.
Texto completo da fonteThis work focuses on novel optically reconfigurable components for microwave applications, the main objective being to propose alternative solutions to commonly used tuning methods such as MEMS or diodes. In this work, we have investigated photosensitive material characterization at microwave frequencies, and both direct and indirect methods of optical reconfigurability. To provide context for this thesis, the first part is dedicated to a bibliographic review of reconfigurable circuits and methods, thus giving an overview of the technologies used at present and showing the interest for using optical control. The second part of this dissertation is about test structures for characterizing photosensitive materials, including a presentation of materials such as Vanadium dioxide or Cadmium sulfide, among others. In the third chapter of this thesis, frequency tunable structures exploiting direct optical control are studied. The structures presented include a “proof of concept” tunable LTCC filter, a 3D dielectric resonator based on photoconductive materials, and a tunable filter based on the change of a material’s relative permittivity. The last part of this work focuses on indirect optical control showing an opto‐RF switch based on a standard Si CMOS fabrication technology
Tassetti, Charles-Marie. "Conception et réalisation de micro-inductances variables, micro-usinées, pour applications radiofréquences et microondes". Paris 11, 2005. http://www.theses.fr/2005PA112079.
Texto completo da fonteDue to the increasing need of very small passive component chips, which represent a large surface on the cell phone electronic board, many laboratories try to integrate these passive components, with constant electric characteristics, into RF application chips. The research on tunable micro-components is still insignificant, despite the important market the future communication systems can represent. The study presented in this Ph. D. Report gives a concrete response to the conception and realization of tunable MEMS inductors. The first chapters focus on the feasibility of such components, and describe their design and fabrication process flow. The solution used to realize tunable MEMS inductors is based on magnetic coupling variations, between electric circuits, produced by mechanical displacements. Such a method gives large and continuous inductor variation ratios. The electric model proposed for this tunable micro-inductor has been validated by measurements. The last chapter gives some examples of tunable RF functions realized using tunable MEMS inductors and tunable MEMS capacitors. Measurements performed on these demonstrators validate the feasibility of tunable RF functions with continuous variation ratios
Husse, Emmanuelle. "Conception, réalisation et caractérisation de composants passifs microondes supraconducteurs à haute température critique". Lille 1, 1996. http://www.theses.fr/1996LIL10184.
Texto completo da fonteRammal, Rim. "Conception de Composants Microondes Innovants basés sur de Nouveaux Procédés Technologiques de Fabrication". Limoges, 2014. https://aurore.unilim.fr/theses/nxfile/default/c41c2fd1-8953-4bff-b464-be12c3d6ef4a/blobholder:0/2014LIMO4014.pdf.
Texto completo da fonteThis thesis is devoted to the characterization of an innovative inkjet printing technology for the fabrication of multilayer and multi-material structures. We will use this technology to create printed single and multilayer interdigitated filters. The multilayer aspects open the way to work on tunable structures that could be the same type as the interdigitated multilayer filter. The first chapter consists of a literature study on multilayer technologies and in particular the inkjet printing technology. In the second chapter, we tested this technology by printing 2-D patterns with –made with a silver ink in order to establish different design rules to be applied for the creation of RF components. A multilayer printing approach (silver and ceramic inks) is validated after a development of the ceramic-based ink developed with the Heraeus 51K65 dielectric material which can be fired at low temperature (800°C). The third section presents a multilayer filter fabricated by this technology in order to achieve footprint reduction compared to a silver monolayer interdigitated filter. The fourth chapter presents a simple planar system to easily retrieve an equivalent model of a varactor (Rs and Cj) to serve as a component of frequency tuning. Different examples of tunable resonators using such varactor are finally presented
Paillot, Thomas. "Etude de composants MEMS RF pour les circuits hyperfréquences et millimètriques". Limoges, 2005. https://aurore.unilim.fr/theses/nxfile/default/4476a58f-9a3c-467d-93cf-45881d3a1e6a/blobholder:0/2005LIMO0040.pdf.
Texto completo da fonteThis work presents MEMS component applications for radio frequency and millimeter wave circuits. These components have been used for the realization of switch functions and also integrated to "classic" RF circuits, resonators and filters, in order to obtain frequency tunable circuits. Several circuits have been presented, low loss capacitive switches in Ka band, capacitive switches for high power applications and finally tunable resonators and filters. A particular study has been made so as to demonstrate microstrip tunable circuits. The measurements obtained on a two pole tunable filter using four MEMS variable capacitors show the potential of micro electromechanical components to realize high quality factor circuits
WONG, MAN-FAI. "Methode des elements finis mixtes 3d appliquee a la caracterisation des composants passifs microondes et millimetriques". Paris 7, 1993. http://www.theses.fr/1993PA077219.
Texto completo da fonteHarkouss, Youssef. "Application de réseaux de neurones à la modélisation de composants et de dispositifs microondes non linéaires". Limoges, 1998. http://www.theses.fr/1998LIMO0040.
Texto completo da fontePiquet, Jérôme. "Caractérisation et modélisation HF de composants passifs MIM intégrés pour circuits avancés". Chambéry, 2007. http://www.theses.fr/2007CHAMS012.
