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Cesaro, Umberto. "Advanced instrumentation for smart monitoring and automatic diagnostics in industrial and health applications". Electronic Thesis or Diss., Amiens, 2020. http://www.theses.fr/2020AMIE0040.
Pełny tekst źródłaIn this thesis, the feasibility of a method to measure the quantity of drug administered transdermally by impedance spectroscopy is demonstrated. The thesis proves the relevance of the impedance measurement to assess the quantity of drug penetrated into the skin after transdermal administration. In particular, the measured quantity of drug depends linearly on the variation in amplitude of impedance normalized to the pretreated value. In this thesis, the feasibility of a method to measure the quantity of drug administered transdermally by impedance spectroscopy is demonstrated.This thesis is made up of several parts, briefly described below. The first chapter presents an overview of electrical impedance spectroscopy and its applications. The second chapter talks about transdermal administration. This chapter also shows the feasibility of a method to measure the amount of drug transported transdermally. Next, the Drug Under Skin Meter (DUSM), a general purpose bioimpedance device capable of determining the amount of drug transmitted transdermally, is proposed. In the thesis, the concept and physical design of the instrument, as well as details on its production and operation, are illustrated. In addition, the experimental results obtained are illustrated The results indicate that the quantity of drug delivered can be evaluated by reasonable metrological performance by a single measurement of the amplitude of the impedance at a single frequency. The prototyped device has been shown to be able to identify the amount of drug (ml) delivered to a test tissue, by measuring the impedance spectrum before and after administration. The volume of drug (ml) transported through the skin is evaluated by locally measuring the bioimpedance before and after childbirth. In therapeutic applications, the instrument can provide an inexpensive and clinically portable solution. Then, the metrological characterization, using the injection as reference subcutaneous transfer of a known volume of drug, is reported, in laboratory, in vitro on eggplants and ex vivo, on ear pigs. The results of resolution, short-term stability, interindividual tissue reproducibility, sensitivity, repeatability and linearity indicate remarkable scenarios of clinical applications for such a bioimpedance device. Chapter three shows how the DUSM could also be used to monitor insulin absorption: a transducer on a chip, to monitor insulin that is actually bio-available after administration in clinical diabetology, is proposed. Bioavailability after administration is assessed by monitoring the amount of insulin under the skin using a bioimpedance measurement. An individual model, specific to each person during each insulin injection is identified, characterized and validated, to manage the individual inter and intra differences. Ideas of concept, architecture and operation of the transducer, as well as details on its prototype, are illustrated. Then, metrological characterization and validation are reported in the laboratory, as well as in vitro on eggplants, using injection as a reference subcutaneous transfer of a known volume of insulin. The results of significant intra-individual reproducibility in vitro on eggplants indicate significant scenarios for assessing the bioavailability of insulin in clinical diabetology. As an important branch of this research, the possibility of studying failure conditions in industrial plants was explored in Chapter 4. Finally two collateral works developed during this study period are presented
Polonovski, Jean-Pierre. "Conversion numérique analogique à faible coût". Paris 11, 1985. http://www.theses.fr/1985PA112378.
Pełny tekst źródłaTwo D/A conversion techniques are discussed. The first one consists on averaging a digital signal of a given duty cycle. The second one uses two equal switched capacitors
Dehaese, Nicolas. "Etude et simulation d'un système sur puce radiofréquence pour les applications faible coût et faible consommation". Aix-Marseille 1, 2005. http://www.theses.fr/2005AIX11066.
Pełny tekst źródłaCamus, Manuel. "Architecture de réception RF très faible coût et très faible puissance : application aux réseaux de capteurs et au standard ZigBee". Phd thesis, Université Paul Sabatier - Toulouse III, 2008. http://tel.archives-ouvertes.fr/tel-00309926.
Pełny tekst źródłaDruga, Mirela. "Méthodologie de conception d’aérogénérateurs optimaux, à faible coût, à destination des sites isolés". Le Havre, 2011. http://www.theses.fr/2011LEHA0021.
Pełny tekst źródłaThe strong increase of the small wind turbine production requires the review of the existing technologies to suit the expanding need. This thesis develops a design and optimal sizing methodology of stand alone wind systems. The statistical profile of wind resource, the expected consumption and the specification targets are taken into account. Our choice of generator is based on PMSM, in order to maximize the efficiency of the wind energy conversion within economically viable topologies. This study highlights different possible scenarios to drive the system and predicts how to take into account the system control. The simulation using a recorded wind data allowed the validation of our models in real situations. Our software approach advantages are modularity and adaptability. By choosing the relevant settings for each system element and using our results as database, a multi-criteria constrained optimization method can be applied. Therefore a library of models depending on the site and its energy demand could be built in order to expand our approach. The developed code has the ability to generate optimal sizing, where the cost per kWh is taken into account, which is a critical point for manufacturers and users
David-Grignot, Stéphane. "Mesure de bruit de phase faible coût à l'aide de ressources de test numériques". Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS055/document.
Pełny tekst źródłaIn recent decades, the microelectronics industry has experienced a wide democratization of the use of telecommunication applications. The improved process design and manufacturing have produced complex and high performance analog, mixed and radio frequency circuits for these applications. However, the test cost of these integrated circuits still represents a large part of the manufacturing cost. Indeed, very often, analog testing is not just a functional test but needs measurements for specification validations. These measurements require the use of dedicated instruments expensive resources on standard industrial test equipment.One of the essential but costly specifications to validate in RF circuitry is the phase noise level. The currently used industrial technique consists in capturing the signal from the circuit under test using an RF tester channel equipped with a high performance analog to digital converter; a Fourier transform is then applied to the digitized signal and the phase noise is measured on the resulting spectrum.The approach proposed in this thesis is to achieve the phase noise measurement using solely digital low-cost resources. The basic idea is to perform 1-bit capture of the analog signal with a standard digital channel and develop post-processing algorithms dedicated for phase noise evaluation from the zero-crossings of the signal.Two methods are presented. The first method is based on an estimate of the instantaneous signal frequency and an analysis of their dispersion induced by phase noise. This method imposes a strong constraint on the sampling frequency to be used and proved to be sensitive to noise amplitude, limiting the range of possible measures. A second method is then proposed to overcome these limitations. From the binary capture of the analog signal, a reconstruction of the instantaneous phase of the signal is carried out, then filtered and characterized by a common tool of frequency stability assessment: the Allan variance. This technique, robust to amplitude noise and jitter, can be parametrized and enables efficient characterization of phase noise without fundamental constraint.In addition to the simulations, these techniques are subject to a stochastic study and are validated experimentally on different types of signals to be measured - artificially generated or from chips on the market - and with different measuring instruments - on oscilloscope or industrial tester, in laboratory and on a production line-. An On-chip implementation is also proposed and validated with a FPGA prototype
Troubat, Nicolas. "Régulation autonome du myocarde et activité métabolique lors de tâches à faible coût énergétique". Poitiers, 2009. http://www.theses.fr/2009POIT2295.
Pełny tekst źródłaThe main purpose of this work was to assess the impact of the low cost energy activities (physical and cognitive tasks) on energy metabolism through indirect calorimetry and of automatic regulation of the myocardium through measures of heart rate variability measures. The objective of the first study was to assess the effects of a psychological stress on the physiological responses. The result suggested a stimulation of the sympathetic nervous system with an unchanged of the parasympathetic system activity. Changes recorded in terms of energy substrate and sympathetic nervous system activity appeared to be due to the strong cognitive requirements of the proposed situation. Our second study was intended to test the effects of cold and a cognitive work on the physiological responses during a repetitive work. The results suggested that the combination of cold and cognitive task is responsible for strong cardio-respiratory, energy and muscle adaptations. Low energy cost activities (physical and cognitive tasks) resulted in significant variations of physiological functions which are closed from chronic stress. This project has opened new perspectives of research on the understanding of physiological phenomena governing cognitive activities and human adaptation to the multiplication of stress factors
Gaubert, Jean. "Contribution à l'étude d'interfaces analogiques hautes fréquences pour objets communicants à faible coût de fabrication". Habilitation à diriger des recherches, Université de Provence - Aix-Marseille I, 2007. http://tel.archives-ouvertes.fr/tel-00796512.
Pełny tekst źródłaDurand, Sylvain. "Commande faible coût pour une réduction de la consommation d'énergie dans les systèmes électroniques embarqués". Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00586620.
Pełny tekst źródłaAlrammouz, Rouba. "Conception et réalisation d’un système de détection de gaz à faible coût sur substrat flexible". Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTS134.
Pełny tekst źródłaCurrent concerns for environmental protection and public health focus on air quality in industries, cities and households. Nowadays, paper-based gas sensors are of increasing interest due to their low cost, biodegradability, flexibility and applications in e-textiles, e-dressings and e-packaging.Graphene oxide is a derivative of graphene with exceptional electrical, mechanical and thermal properties. Graphène oxide is a promising material for the development of low-cost room temperature gas sensors.In this context, this thesis aims to integrate a graphene oxide sensing layer inside a porous paper substrate for humidity and ammonia detection. The first part of this work focuses on the fabrication, functionalization and optimization of capacitive porous gas sensors on paper. A new local reduction process of graphene oxide into electrodes is introduced. The process is hot-plating, a low cost technique compatible with large scale productionThe second part of this work studies the humidity and ammonia sensing capabilities of the sensors. Graphene oxide on paper exhibits a high sensitivity towards ammonia, with humidity as an interfering gas. The local reduction of graphène oxide into electrodes, and its functionalization with zinc oxide increased the sensitivity and selectivity of the device towards humidity. The fabricated sensors exhibit a good repeatability, reproducibility and flexibility
Perrot, Serge. "Étude théorique et expérimentale de la technologie membrane pour applications "faible coût" aux longueurs d'ondes millimétriques". Brest, 2001. http://www.theses.fr/2001BRES2037.
Pełny tekst źródłaParment, Frédéric. "Guides d’onde Intégrés au Substrat (SIW) multicouches à haute performance pour des circuits millimétriques à faible coût". Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT077/document.
Pełny tekst źródłaThe substrate integrated waveguide (SIW) technology, introduced in the early 2000s, has presently trigged a huge interest from academia to industry with the focus on the design and development of low-loss, compact, integrated, self-packaged and low-cost microwave and millimeter-wave circuits, antennas and systems. However, the classical metallic waveguide technology, which offers better performances such as lower insertion loss and higher power handling, has still been used in the design of microwave and millimeter-wave systems, despite its higher cost and bulky structure. To offer a highly integrated, further loss-reduced, low-cost alternative to the conventional waveguide and also to allow a wide-spread use of the millimeter-wave spectrum, this thesis research introduces a new SIW structure called Air-Filled SIW (AFSIW). This new structure has been theoretically and experimentally studied in details with a substantial amount of results. At millimeter wave frequencies, compared to the SIW topologies, the proposed AFSIW scheme exhibits a substantially lower insertion loss (three times, for example) and a much higher average power handling capability (four times, for example). Numerous AFSIW passive components have been investigated designed and demonstrated, which take advantages of the well-established multilayer printed circuit board (PCB) fabrication process. Couplers, phase shifters, power dividers, antennas and filters have been modeled, designed, prototyped and measured based on the introduced technology. Their performances have theoretically and experimentally been compared with their SIW counterparts to demonstrate and validate the benefits of the proposed technology
Nguyen, Van Hoan. "Conditions d’utilisation d’un «cuiseur-extrudeur à très faible coût» pour la production de farines infantiles au Vietnam". Montpellier 2, 2008. http://www.theses.fr/2008MON20214.
Pełny tekst źródłaThe main objectives of the thesis were to complete the knowledge required for having a sufficient mastery of use and for transferring abroad the “Very-low-cost extruder” (VLCE) designed in Vietnam for the production of infant flours from locally available raw materials and to compare intakes of 6-10 month old children consuming flours prepared with or without using the VLCE. The effects of the variation of some extrusion conditions (starch, lipid and water contents of blends before extrusion; nature of starchy raw materials; length and erosion of the screw and barrel) on extrusion behavior (temperature, pressure) and some characteristics of extrudates (expansion, water absorption, water solubility, lipid loss and gelatinization rate) and on apparent viscosity of gruels prepared from extruded flour, used for the calculation of an instant index, were studied. This work allowed us to determine the processing conditions to obtain either instant flour or ready-to-cook flour. The fortified gruels from instant flour prepared from rice, soybean, sesame, sugar and vitamin-mineral premix or the ready-to-cook flour with the same composition (+ amylase) have appropriate consistency and energy density. Despite lower gruel intakes, the high energy density (ED) of the gruels prepared from extruded instant flour or ready-to-cook flour allowed an increase in energy intakes of 37% and 65%, respectively, in comparison with low ED gruels prepared from raw flour. In addition, when consumed twice a day with the opportunity to also eat their usual foods, ED gruels prepared from the instant flour resulted in a 58% increase of energy intakes from all complementary foods in comparison with energy intakes of infants consuming only usual complementary foods
Vayssade, Thibault. "Une approche digitale pour le test faible coût de circuits intégrés RF : application à un transceiver ZigBee". Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTS065.