Texto completo da fonteThe work presented here concerns on the study of the advanced integrated passive components and more particularly MIM capacitors (Metal-Insulator-Metal) with damascene architecture. Their compatibility with microelectronics technologies, led us to study this new architecture of capacity integrating Si3N4 in order to prepare the next generations of integrated circuits. We developed several methods of characterization of MIM capacitor on a broad frequency range (40MHz-40GHz). Thus several approaches making it possible to define various equivalent models, were validated. We also defined several quality standards (cut-off frequency, quality factor, criterion of merit C/L) which can quickly :valuate the performances of the component in high frequency range. The main objective of this work was [) be able to quantify and predict the high frequency performances of the MIM capacitors. Thus we brought replies, compared to the performances of MIM capacitors on : The impact of topologies of electrodes (grid or comb) on the quality factor and the cut-off frequency. The influence of the integration of new high permittivity insulators (Ta20s, HfO2) on the capacitors HF performances. The potentiality of integration of new architectures in three dimensions and we showed that they presented very promising HF performances. This work answers a great number of questions put by the technologists. Now we are able to take the better technological orientations for realization of MIM capacitors, and we manage to have the best optimization of the future generations of integrated circuits
Delage, Anthony. "Technologie aérosol appliquée à l'intégration 3D et aux composants hyperfréquences". Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0113.
Texto completo da fonteThis thesis work is focused on the development of the Aerosol Jet printing (AJP) technology to produce microwave components in the millimeter frequency band and to address 3D component integration issues. The first chapter is devoted to a bibliographic study to compare the different additive technologies available on the market in order to position the AJP in relation to the state of the art. The second chapter is dedicated to the selection and characterization of metallic and dielectric materials that can be printed by AJP. These various tests lead to the production of microwave and millimeter waves components on flat ceramic substrates. The third chapter is devoted to the selective metallization by AJP of 3D ceramic objects produced by stereolithography. More specifically, the various tests will eventually allow ceramic volumetric filters operating at millimeter waves to be selectively metallized. The fourth chapter concerns the design, study and implementation of new types of hybrid components and interconnects that can be fully printed by AJP. This work is original through the use of an innovative additive selective metallization technology applied to microwave and millimeter wave passive components
Larique, Emmanuel. "Développement d'une approche hybride couplant des simulateurs électromagnétique et circuit pour la modélisation de composants microondes actifs". Limoges, 2000. http://www.theses.fr/2000LIMO0011.
Texto completo da fonteKhoder, Khaled. "Optimisation de composants hyperfréquences par la technique des plans à surfaces de réponses". Limoges, 2011. http://aurore.unilim.fr/theses/nxfile/default/a926d925-ee5e-4535-97ce-f942727d1b59/blobholder:0/2011LIMO4039.pdf.
Texto completo da fonteThis work focuses on the application of the response surface methodology to optimize microwave components. Components are seen as black boxes receiving input parameters and providing outputs. The relationship between the inputs (factors) and outputs (responses) is described by a polynomial obtained by means of a statistical study. This last one is conducted in accordance with the responses surfaces methodology. We make the required mathematical and statistical analyses to validate the polynomial models used and then a multicriteria optimization which consists in transforming all the responses in individual desirability functions. An overall desirability function defined from these individual desirability functions associated with various objectives, must be then maximized. The use of a minimization algorithm (BFGS) from the models provided by the designs of experiments yielded a large number of local minima with restricted domain of input factors to identify a solution of high quality. When there are correlations between factors, it is impossible to implement a classic design to solve an optimization problem, the geometry of the experimental filed loses its regularity, optimal designs must be used. We study in the latter part of this thesis the criteria on which we based to build an optimal design illustrated by examples of optimization of two kinds of resonators
Cathebras, Gyslaine. "Appareil automatique de mesure de bruit dans la gamme 5 Mhz-800 Mhz, géré par microordinateur (IBM PC)". Montpellier 2, 1989. http://www.theses.fr/1989MON20072.
Texto completo da fonteDerycke, Alain. "Etudes théoriques et expérimentales des modules préaccordés radiaux : application à l'intégration des composants en ondes millimétriques". Lille 1, 1986. http://www.theses.fr/1986LIL10090.
Texto completo da fonteKhalfallaoui, Abderrazek. "Dépôt par voie sol-gel de films ferroélectriques : caractérisation à large gamme de fréquences et réalisation de composants microondes accordables". Littoral, 2010. http://www.theses.fr/2010DUNK0288.