Pełny tekst źródłaThis thesis focuses on the reduction of testing costs for RF integrated circuits. The original approach that is investigated relies on the use of a standard digital ATE to perform an under-sampled acquisition of the RF signal to be analyzed. The basic idea is to use the comparator present in a digital tester channel to convert the RF signal into a binary sequence. During this conversion, the information carried by the RF signal (amplitude, frequency, phase ...) is transformed into a timing information contained in the binary vector captured by the ATE. The objective is then to develop dedicated processing algorithms able to retrieve the essential RF signal characteristics from the analysis of the binary vector. The major benefit of this solution is that it eliminates the need of expensive RF test resources traditionally required. In addition, since digital channels are generally available in large numbers on a standard ATE, this approach also provides the ability to implement multi-site tests to further reduce testing costs. In this thesis, the proposed approach is implemented for ZigBee Transceiver from NXP Semiconductors operating at 2.4 GHz and intended for the growing market of Internet of Things (IoT). The under-sampling conditions allowing to preserve the information contained in the RF signal while respecting the test equipment constraints are defined and dedicated algorithms are developed to implement the various tests specified by IEEE Std 802.15.4 ™ (power test, spectral mask test, EVM measurements). The proposed solution is first evaluated in simulation within the Matlab environment. A laboratory test bench is then developed to carry out an initial validation. Finally, measurements performed with an ATE on several hundreds of circuits in an industrial environment fully validate the proposed solution
Kara, Messaoud. "Réseau de capteurs sans fil : étude en vue de la réalisation d'un récepteur GPS différentiel à faible coût". Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2009. http://tel.archives-ouvertes.fr/tel-00724810.
Pełny tekst źródłaCarbonneau, Yves. "Développement et mise au point de nouveaux alliages de magnésium à propriétés mécaniques élevées et à faible coût". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq25521.pdf.
Pełny tekst źródłaHrigua, Slim. "Contribution à l'élaboration de modèles précis et à faible coût de calcul pour l'électronique de puissance et la CEM". Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2014. http://tel.archives-ouvertes.fr/tel-01022198.
Pełny tekst źródłaMakassikis, Constantinos. "Conception d'un modèle et de frameworks de distribution d'applications sur grappes de PCs avec tolérance aux pannes à faible coût". Phd thesis, Université Henri Poincaré - Nancy I, 2011. http://tel.archives-ouvertes.fr/tel-00591083.
Pełny tekst źródłaCheynet, De Beaupré Vincent. "Dispositifs à Faible Coût Appliqués à la Synthèse de Fréquences et à la Modulation FSK pour les Systèmes de Radiocommunication". Phd thesis, Université de Provence - Aix-Marseille I, 2008. http://tel.archives-ouvertes.fr/tel-00395267.
Pełny tekst źródłaTous les systèmes de communication modernes requièrent un signal périodique stable pour fournir une base de temps nécessaire à la synchronisation, à l'alignement des horloges d'échantillonnage, à la récupération d'horloge ou encore à la synthèse de fréquence. Le verrouillage de phase est une des principales techniques pour répondre à ces besoins.
L'enjeu de ce travail de thèse est de concevoir, réaliser et caractériser une boucle à verrouillage de phase capable de s'intégrer dans un système de télécommunication développé en partenariat entre la société STMicroelectronics et l'Institut Matériaux Microélectronique Nanosciences de Provence (IM2NP). Ce système faible coût, faible consommation, réalisé en technologie CMOS est destiné à des applications de type réseaux personnels sans fils. Des contraintes fortes en terme de surface silicium, consommation, réactivité de la boucle et de précision fréquentielle sont les éléments directeurs de la conception de cette PLL. La boucle réalisée devra être capable de fonctionner en synthétiseur de fréquence et en modulateur FSK. Une attention particulière sera portée à l'oscillateur contrôlé en tension, véritable coeur de la PLL proposée.
Fouque, Andrée. "Contribution à la conception d'un récepteur mobile failble coût et faible consommation dans la bande Ku pour le standard DVB-S". Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14528/document.
Pełny tekst źródłaThis work focuses on the faisability of a low cost and low power receiver in order to extend the DVB-S standard to mobility. The objective of this project is to suggest solutions to overcome technological bottlenecks fot the realization of such a demonstrator with 65 nm CMOS technology. This report composed of four chapters, describes all steps from the specification definition to the performances of the antenna array and the receiver through the architecture study and the different blocks design. [...]
Toussain, Claude. "Etude et réalisation de nouveaux concepts d'assemblage et d'encapsulation en boitiers plastique très faible coût pour puces MMIC fonctionnant jusqu'à 100GHzs". Limoges, 2009. https://aurore.unilim.fr/theses/nxfile/default/848a50b9-1363-4397-884b-f8eae1272577/blobholder:0/2009LIMO4049.pdf.
Pełny tekst źródłaThe work presented in this thesis report shows the growing need to use 3D electromagnetic simulation tools to take into account the parasitic effects due to increasing the operating frequency of microwave devices in order to cope with saturation bands of frequencies. These tools are used to model the various interconnections within a single system. The major challenge for these systems is to remain low cost to target a mass market. We initially optimized a type of plastic packaging, the QFN, to operate at higher frequencies while remaining in a standard manufacturing process. Many applications are being developed in the E-band (60-90GHz), we developed a new type of surface mountable plastic packaging based QFN and operating in this frequency band. Finally, we defined a design methodology for a transition from a MMIC chip to the host substrate are wireless and can operate in the band E through technology "Hot-Via
Yu, Hai. "Conception de processeur tolérant aux fautes à faible coût et hautement efficace pour remédier aux problèmes de fiabilité dans les technologies nanométriques". Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENT066/document.