Texto completo da fonteThis work is in the context of ferroelectrics thin film and their application in tunable microwave devices. After a presentation of the material BaSrTiO3 (BST) and a state of the art of tunable devices, we present the development stage of the film BST sol-gel process. BST thin films with various dopants were grown by sol-gel method on platinized silicon and Saphir substrates. Their dielectric properties were investigated at low frequency (less than 1 MHz) on silicon with parallel-plate capacitors and at high frequency (up to 30 GHz) with interdigitated capacitors on sapphir substrate. The results depends on the nature of the dopant and show the addition of magnesium to reduce the dielectric loss tangent up 0. 7% at 1MHz. On the other hand, potassium is a good candidate as dopant of BST thin film to improve the tunability compared to undoped BST film. Then we investigate the possibility to integrate ferroelectric thin films in microwave devices. The BST50/50 thin films deposited on sapphire have been investigated using interdigitated capacitances (IDC). We performed measurements as a function of the spacing between fingers of the IDC in a frequency rnge from 1 to 30GHz. It turned out that the spacing between fingers has a major impact on the dielectric properties of BST deposited on IDC. Finally, analogue phase shifter circuits were realized and characterized. In terms of phase, we managed to obtain a phase shift of 45° by applying a low voltage of 7. 5 volts to 40 GHz. The performances obtained show the potential of ferroelectric thin films of BST in microwave in light of achieving tunable frequency components
Mahdi, Najib. "Développement d’une bibliothèque de techniques d’optimisation de formes pour la conception assistée par ordinateur de composants et de circuits hyperfréquences". Limoges, 2012. http://aurore.unilim.fr/theses/nxfile/default/9f7aec06-87a8-41f9-8fb8-8abb610f0ddf/blobholder:0/2012LIMO4043.pdf.
Texto completo da fonteThe work presented in this manuscript aims to develop a library of structural optimization techniques for advanced computer aided design (CAD) of microwave components and circuits. Structural optimization techniques allow establishing a solution for a given electromagnetic (EM) problem optimizing the shape and the topology of microwave devices (the metal distribution (2D) on a substrate or the dielectric material distribution in 3D) according to electric specifications. In the framework of this thesis, different local and global structural optimization techniques are combined into a library for the design of microwave devices. These techniques are applicable to a variety of microwave components and circuits in order to attain an optimized performance compared to a conventional method. The novelty of this library is to combine several techniques for optimizing the structure dimensions, its shape and/or its topology. The elaborated library is applied to the design of microwave filters for telecommunication satellites
Pottrain, Alexandre. "Caractérisation non linéaire des composants silicium jusque 220 GHz". Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10186.
Texto completo da fonteMany applications are emerging at millimeter wave frequencies (radar, imaging, satellite or point to point communications). The ‘DotFive’ project gather industries and laboratories working in microelectronics field (STMicroelectronics, Infineon, IMEC, IHP, Dresden University,.) with the aim to product silicon devices with fMAX>500 GHz for year 2013. In this context, STMicroelectronics recently published results on SiGe HBT showing fMAX>400 GHz. The state of the art in this field is 0.5 THz (Dotfive). Thanks to these high performances, silicon technology seems to be a good challenger for millimeter wave applications. Main advantages of this technology are its ability to propose low cost production and the capability to integrate digital and radiofrequency applications on a single chip. However, non linear performances of the silicon technology have never been studied at millimeter wave frequencies. To this aim, non linear test bench are needed. Before this PhD, I.E.M.N. and STMicroelectronics were limited to 40 GHz. Thus, the goal of this thesis focus on the development of load pull test bench up to 220 GHz. First a W band (75 GHz-110 GHz) load pull test bench has been developed. The main innovation is the ability to extract non linear S11 parameter, in order to obtain an extremely high precision. Then, a G band load pull test bench has been developed with integrated impedance tuner for load impedance variation. The use of integrated impedance tuner was justified by unavailability of external tuner and the high probe losses at these frequencies. The designed integrated tuners have to respect fixed specifications for covered smith chart area and linearity. Due to the difficulty to find fast power measurement devices, we also developed a diode detector on III-V technology.These previously developed test bench allow studies on non linear behavior of CMOS and BiCMOS devices and on the mains physical effects (thermal effect, breakdown,…) which limit power performances from DC to 200 GHz. We will see that BiCMOS technology offer state of the art power density measured at 94 GHz. Finally, integration of a complete load pull test bench on silicon wafer is envisaged. This work have been done for the common laboratory I.E.M.N./STMicroelectronics
Derozier, Dominique. "Spectroscopie millimétrique de composants polaires des atmosphères planétaires : déterminations expérimentale et théorique de la dépendance en température de la relaxation collisionnelle". Lille 1, 1987. http://www.theses.fr/1987LIL10004.
Texto completo da fonteVandenbrouck, Simon. "Composants plasmoniques à base d’hétérojonction AlGaN/GaN pour les applications terahertz". Thesis, Lille 1, 2009. http://www.theses.fr/2009LIL10165/document.