Pełny tekst źródłaVarious applications of electronic systems, such as medical implant devices, or cryptographic chips for potable devices require both lower power dissipation and higher level of reliability. Moreover, as silicon-based CMOS technologies are fast approaching their ultimate limits, these requirements become necessary for the entire microelectronics industry. Indeed, by approaching these limits, power dissipation, fabrication yield, and reliability worsen steadily making further nanometric scaling increasingly difficult. Thus, before reaching these limits, these problems could become show-stoppers unless new techniques are introduced to maintain acceptable levels of power dissipation, fabrication yield and reliability. This thesis aims to develop a fault tolerant architecture for logic designs that conciliates the above contradictory challenges and provides a global solution to the yield, reliability and power dissipation issues in current and future nanometric technologies. The proposed fault tolerant architecture is expected to improve the fabrication yield and reliability while reducing the power dissipation of electronic components. It leads a breakthrough, since traditional fault-tolerant architectures introduce significant area and power penalties
Theillet, Gérald. "Développement d'un support microfluidique papier pour le diagnostic bas coût d'arboviroses émergentes". Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0725/document.
Pełny tekst źródłaThe incidence of arboviruses infections has increased dramatically in recent decades in tropical and sub-tropical areas worldwide. Dengue and chikungunya viruses are typically transmitted by mosquitoes and can cause a wide range of symptoms, and sometimes death. Although conventional diagnostic tests can provide diagnosis of acute infections, access to these tests is often limited in developing countries. Early and prompt diagnosis is crucial to improve patient management. Consequently, there is an urgent need to develop affordable, simple, rapid, and robust tools that can be used at ‘Point of Care’ settings.We developed and evaluated a PAD for the detection of the dengue Non Structural 1 (NS1) viral protein in blood and plasma samples. The PAD was able to detect specifically 10 ng.mL-1 of NS1 protein in various sample types and in 6-8 minutes. Secondly, an improved version of the PAD obtained by laser cutting was designed and tested for the detection of dengue NS1 protein and virus-specific IgM in blood and plasma. Each parameter could be detected in 8 minutes. PAD development performed on dengue fever was then applied to the detection of chikungunya virus IgM in human sera, using viral Pseudo-Particles (PPs). These synthetic antigens have proven to be powerful tools for specific IgM detection. The results obtained showed a sensitivity of 70.6% and a specificity of approximately 98% with a time to results of less than 10 minutes. The PAD showed few cross reactions with other arbovirusess. The PPS were finally characterized with different physico-chemical methods in order to determine the key factors of their performances
Montagnier, Guillaume. "Recherche de compagnons de faible masse par optique adaptative". Phd thesis, Grenoble 1, 2008. http://www.theses.fr/2008GRE10289.
Pełny tekst źródłaLn the last decade, the field of the search and study of cold companions around solar neighborhood stars has greatly improved. The study of low mass stellar compani?ns and brown dwarf companions brings important constraints in the unclerstanding of stellar formation. The study of planetary sys¬tems allows us to understand the formation of our own solar system. Up to now, most systems were cliscovered with the radial velocities technique. This technique is an indirect method that prevents from analysing the photons of a cold companion. The next step consists in detecting and analysing the photons of such companions. Many projects of high contrast imaging instruments have been re¬cently cleveloped in orcier to fulfil this task. This thesis was inspired by the scientific preparation and the development of such a project : the SPHERE instrument that will be installed at the Very Large Telescope in Chile in 2012. Ln the first part, 1 introduce the astrophysical questions that motivate the search for star companions and de scribe the two observation techniques that 1 used during my PhD : high contrast imaging and radial velocities techniques. A state of art about the status of the search for low mass stellar compa¬nions, brown clwarf companions and planetary companions is also done. Ln the second part, 1 clescribe the observation, data reduction and analysis techniques 1 used. The third part presents a study on the brown dwarf desert around around solar type stars that were selected from a sample of stars with radial velocity drift. Ln the fourth part, 1 clevelop an observation work that consists in detecting the planetary or brown dwarf companions around red dwarfs. The last part is devoted to the description of the SPHERE instrument and to my own contribution into this instrumental project
Montagnier, Guillaume. "Recherche de compagnons de faible masse par Optique Adaptative". Phd thesis, Université Joseph Fourier (Grenoble), 2008. http://tel.archives-ouvertes.fr/tel-00714874.
Pełny tekst źródłaYu, H. "Conception de processeur tolérant aux fautes à faible coût et hautement efficace pour remédier aux problèmes de la fiabilité dans les technologies nanométriques". Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00837746.
Pełny tekst źródłaGallée, François. "Conception d'antennes pour radar automobile détecteur d'obstacles à 76 GHz : réalisations à base de réflecteurs et de lentilles artificielles sur substrat faible coût". Brest, 2001. http://www.theses.fr/2001BRES2032.
Pełny tekst źródłaBerger, Sébastien. "Croissance de silicium monocristallin en couche mince par épitaxie en phase liquide sur couches sacrificielles pour report sur substrat faible coût pour applications photovoltai͏̈ques". Lyon, INSA, 2003. http://theses.insa-lyon.fr/publication/2003ISAL0010/these.pdf.
Pełny tekst źródłaThe work appeals to the use of sacrificial layers as support to a growth by liquid phase epitaxy to obtain sun cells. Three sorts of sacrificial layers are studied: the macro porous silicon or grids, the nanoporous silicon and the layers weakened by Ionic setting-up. The macro porous silicon allows to control the porosity and thus the fragility of the layer. Lt is easily detachable and transferable. The used substrate is recyclable. The transfer is made before the growth. A work on the material silicon to allow an electrochemical etching was led. It was necessary to define the characteristics of the grid wished to be able to realise over a growth. The transfer, followed by a growth, was realised during this work. The support orientated (100), leads to morphology of pyramidal layer. The adaptation of the parameters allows to improve the coalescence between pyramids. During this work, a phenomenon was observed: the consumption of the silicon of the growth substrate. A study was led in on supports SOI to adjust the parameters connected to the growth. To reduce the costs, it was intended to realise the epitaxy before the transfer. The layers of nanoporous silicon then appeared as the continuance of the study. The characteristics of it porous were studied to allow the detachment of the epitaxial layer. Layers obtained on substrate (100) are formed by pyramids. The coalescence of which is a function of parameters of the epitaxy. On substrate (111), the obtained layers are continuous and homogeneous and the detachment is realised. Another way consists in adapting the technique of Ionic setting-up of the SMART-CUT ® to the photovoltaic area. This embrittlement evolves with the thermal treatment of the growth. The work of epitaxy on these embrittlement allowed to obtain continuous layers
Sagna, Alphousseyni. "Etude et élaboration par Close-Spaced Vapor Transport (CSVT), d’absorbeurs Cu2ZnSnS4 en couches minces polycristallines destinées à la réalisation de photopiles à faible coût". Thesis, Perpignan, 2016. http://www.theses.fr/2016PERP0035/document.