Texto completo da fonteThis work studies the TeraHertz detection and generation thanks to plasma wave oscillation in AlGaN/GaN quantum well. After describing the nature of a plasma, we calculate the plasma resonant frequency and introduce the Dyakonov-Shur theory. For a more comprehensive purpose we introduce a simplified structure compared to microwave transistors, as a plasmonic wave guide. The aim of this structure is to study the interaction between the plasma wave and the electromagnetic one. We show in this report transmission measurement of this structure in THz regime thanks to a measurement set up based on a femtoseconde laser. This study shows that at room temperature, the plasma wave is over dumped which make them critical for measurement. The model developed in this work shows that plasma wave oscillation could be more easily characterized at 77K. Finally field effect transistors based on GaN nanowires have been processed. This study result of the collaboration between IEMN laboratory and Charles Lieber research group based at Harvard University. This work has demonstrated for the first time the potentiality of such a kind of nanowire for future applications. We show in this report how the transfer between growth substrate and the dedicated one for device processing has been handled. The aim of this work was to process transistors based on nanowires for microwave applications. The conclusion of this work shows that extrinsic parameters of those transistors are huge compared to nanowires intrinsic ones. Therefore an innovative deembedding method has been developed for intrinsic parameters extraction. We show 12 GHz maximum available gain cut-off frequency which makes this result as the state of the art
Tamen, Beaudouin. "Modélisation du bruit dans les composants en régime de fonctionnement grand signal : application à la conception de circuits intégrés non linéaires faible bruit pour les télécommunications". Lille 1, 2000. http://www.theses.fr/2000LIL10102.
Texto completo da fonteAbessolo, Bidzo Dolphin. "Méthodologies de test pour la caractérisation radiofréquence et hyperfréquence de composants microélectroniques avancés et systèmes intégrés en vue de leur modélisation et du contrôle non destructif". Caen, 2007. http://www.theses.fr/2007CAEN2038.
Texto completo da fonteThis PhD dissertation is devoted to the study of test methodologies for RF and microwave characterization of microelectronics components and integrated circuits. Traditionally, this type of characterization is performed in the frequency domain. This manuscript highlights that time domain analysis should not be kept away from RF characterization flow. The first part of this paper reviews various calibration techniques and de-embedding methods for on-wafer RF and microwave characterization. In the second part, the use of time domain reflectometry (TDR) is developed. After a brief recall of TDR principle, this non-destructive testing methodology is successfully applied to detect, to identify and to localize electrical failures in complex integrated circuits packages. Then TDR is use to solve signal integrity problems in printed circuit boards (PCBs). A novel RF characterization approach, time domain gating (TDG) is also presented. Digital signal processing (DSP) permits convenient implementation of the Fast Fourier Transform (FFT) known as the chirp Z Transform in modern vector network analyzers. Thus, S-parameters parasitic elements are removed after applying the best adapted time domain gate to raw data and converting back to frequency domain. Finally, the last part of this thesis deals with RF characterization with the aim to extract RF models of passive devices. This study shows that test structures have a great impact on the measurements of an intrinsic device under test (DUT) even after de-embedding, so that to match test structures and improve their optimization, prior electromagnetic simulations are necessary. The measurements are in good agreement with simulations
Bary, Laurent. "Caractérisation et modélisation du bruit basse fréquence de composants bipolaires micro-ondes : application à la conception d'oscillateurs à faible bruit de phase". Toulouse 3, 2001. http://www.theses.fr/2001TOU30204.
Texto completo da fonteThouvenin, Nicolas. "Études des potentialités des composants à base de nitrure de gallium pour des applications mélangeurs à large bande de fréquence". Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10105/document.
Texto completo da fonteTelecommunication systems require wider and higher frequency bands. The basic function of these systems is the frequency transposition and so improved mixer performance is a criterion constantly sought. For this, the use of new emerging and promising technologies is considered. Related to their performance in terms of frequency and power GaN transistors generate interest for mixing applications. The first part of this work establishes the potential of the GaN sector for microwave applications. The various features and architectures are described focusing on optimal topologies for mixers based FETs transistors used thereafter. Then, this work presents the study of non linear electrical modeling of HEMT transistor. The modeling technique is first presented and then illustrated using GaN and GaAs components. After comparing measurements/simulations, modeling is validated using large-signal measurements. The final section presents the externals elements to the transistors required for circuit design of mixer. Using the mixer characterization techniques developed during this Phd, all prototypes mixers "cold" and "hot" based on GaN and GaAs transistors have been measured in order to highlight the potential of GaN mixers for different architectures compare to the same topologies based on GaAs transistor
Foulonneau, Bertrand. "Mise au point d'un laboratoire de mesure de l'indice d'affaiblissement électromagnétique en champ diffus de composants du bâtiment". Limoges, 1996. http://www.theses.fr/1996LIMO0019.
Texto completo da fonteSalzenstein, Patrice. "Technologie des composants à hétérostructures pour les têtes de réception par satellite aux longueurs d'ondes millimétriques". Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 1996. http://tel.archives-ouvertes.fr/tel-00077055.
Texto completo da fontePour les dispositifs actifs, le composant développé est une hétérostructure à simple barrière qui présente des non-linéarités en capacité extrêmement marquées utilisables dans les multiplicateurs de fréquences. Par rapport aux dispositifs Schottky varactors conventionnels, les hétérostructures permettent de tirer parti de propriétés de symétrie et d'optimiser et d'optimiser au mieux les caractéristiques des courants de déplacement et de conduction. En pratique, les composants sont fabriqués à partir de multiples hétérostructures épitaxiées par jets moléculaires sur substrat InP mettant en jeu des techniques d'intégration monolithiques. Plusieurs séries d'échantillons ont été fabriquées avec pour les dernières structures des résultats à l'état de l'art, notamment avec la possibilité de moduler la capacité dans un rapport 5 en tenue en tension de plus de 6 Volt favorable aux applications de puissance. dans cette optique, nous démontrons par ailleurs la possibilité d'intégrer verticalement plusieurs composants sur une même épitaxie.