Pełny tekst źródłaThe kësterite Cu 2 ZnSnS 4 (CZTS) is a p-type semiconductor material made from abundant and nontoxic chemical elements. These advantages in addition to a direct band gap, with energy between 1.45eV and 1.5 eV, make it an excellent candidate for replacement of Cu(In, Ga)Se 2 and CdTe absorber layers currently used in thin film solar cells. It has although been highlighted that photovoltaic devices based on thin CZTS absorber layers are highly suffering from the presence of secondary phases in the thin films. So the work presented in this thesis describes thin CZTS layers deposition by a simple and low-cost process called Close Spaced Vapor Transport (CSVT). Its main objective is to realize a CZTS compound free of any secondary phase with the aim of improving conversion efficiencies of CZTS thin films based photovoltaic solar cells. For this purpose, the bulk CZTS material was first synthesized in the form of ingot by a slow cooling of a molten stoichiometric mixture of pure elements. Characterizations realized on this bulk material showed that it relates to a single phase, quasi-stoichiometric Cu 2 ZnSnS 4 compound in the kësterite structure. The ingot was milled into powders and pressed to give 1 mm thick pellets. These pellets were therefore used as evaporating sources in a CSVT reactor with iodine as transport agent, for the thin CZTS layers deposition. Optimizations of the key deposition parameters that are substrate temperature and iodine pressure were performed. The Results of the investigations conducted on the CZTS layersdeposited at substrate temperature in the range 460 °C-500 °C, under iodine pressure in the order of 2 kPa to 4 kPa, revealed excellent physico-chemical properties
Schreider, Ludovic. "Antennes à très large bande passante et de très faible épaisseur : application à l'intégration d'antennes dans des structures de porteurs dans la bande 100 MHz-1GHz". Paris, ENST, 2006. http://www.theses.fr/2006ENST0040.
Pełny tekst źródłaOne of the major stakes in the integration of new Electronic Warfare (EW) systems into defence carriers is the reduction of the obstruction of antennas. The bandwidth of the antennas which are used in EW applications can be about 10:1 and the lowest frequency can be close to the hundred of MHz, which makes the integration of the antennas very difficult even impossible according to cases. EW antennas are usually placed above an absorbing cavity. The manufacture of absorbing material is today still "handmade" and thus very expensive. Moreover, these materials are heavy and they do not exhibit the same electric characteristics of one manufacture at the other. The work presented in this report is devoted to the realization of wideband antennas with very low thickness and without absorbing material. We proposed and validated a new structure based on Electromagnetic Band Gap substrate. The new structure makes it possible to remove absorbing materials, to reduce the thickness of the antennas and to reduce the manufacturing costs. The new structure has contrary to all other EBG structures the advantage of being ultra broad band and compact (about 1/100th of wavelength thick). We showed the interest to use such a device to reduce the thickness and to improve the performances of the planar antennas of form and unspecified polarization
Daigle, Olivier. "Spectro-imagerie optique à faible flux et comparaison de la cinématique Hα et HI d'un échantillon de galaxies proches". Aix-Marseille 1, 2010. http://www.theses.fr/2010AIX10141.
Pełny tekst źródłaA new EMCCD (Electron multiplying Charge Coupled Device) controller is presented. It allows the EMCCD to be used for photon counting by drastically taking down its dominating source of noise : the clock induced charges. A new EMCCD camera was built using this controller. It has been characterized in laboratory and tested at the observatoire du mont Mégantic. When compared to the previous generation of photon counting cameras based on intensifier tubes, this new camera renders the observation of the galaxies kinematics with an integral field spectrometer with a Fabry-Perot interferometer in Ha light much faster, and allows fainter galaxies to be observed. The integration time required to reach a given signal-to-noise ratio is about 4 times less than with the intensifier tubes. Many applications could benefit of such a camera: fast, faint flux photometry, high spectral and temporal resolution spectroscopy, earth-based diffraction limited imagery (lucky imaging), etc. Technically, the camera is dominated by the shot noise for flux higher than 0. 002 photon/pixel/image. The 21 cm emission line of the neutral hydrogen (HI) is often used to map the galaxies kinematics. The extent of the distribution of the neutral hydrogen in galaxies, which goes well beyond the optical disk, is one of the reasons this line is used so often. However, the spatial resolution of such observations is limited when compared to their optical equivalents. When comparing the HI data to higher resolution ones, some differences were simply attributed to the beam smearing of the HI caused by its lower resolution. The THINGS (The HI Nearby Galaxy Survey) project observed many galaxies of the SINGS (Spitzer Infrared Nearby Galaxies Survey) project. The kinematics of THINGS will be compared to the kinematic data of the galaxies obtained in Ha light. The comparison will try to determine whether the sole beam smearing is responsible of the differences observed. The results shows that intrinsic dissimilarities between the kinematical tracers used are responsible of some of the observed disagreements. The understanding of theses differences is of a high importance as the dark matter distribution, inferred from the rotation of the galaxies, is a test to some cosmological models
Mohellebi, Hakim. "Conception et réalisation de systèmes de restitution de mouvement et de retour haptique pour un simulateur de conduite à faible coût dédié à l'étude comportementale du conducteur". Evry-Val d'Essonne, 2005. http://www.theses.fr/2005EVRY0033.
Pełny tekst źródłaVauché, Rémy. "Conception de générateurs d'impulsions ultra-large bande en technologie CMOS". Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10098.