Pour les structures passives, elles sont constituées de lignes coplanaires déposées sur membrane de polyimide ou de nitrure de silicium. Dans ces conditions le milieu de propagation peut se comparer à l'air avec une permittivité effective très proche de celle obtenue dans l'espace libre. De telles structures ont été fabriquées en utilisant des technologies de micro-usinage de l'Arséniure de Gallium. Les résultats des caractérisations hyperfréquences sont conformes aux prédictions théoriques, avec la propagation faible perte de l'énergie électromagnétique sans dispersion dans une très large bande de fréquence. Ces études sont ensuite étendues à la conception de structures de filtrage aux fréquences millimétriques, notamment à 250 GHz.
Bouyge, David. "Systèmes lasers impulsionnels compacts et dispositifs hyperfréquences accordables basés sur l'intégration de composants MEMS". Limoges, 2007. https://aurore.unilim.fr/theses/nxfile/default/ac1d8e2a-01a5-4522-a2a7-f571790878dc/blobholder:0/2007LIMO4054.pdf.
Texto completo da fonteIn spite of the large interest provoked by the integration of Micro-Opto-Electro-Mechanical-System (MOEMS) in optic systems, not enough experimentation concerning their capacity to produce short optic impulsions is developed. It is therefore in this direction that we orientated our jobs. First, this manuscript raises the state of art on MOEMS micro-mirrors and then introduces various kinds of pulsed laser systems regimes. The development of MOEMS is displayed across stages of conception, optimization of technology and characterization. We demonstrate a simple technique to produce active Q-switching in various types of fiber amplifiers by active integration MOEMS. We present the realization of a multiwavelength laser system which exploits the achromaticity of micro-mirrors for the generation of tunable radiations in the visible spectre. Finally, we study the development of tunable multipole reject band filters
Coupat, Jean-Marc. "Synthèse expérimentale d'impédances par la technique de la charge active : application à la conception d'un système de caractérisation de composants microondes de puissance fortement désadaptés". Limoges, 1994. http://www.theses.fr/1994LIMO0026.
Texto completo da fonteGribaldo, Sébastien. "Modélisation non-linéaire et en bruit de composants micro-ondes pour applications à faible bruit de phase". Phd thesis, Université Paul Sabatier - Toulouse III, 2008. http://tel.archives-ouvertes.fr/tel-00339514.
Texto completo da fonteHidalgo, Hervé. "Dépôt chimique en phase vapeur de couches minces d'alumine dans une post-décharge micro-onde". Limoges, 2003. http://aurore.unilim.fr/theses/nxfile/default/5bf66218-3817-4018-89e7-b6e3ca4d72a0/blobholder:0/2003LIMO0056.pdf.
Texto completo da fonteAlumina thin films were deposited on silicon substrate by chemical vapor deposition using an organometallic precursor (trimethylaluminium) introduced in the afterglow of oxygen microwave plasma. Columnar and oxygen over-stoichiometric films presented hydrogen content between 4 and 25 at. % which stabilized gamma alumina at the nanometric scale. An amorphous interphase (5 nm-thick) was detected at the substrate/coating interface. Parametrical study pointed out that lower pressure, higher substrate-holder RF bias and elevated substrate temperature improved the film quality. Correlations between the gas phase composition in radiative species and films properties were complex. Statistical tools were used in order to optimize the process. The influence of the most significant parameters (pressure, RF bias, temperature, substrate/injector distance) on the film properties was studied by mean of a response surface design of experiments. Finally, principal component analyses were conducted to identify quality markers in the gaseous phase
Chang, Christophe. "Amélioration de modèles électroniques de composants de puissance de type TBH ou pHEMT et application à la conception optimale de modules actifs pour les radars". Limoges, 2004. http://aurore.unilim.fr/theses/nxfile/default/5fec2f46-031b-4a93-a973-c549d321946d/blobholder:0/2004LIMO0014.pdf.
Texto completo da fonteThe aim of this work is the development of an operational tool integrating an electrothermal model in a circuit simulation environment. In order to make it available in an industrial context, this tool is based on two commercial simulators : a 3D thermal simulator (ANSYS) and a circuit simulator (ADS provided by Agilent). The first step of the method consists in the generation of a precise thermal component model described in the finite element simulator. Then a reduction process developed by the IRCOM (Institut de Recherches en Communications Optiques et Microondes, France) and associated with the ANSYS reduction technique, are used to obtain a reduced thermal model compatible with circuit simulators such as ADS. Finally, this model coupled with a non-linear electrical model, allows designers to deal with precise electrothermal simulations of high power circuits or actives modules. Moreover, the thermal model can take into account the non-linear behavior of the thermal conductivity of the component's materials and can be applied for steady state or transient analyses
Chainon, Sébastien. "Etude et conception d'antennes composées de guides d'ondes en technologie mousse métallisée. Application aux antennes à balayage électronique". Rennes 1, 2002. http://www.theses.fr/2002REN10100.
Texto completo da fontePace, Loris. "Caractérisation et modélisation de composants GaN pour la conception de convertisseurs statiques haute fréquence". Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1I078.
Texto completo da fonteThe high frequency operation of GaN power transistors is of great interest in order to reduce size, weight and volume of power converters. Indeed, GaN HEMT power transistors show very good physical properties for the development of high frequency power converters. Within the constant rise of the amount of power electronics in electrical systems, the GaN technology, associated with the Silicon Carbide (SiC) one, aims to progressively replace the Silicium (Si) power devices especially in terms of robustness in harsh conditions and of power integration. The optimal design of high frequency power converters involves an accurate knowledge of power devices operations in the systems. Therefore, before the fabrication of converters, simulations steps based on semi-conductor and surrounding elements models are required. This research work focuses on the development of a modeling methodology of packaged GaN power transistors, exclusively based on non-intrusive characterization techniques. In this work, electrical characterization techniques used for radiofrequency transistors modeling, such as S-parameters and pulsed current/voltage measurements, are adapted to characterize the packaged GaN power transistor. Based on the characterization results, linear and nonlinear elements of the transistor’s electrical equivalent circuit are determined and a complet electrical model of the device is implemented in the ADS software. A Double Pulse test bench is made in order to apply the developed electrical model. After having modeled the whole test bench, including the printed circuit board, simulation results of the switching waveforms are compared to experimental results. Considering the effects of transistor’s temperature on its operation in power converters, a methodology is proposed to extract the thermal model of the device using dissipated power measurements and an optimization procedure. The obtained thermal circuit and its influence of thermal-dependent elements are added to the previous electrical model in order to build the complete electro-thermal model of the GaN power transistor. Based on the developed model, a DC to DC converter using the studied transistor has been designed and fabricated. Then, the simulation results are compared to experimental results for several operating temperatures and a prediction of the continuous operation of the converter is achieved
Chehade, Habib. "Modélisation des composants microélectroniques non linéaires par séries de Volterra à noyaux dynamiques, pour la CAO des circuits RF et micro-ondes". Limoges, 1998. http://www.theses.fr/1998LIMO0041.
Texto completo da fonteDelage, Thierry. "Optimisation du dépôt de films minces de BSTO et de tricouches YBCO/BSTO/YBCO : phénomènes de croissance et d'interfaces, application à la réalisation de composants hyperfréquences accordables". Limoges, 2003. http://aurore.unilim.fr/theses/nxfile/default/d1de461a-c852-41f8-9b5d-b50f1be423d1/blobholder:0/2003LIMO0048.pdf.
Texto completo da fonteThis work deals with the study of thin BaxSr1-xTiO3 (BSTO), bilayers BSTO/Y1Ba2Cu307-d (YBCO) and trilayers YBCO/BSTO/YBCO films deposited by pulsed laser deposition (PLD) on MgO single crystal substrate. It's divided in four principal parts. The first chapter recalls the essential concepts about capacitors and ferroelectric materials. The second chapter describes experimental devices and processes concerning massive target realization, layers elaboration and characterizations are particularly performed by in situ RHEED system. In the third chapter, the crystallographic and the dielectric properties of the BSTO thin film deposited on MgO single crystal are correlated with deposition parameters (temperature, oxygen pressure, thickness). As example, the control of stress at film/substrate interface leads to 900 nm mono-oriented (00l) BSTO layers with dielectric constant of about 2000 at 12. 5 GHz. In the last chapter, we present the insertion of BSTO thin films in radiofrequency microsystems (Multilayers with two BSTO compositions x = 0. 67 and x = 0. 1). YBCO/BSTO/YBCO trilayers are realized in order to work at liquid nitrogen temperature (77 K). Finally, amorphous BSTO and alumina thin films are used in microwave devices (MEMS MicroElectroMechanical System)
Haidar, Jihad. "Commande optoélectronique d'atténuateurs, de résonateurs et de filtres microondes réalises sur substrat silicium". Grenoble INPG, 1996. http://www.theses.fr/1996INPG0094.
Texto completo da fonteChtioui, Mourad. "Photodiodes UTC de puissance pour les liaisons optiques/hyperfréquences et la sommation de signaux hyperfréquences par voie optique". Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10129.