Pełny tekst źródłaThe information theory developed by Claude Shannon (1916 - 2001) highlights the fact that in order to increase the capacity of a transmission channel, it is preferable to extend the bandwidth used rather than the transmission power. This finding is the starting point of many papers on Ultra-Wideband (UWB) which led to the creation in the United States of UWB band since 2002 where no modulation is privileged. Two years later, many works on Impulsionnal Radio UWB (IR-UWB) communications began at IM2NP including the design of low noise amplifier, power detector, but also pulse generators which is the key element of IR-UWB emitters. These form basis of works presented in the manuscript that took place from 2008 to 2011. The discontinuous nature of communications impulse was first implied the introduction of new figures of merit for measuring performances of pulse generators. Then it deals with design techniques for sizing structures operating at frequencies involved, but also to reduce consumption and especially static leakage to reduce enough power consumption for embedded systems. Finally three architectures of pulse generators are developed, each one responding to different constraints in terms of frequency, consumption and range
Tiphène, Didier. "Etude à basse température (4.2 k) du fonctionnement d'une matrice de détection InSb-Mis, à lecture CID, sous très faible flux de photons : applications astronomiques". Phd thesis, Université Paris Sud - Paris XI, 1987. http://tel.archives-ouvertes.fr/tel-00725271.
Pełny tekst źródłaSantos, Joël. "L’aversion extrême aux risques majeurs : une approche économique basée sur le modèle de l’utilité espérée dépendante des rangs". Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL12011.
Pełny tekst źródłaThe objective of this thesis is to characterize individuals’ aversion to major risks. This characterization relies on the notion of willingness-to-pay (to avoid this type of risks) and calls for the expected utility (EU) model and the rank-dependent expected utility (RDEU) model developed by Quiggin (1982). These models identically deal with monetary consequences but differ as regards to the treatment of probabilities. In the context of major risks, RDEU leads to a potentially high overvaluation of very low probabilities. Based on an approximation method of willingness-to-pay that is well-suited to the study of major risks, we show that the willingness-to-pay of an RDEU decision-maker may be substantially higher than the willingness-to-pay of an EU decision-maker. In particular, the extent of this difference in terms of willingness-to-pay is strictly equivalent to the extent of the subjective overvaluation of very small objective probabilities of loss. In addition to this theoretical result, this thesis leads an experimental investigation that uses the (gamble-)tradeoff method of elicitation (Deneffe & Wakker, 1996). The experiment confirms the standard result of the RDEU model according to which individuals overweight very small probabilities. This experiment also emphasizes on the fact that such overweighting is all the more so large as the objective probability is small. Using both theoretical and experimental results of this thesis we eventually investigate the case of the subjective cost of major risks, dealing with a serious nuclear accident in particular. Our results show that this cost translates into willingness-to-pay levels that are way higher under RDEU than under EU. Such differences between the two models as regards to willingness-to-pay unambiguously show the impact of the extent of overweighting of very small probabilities on the characterization of individual behaviors towards major risks
Prêle, Damien. "Instrumentation cryogénique bas bruit et large bande en technologie SiGe". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2006. http://tel.archives-ouvertes.fr/tel-00332421.
Pełny tekst źródłaMarin, Thibault. "Conception et validation d'un nouvel outil d'évaluation de la stabilité posturale en position érigée". Thesis, Reims, 2018. http://www.theses.fr/2018REIMS035.
Pełny tekst źródłaDesign and validation of a new tool for assessing postural stability in quiet standing(SAP3D: 3D Postural Analysis System)Postural stability in quiet standing is a subject’s ability to maintain its balance or to regain it after a perturbation. Multiple organs contribute to ensure postural stability, under a regulation ensured by the central nervous system. The alteration of one or several of these organs (following a trauma, a pathology or simply due to ageing) modifies the subject’s behavior and its ability to maintain stability. Current systems for postural evaluation rely mostly on center of pressure and/or center of mass assessment, disregarding the intersegmental postural behavior: such measurements are possible, but most tools are complex and expensive. The SAP3D system was developed as a new tool for postural stability assessment, allowing for center of mass and multi-segmental three dimensional modeling based on a single inexpensive camera. Validation of the SAP3D system compared to a standard optoelectronic system shows excellent agreement and a satisfyingly low average residue between the two systems. In a clinical setup, the SAP3D system confirms that postural steadiness mechanisms are i) less efficient with eyes closed than eyes opened; ii) negatively affected by ageing; iii) positively affected by regular practice of an activity such as dancing, at least for young women; iv) altered in pathological or injured patients. Although many technical improvements are being considered, the SAP3D system is a reliable, quick, accessible and low-cost clinical alternative to the existing systems for postural evaluation.Keywords: balance; steadiness; motor control; kinematics; center of mass; elderly; ageing; dance; low-cost
Errahmane, Karim. "Etude du détecteur de traces de l'expérience NEMO3. Simulation de la mesure de l'ultra-faible radioactivité en $^(208)$Tl des sources de l'expérience NEMO3 candidates à la double désintegration BETA sans émission de neutrino". Phd thesis, Université Paris-Diderot - Paris VII, 2001. http://tel.archives-ouvertes.fr/tel-00006621.
Pełny tekst źródłaGhorbel, Imen. "Génération de fréquences agiles pour petits objets communicants autonomes". Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4363.
Pełny tekst źródłaThe rapid growth of the Internet of Things (IoT) applications and the wireless sensor networks boosts the need for low cost and low power radiofrequency (RF) transceivers. The voltage-controlled oscillator (VCO) is an essential building block of several RF transceivers. Design tradeoffs have been very stringent in terms of power consumption, phase-noise, area and tuning range. In this context, the aim of this work is to propose a design method, aiming to optimize the VCO design and to improve its performances essentially in terms of power consumption and phase noise.The first part of this thesis sets a study of the elements of passive LC oscillators in CMOS technology. The second part presents a complete design method, aiming to optimize the LC-VCO performance regarding the phase noise and power consumption. The evaluation of the proposed method is carried out with some test-cases in full CMOS technology. Many RF LC-VCOs have been implemented and measured. The final part of this thesis presents a new tunable VCO suitable for multi-standards applications. The frequency tuning of the VCO is ensured using an active inductor based on CMOS inverters. The desired bandwidth can be selected while achieving low surface area and low power consumption
Jay, Jacques. "Architecture et traitements d'images temps réel appliqués à l'étude des écoulements". Habilitation à diriger des recherches, Université Jean Monnet - Saint-Etienne, 2005. http://tel.archives-ouvertes.fr/tel-00225400.
Pełny tekst źródłaEnfin, des méthodes optiques associées à des techniques de traitements d'images ont été utilisées dans le cadre d'étude de transfert de chaleur entre une pièce usinée et l'outil.
De, Souza Marcelo. "Conception d'amplificateur faible bruit reconfigurable en technologie CMOS pour applications de type radio adaptative". Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0295/document.
Pełny tekst źródłaMobile communication systems allow exploring information in complex environments by means of portable devices, whose main restriction is battery life. Once battery development does not follow market expectations, several efforts have been made in order to reduce energy consumption of those systems. Furthermore, radio-frequency systems are generally designed to operate as fixed circuits, specified for RF link worst-case scenario. However, this scenario may occur in a small amount of time, leading to energy waste in the remaining periods. The research of adaptive radio-frequency circuits and systems, which can configure themselves in response to input signal level in order to reduce power consumption, is of interest and importance. In a RF receiver chain, Low Noise Amplifier (LNA) stand as critical elements, both on the chain performance or power consumption. In the past some techniques for reconfigurable LNA design were proposed and applied. Nevertheless, the majority of them are applied to gain control, ignoring the possibility of linearity and noise figure adjustment, in order to save power. In addition, those circuits consume great area, resulting in high production costs, or they do not scale well with CMOS. The goal of this work is demonstrate the feasibility and advantages in using a digitally controlled LNA in a receiver chain in order to save area and power
Os sistemas de comunicação móveis permitem a exploração da informação em ambientes complexos através dos dispositivos portáteis que possuem como principal restrição a duração de suas baterias. Como o desenvolvimento da tecnologia de baterias não ocorre na velocidade esperada pelo mercado, muitos esforços se voltam à redução do consumo de energia dos circuitos eletrônicos destes sistemas. Além disso, os sistemas de radiofrequência são em geral projetados para funcionarem de forma fixa, especificados para o cenário de pior caso do link de comunicação. No entanto, este cenário pode ocorrer em uma pequena porção de tempo, resultando assim no restante do tempo em desperdício de energia. A investigação de sistemas e circuitos de radiofrequência adaptativos, que se ajustem ao nível de sinal de entrada a fim de reduzir o consumo de energia é assim de grande interesse e importância. Dentro de cadeia de recepção de radiofrequência, os Amplificadores de Baixo Ruído (LNA) se destacam como elementos críticos, tanto para o desempenho da cadeia como para o consumo de potência. No passado algumas técnicas para o projeto de LNA reconfiguráveis foram propostas e aplicadas. Contudo, a maioria delas só se aplica ao controle do ganho, deixando de explorar o ajuste da linearidade e da figura de ruído com fins de economia de energia. Além disso, estes circuitos ocupam grande área de silício, resultando em alto custo, ou então não se adaptam as novas tecnologias CMOS de baixo custo. O objetivo deste trabalho é demonstrar a viabilidade e as vantagens do uso de um LNA digitalmente configurável em uma cadeia de recepção de radiofrequência do ponto de vista de custo e consumo de potência
Guerin, Mathieu. "Conception de circuits électroniques au moyen de la technologie CMOS organique imprimée". Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4780/document.
Pełny tekst źródłaDuring the past few years, the field of organic electronics has known an important development. The CEA LITEN is able to manufacture N-type and P-type screen-printed transistors on a same plastic sheet, enabling the design of complementary circuits. The performances and limitations of this technology are studied since one of this thesis’ main objectives is to determine the feasibility of a fully-printed organic RFID tag. Such a tag would be flexible and could be manufactured at an extremely low-cost. Some circuits commonly used in the RFID tags, and using up to 50 transistors, are designed and tested, showing some performances equivalent or above the reported latest developments. The organic electronics manufacturing process is not as mature as the one used in the classical silicon industry. Therefore, a study is performed concerning the effects of this process scattering, as well as the ageing, on the circuits’ performances. The main improvements (in terms of reliability, organic semi-conductor mobility, size) that can help the organic electronics in order to compete, one day, with the silicon industry, are discussed
Louaas, Alexis. "Insurability of catastrophic risks". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX038/document.
Pełny tekst źródłaThis thesis addresses several aspects of the insurability of catastrophic risks. In a first chapter, we focus on very low probability events and we show how hybrid financial instruments can be used to extend the domain of insurablerisks. Our application to the case of nuclear accidents using cat-bonds data in France shows that despite the higherprice of reinsurance for low probability events, it is advisable to insure more than is currently provided for by the Frenchlaw. The second chapter takes on the issue of why reinsurance is more costly for low probability events. We show thatbecause catastrophic risks have a systemic component, they give rise to a risk premium in equilibrium which decreasesat a lower pace than the willingness to pay for insurance. We use this finding to explain why systemic low probability catastrophes are hard to insure. The third chapter investigates the role of mutual and participating contracts to improveinsurability. Such contracts are necessary for people to adjust their demand for insurance when individual losses are correlated. Finally, the fourth chapter investigates the use of cat-bonds to hedge the risk of extreme agricultural suppliesprice variations. By issuing a cat-bond, the firm that purchases supplies borrows a capital that can be retained in caseof catastrophe. Such a solution would combine the advantage of risk-pooling, to lower the price of insurance, with lowerbasis risk compared to more traditional hedging strategies such as future purchases
Rhouni, Amine. "Étude de fonctions électroniques en technologie ASIC pour instruments dédiés à l'étude des plasmas spatiaux". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00974808.
Pełny tekst źródłaPortalier, Elodie. "Etude du bruit excédentaire, en 1/f, aux basses fréquences dans les dispositifs basés sur l’effet Magnéto-Impédant Géant". Caen, 2016. http://www.theses.fr/2016CAEN2041.