Texto completo da fonteThis work focuses on the design and fabrication of GaInAs/InP Uni-Traveling-Carrier (UTC) Photodiodes (PDs) for high optical power detection up to 20 GHz. The selected solution consists of a back-side ilIuminated PD compatible with flip-chip mounting on microwave transmission lines. The first section of this study is dedicated to the optimisation of both bandwidth and responsivity, simultaneously. It demonstrates how important the design of absorption and collection layers is. ln particular, the introduction of a static electric field in the absorption layer, owing to a graduaI doping, is essential to achieve, simultaneously, a high responsivity (0.8 A/W at 1.55 µm) and a large bandwidth (= 20 GHz under high photocurrent). Secondly, the saturation mechanisms in a UTC structure are analysed. Reducing the junction bias variation, mitigating the space charge effects and enhancing the heat power dissipation are demonstrated to be the main axes for design optimization under high power. Therefore, a new design of a non-uniformly doped collector is proposed. It reduces saturation limitations and leads to state-of-the-art saturation current =100 mA at 20 GHz. FinaIly, a theoretical and experimental study of high power UTC-PDs linearity is presented. The developed PDs show a high linearity and achieve third order intercept points (IP3) op to 35 dBm at 20 GHz, which makes them good candidates for analog photonic links that need a high dynamic range
Assadi-Haghi, Atousa. "Contribution au développement de méthodes d'optimisation structurelle pour la conception assistée par ordinateur de composants et de circuits hyperfréquences". Limoges, 2007. https://aurore.unilim.fr/theses/nxfile/default/1a189347-19d7-4422-99d6-9019a30e6b99/blobholder:0/2007LIMO4050.pdf.
Texto completo da fonteThe thesis manuscript reports on the study of structural optimization methods for computer aided design of microwave devices. In the first part, a geometrical optimization approach is developed and applied to the design of a packaged circuit. The approach is based on model order reduction using segmentation and geometrical parameterization of the electromagnetic model. The reduced model is optimized through a gradient method, minimizing a cost function dedicated to identification of parasitic modes in the package. In the second part, a topological optimization approach, based on topology gradient evaluation, is applied for optimizing metal distribution upon the surface of a microstrip component. For solving local optimum problems, the method is hybridized with a genetic algorithm for exploring more largely the optimization domain, improving the convergence by this way
Delcourt, Sébastien. "Caractérisation de composants et dispositifs actifs en basse température en bande Ka et Q : applications à la filière métamorphique". Lille 1, 2007. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2007/50376-2007-217.pdf.
Texto completo da fonteThis thesis is related on the noise characterisation of active devices at low temperatures (until 78K) in the Ka Band (26-40 GHz) and in the Q band (33-50 GHz). An original electro-thermal model has been developed to extract very precisely at low temperatures (until 78K) the noise figure of cooled components. This method has been associated to an amelioration of the estimation of the noise parameters due to the "F50" model, using two noise temperatures Tin, Tout, taking into account the source inductor of the transistors. , which has a great influence in these frequency bands. These methods have been applied mainly to a new kind of transistors, the metamorphics transistors MHEMTs. The improvement of the noise behaviour of cooled transistors is accompanied to a reduction of the consumption, interesting for cooled embedded applications. A low noise amplifier has been designed by the CNES, using this kind of transistors, and exhibiting state of the art performance, with a noise figure of 1. 1 dB and an associated gain of 28 dB at 30 GHz. At low temperatures, this device designed to work at room temperature, was still working very well at 78K, with a very low noise behaviour. So, we have observed all the potentiality of the metamorphic process for cooled embedded low noise applications, for frequencies up to 50 GHz
Chtioui, Mourad. "Photodiodes UTC de puissance pour les liaisons optiques/hyperfréquences et la sommation de signaux hyperfréquences par voie optique". Electronic Thesis or Diss., Lille 1, 2008. http://www.theses.fr/2008LIL10129.
Texto completo da fonteThis work focuses on the design and fabrication of GaInAs/InP Uni-Traveling-Carrier (UTC) Photodiodes (PDs) for high optical power detection up to 20 GHz. The selected solution consists of a back-side ilIuminated PD compatible with flip-chip mounting on microwave transmission lines. The first section of this study is dedicated to the optimisation of both bandwidth and responsivity, simultaneously. It demonstrates how important the design of absorption and collection layers is. ln particular, the introduction of a static electric field in the absorption layer, owing to a graduaI doping, is essential to achieve, simultaneously, a high responsivity (0.8 A/W at 1.55 µm) and a large bandwidth (= 20 GHz under high photocurrent). Secondly, the saturation mechanisms in a UTC structure are analysed. Reducing the junction bias variation, mitigating the space charge effects and enhancing the heat power dissipation are demonstrated to be the main axes for design optimization under high power. Therefore, a new design of a non-uniformly doped collector is proposed. It reduces saturation limitations and leads to state-of-the-art saturation current =100 mA at 20 GHz. FinaIly, a theoretical and experimental study of high power UTC-PDs linearity is presented. The developed PDs show a high linearity and achieve third order intercept points (IP3) op to 35 dBm at 20 GHz, which makes them good candidates for analog photonic links that need a high dynamic range
Reynoso-Hernandez, J. Apolinar. "Bruit de fond, phénomènes de relaxation électrique et fiabilité de composants actifs pour micro-ondes (diodes Schottky, MESFET et HEMT)". Toulouse 3, 1989. http://www.theses.fr/1989TOU30185.
Texto completo da fonteSouza, Antonio Augusto Lisboa de. "Caractérisation expérimentale et modélisation cyclostationnaire des sources de bruit BF dans les composants semiconducteurs pour la CAO des circuits MMIC non linéaires". Limoges, 2008. https://aurore.unilim.fr/theses/nxfile/default/9ddf2d2c-ad77-4b15-a03d-f8faff7acc06/blobholder:0/2008LIMO4014.pdf.