Pełny tekst źródłaThe Giant Magneto-Impedance effect (GMI) consists in the large variation of the impedance of a ferromagnetic conductor excited by a high frequency alternative current and submitted to a variation of an external magnetic field. This thesis work presents the study of the low frequency, 1/f, excess noise in GMI based devices. The latter limiting the noise performances of the device. The determination of the noise contribution of each stage of the instrumentation channel including the polarization stage, the sensing element and the electronic conditioning stage have been determined using frequency coherence measurements. We have shown that the low frequency noise level is strongly dependent upon the excitation conditions. This original technic has permitted the evaluation of the intrinsic noise of the GMI based device. Furthermore, a frequency dependent theoretical model of the intrinsic noise of the GMI microwire is proposed. The latter takes into account the mechanism of the magnetization direction fluctuations as the cause for the instrinsic noise of the microwire. From the Fluctuation-Dissipation theorem, we express the equivalent magnetic noise power spectral density. The latter is directly proportional to the frequency dependence of the imaginary part of the magnetic susceptibility,. Thus, two experimental methods are implemented in order to evaluate it. Finally, a comparison is carried out between the equivalent magnetic noise level measured and expected. A good agreement is found implying that the noise model proposed is efficient to reasonably quantify the low frequencies excess noise of GMI microwires
Mansour, Malik. "ETUDE ET MISE EN OEUVRE DE MAGNETORESISTANCES ANISOTROPES ET A EFFET TUNNEL POUR LA MESURE DES CHAMPS MAGNETIQUES FAIBLES DANS LES PLASMAS SPATIAUX". Phd thesis, Ecole Polytechnique X, 2012. http://pastel.archives-ouvertes.fr/pastel-00835740.
Pełny tekst źródłaTraore, Papa Silly. "Introduction des techniques numériques pour les capteurs magnétiques GMI (Giant Magneto-Impedance) à haute sensibilité : mise en œuvre et performances". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT061/document.
Pełny tekst źródłaThe Giant Magneto-Impedance (GMI) is a large change of the impedance of some soft ferromagnetic materials, supplied by an alternating high-frequency excitation current, when they are submitted to an external magnetic field. This thesis presents the design and performance of an original digital architecture for high-sensitivity GMI sensors. The core of the design is a Digital Signal Processor (DSP) which controls two other key elements: a Direct Digital Synthesizer (DDS) and a Software Defined Radio (SDR) or digital receiver. The choice of these digital concepts is justified by the will to reduce the conditioning electronics noise that limits the equivalent magnetic noise level. The latter characterizes the smallest measurable field by the sensor. The developed conditioning system is associated with the off-diagonal magnetic configuration in order to increase the intrinsic sensitivity of the sensitive element. This magnetic configuration consists of the use of an additional a pick-up coil wound around the ferromagnetic material. This association also makes it possible to obtain an asymmetrical characteristic (odd function) of the sensor response near the zero-field point and to consequently allow for sensor implementation and use without any bias magnetic field. Thus, this choice eliminates, or at least minimizes, the problems related to the offset cancelling of the GMI devices. Also, it validates the advantage of this magnetic configuration, especially the choice of the operating point. Modeling of the noise performance of the entire measurement chain, including the digital conditioning, is performed. A comparison between the expected and measured equivalent magnetic noise levels is then carried out. The results yield general optimization laws for a digital GMI sensor. Using these laws, an optimized prototype of a GMI sensor is designed and implemented on FPGA. An equivalent magnetic noise level in a white noise zone region of approximately 1 pT/√ Hz is obtained. Furthermore, this work also makes it possible to validate the interest of digital techniques in the realization of a high-sensitivity measuring devices
Ghorbel, Imen. "Génération de fréquences agiles pour petits objets communicants autonomes". Electronic Thesis or Diss., Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4363.
Pełny tekst źródłaThe rapid growth of the Internet of Things (IoT) applications and the wireless sensor networks boosts the need for low cost and low power radiofrequency (RF) transceivers. The voltage-controlled oscillator (VCO) is an essential building block of several RF transceivers. Design tradeoffs have been very stringent in terms of power consumption, phase-noise, area and tuning range. In this context, the aim of this work is to propose a design method, aiming to optimize the VCO design and to improve its performances essentially in terms of power consumption and phase noise.The first part of this thesis sets a study of the elements of passive LC oscillators in CMOS technology. The second part presents a complete design method, aiming to optimize the LC-VCO performance regarding the phase noise and power consumption. The evaluation of the proposed method is carried out with some test-cases in full CMOS technology. Many RF LC-VCOs have been implemented and measured. The final part of this thesis presents a new tunable VCO suitable for multi-standards applications. The frequency tuning of the VCO is ensured using an active inductor based on CMOS inverters. The desired bandwidth can be selected while achieving low surface area and low power consumption
Alarcon, Juvenal. "Conception d'antennes et de tags RFID UHF pour environnements hostiles, application au projet RFID AERO". Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4703.
Pełny tekst źródłaThis Ph.D thesis is part of the FUI RFID AERO project led by Eurocopter. The aim of this project is to provide a traceability system of the aircraft items. This work focuses on low-cost UHF RFID reader antennas and tags design.Two research axes are developed. The first one is the RFID reader antennas design for metallic surfaces. The designs are based on constructive wave phenomenon by placing a metallic plate at a quarter wavelength of the radiating element. On the other hand, the insertion of AMC structures was also studied. Furthermore, we propose a size reduction technique for AMC structures. The second goal is tag size miniaturization for metallic or non-metallic objects identification. We propose design methods of size miniaturization for hard or flexible tags. Besides, we apply these methods by designing one tag for each family.Finally, the reader antennas and tags proposed in this thesis, the RFID readers and the related systems developed by the others partners were implemented into an aircraft. Tests of the complete system are in good agreement with the expected goals
Da, Rocha Marques Daniel. "Conception d'antenne tag sur le corps humain et d'antenne lecteur en RFID UHF". Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4325.
Pełny tekst źródłaThis thesis was initiated within the VEADISTA project. The main goal of this project was to develop a cost effective technological remote care system for fragile person. The main focus of this thesis is on antenna design for RFID reader and also for RFID tags in contact with human body. For the reader antenna the criteria are: a circularly polarized radiated field, high gain, cost effectiveness and small thickness. To achieve these objectives, a miniaturized slot ring topology obtained by an iterative method of ring folding associated with a reflector including a reduced unit cells AMC are used. For the tag the objective is to design a broadband antenna, by minimizing the influence of human body without affecting the reading scope. The tag is needed to also be cost effective. An electromagnetic model of human forearm is used as the broadband tag antenna design support. Ultimately, the functionality of the complete system including a tag and a reader have been tested