Texto completo da fonteThis work concerns the development of an experimental technique to characterize the low-frequency noise of semiconductor devices. In order to extract the equivalent short-circuit current noise sources of a transistor operated under high DC current densities, we propose a method based on the experimental determination of the low-frequency dynamics of the device, followed by the measurement of the voltage fluctuations across its terminals. We also studied the behavior of the low-frequency noise of diodes and transistors, when those devices are forced into large-signal operation. The instrumentation retained for this study had been previously used to measure the 1/f noise of carbon resistors, as a mean of exploring the potentialities of the setup. The results obtained from resistors, diodes and transistos give a strong evidence of the clyclostationary properties of the low-frequency noise
Michel, Nicolas. "Étude et réalisation de photodiodes-guides millimétriques de puissance à 1,5 micron". Lille 1, 2004. http://www.theses.fr/2004LIL10008.
Texto completo da fonteDes photodiodes dont la bande passante atteint 50 GHz et dont la réponse vaut 0,6 A/W ont été fabriquées grâce au procédé CAIBE (Chemically Assisted Ion Beam Etching) spécialement étudié et optimisé. On souhaite maximiser le photocourant délivré par les photodétecteurs autour de 40 GHz dans la deuxième partie de cette thèse. Les photodiodes capables de délivrer un fort photocourant permettent par exemple de remplacer les amplificateurs hyperfréquences par des amplificateurs optiques en amont des récepteurs numériques. Les photodiodes à absorption diluée développées dans le cadre de cette thèse utilisent une mince zone absorbante, qui permet une atténuatI͏̈on très progressive du rayonnement. Les photodiodes à couplage évanescent développées en collaboration avec l'IEMN (Institut d'Electronique et de Microélectronique du Nord) comportent un guide d'entrée passif depuis lequel le rayonnement remonte vers la zone active. Elles. Fonctionnent linéairement sous un photocourant de plus de 14mA à 40 GHz
Capelle, Marie. "Intégration monolithique de composants bipolaires et de circuits radiofréquences sur substrats mixtes silicium/silicium poreux". Thesis, Tours, 2013. http://www.theses.fr/2013TOUR4028/document.
Texto completo da fonteThe rapid growth of wireless systems involves the development of highly efficient, large-scale, low-cost and radio frequency (RF) systems. Monolithic integration of RF circuits on silicon can enhance the appeal of this technology further. However, in order to fully realize the next generation of system-on-chip on silicon, the losses which results in to degradation in the performances of passive components need to be addressed. This work investigates locally insulating porous silicon regions on silicon substrates, targeting highly efficient passive components. This thesis begins with a detailed description of porous silicon/silicon hybrid substrate fabrication using a novel mask. The influence of the hybrid substrate on fabricated passive device performances was studied and the results were compared to similar devices on conventional silicon substrates. Finally, monolithic integration of passive and active devices was demonstrated on 6” hybrid substrates, with performance improvements when compared with standard silicon. This work has also shown that hybrid substrates can be fully integrated into industrial scale microelectronic processes
Minko, Auxence. "Technologie des composants de type HEMTs AlGaN/GaN sur substrat silicium pour des applications en amplification de puissance et faible bruit". Lille 1, 2004. http://www.theses.fr/2004LIL10109.
Texto completo da fonteCamperi-Ginestet, Christophe. "Optimisation de l'intégration des composants optoélectroniques en films minces séparés du substrat de croissance par la technique du lift-off". Toulouse, INSA, 1993. http://www.theses.fr/1993ISAT0036.
Texto completo da fonteChabbert, Christophe. "Etude de la dégradation des paramètres de bruit de composants soumis à des surcharges micro-ondes : réalisation d'un banc de caractérisation automatique". Toulouse, ENSAE, 1997. http://www.theses.fr/1997ESAE0009.
Texto completo da fonteKabouche, Riad. "Caractérisations de composants et Conceptions de circuits à base d’une filière émergente AlN/GaN pour applications de puissance en gamme d’ondes millimétriques". Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10200/document.
Texto completo da fonteGallium Nitride (GaN) technology is now the ideal candidate for high power applications in the millimeter wave range. The characteristics of this material enable high voltage operation at high frequency, as illustrated by its breakdown field and high electron saturation velocity. This research work has initially allowed the development of a test bench capable of "Large Signal" characterization, called LoadPull up to Q band, in continuous-wave and pulsed mode of this emerging technology. Indeed, the high power density generated by the GaN technology has made the development of this bench unavoidable and relatively unique. In addition, this study has focused on the characterization of several innovative types of devices that have demonstrated state-of-the-art performance, with a power added efficiency (PAE) above 46% associated to a power density of 4.5 W/mm obtained for an operating frequency of 40 GHz in continuous-wave. Finally, this work aimed the design and fabrication of two power amplifiers on silicon substrate (based on the industrial OMMIC technology) in the Ka-band, showing the possibility of achieving MMIC type circuits from advanced GaN transistors technology. These two amplifiers were designed for specific purposes: combining high power and high PAE performance and pushing bandwidth limits