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Nguyen, Tran Quang Khai. "Développement de système antennaire pour les communications 5G". Thesis, Université Côte d'Azur, 2020. http://www.theses.fr/2020COAZ4100.
Pełny tekst źródłaThe work in this thesis has been funded by the French FUI project MASS-START (2017-2020). The project aims at the integration of 5G compatible baseband and radio subsystems into an Over-Air-Interface-based 5G terminal and gNodeB demonstrator, and the antenna array for end-to-end Multiple Input Multiple Output link experimentation. The scope of the thesis concerns the design and assessment of antenna systems that are to be used in the project.At 5G Frequency Range 1 band, the work concentrates on the development of a methodology to design antenna with a matching circuit for mobile terminals with limited area. The bandwidth limitation is evaluated using Quality-Factor. A Particle Swarm Optimization algorithm is proposed and examined in different antenna designs for mobile terminals. The final design demonstrates a system with three non-resonating coupling elements covering most of the sub-6GHz bands of 5G. At 5G Frequency Range 2 band, more precisely band n258 of Europe, different types of array antennas are studied. The work first checks two types of feeding for a patch antenna that can be integrated into Printed Circuit Board to have a low profile antenna and ease the fabrication procedure. The designs are later fabricated and experimentally evaluated. With a Millimeter-Wave array at hand, we proceed a measurement campaign in which the effects of the user's finger at close proximity of the antenna are evaluated. The losses due to absorption, reflection, diffraction are quantified and compared with numerical estimations in literature. A system of multiple end-fire arrays placed at different locations in a terminal is also studied showing the compromising effectiveness if one array is severely blocked
Quan, Yibo. "Performance evaluation and resource allocation in millimeter waves device-to-device networks with beamforming". Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAT024.
Pełny tekst źródłaDevice-to-Device (D2D) communication is a key technology for future wireless networks, allowingdevices to communicate directly without relying on a cellular infrastructure. Millimeter wave (mm-Wave) communication utilizes high-frequency radio, providing very large bandwidths for fast and reliable D2D transmissions. However, mmWave frequencies have high attenuation, requiring devices to have multiple antennas and perform beamforming. The success of beamforming requires beam training. The beam misalignment can impact the performance of the network. To address these challenges, our study focuses on the theoretical analysis of the performance of mmWave D2D communications within the context of Ultra-Reliable Low Latency Communications(URLLC). We use stochastic geometry and queuing theory to evaluate both spatial and temporalvariations in performance from two different perspectives: the instantaneous average properties of the random network and the global stability properties of a dynamic network with random service requests. For the dynamic properties, we focus on the stability condition of D2D network by introducing directional antennas arrays for the D2D users. The network is modeled based on a spatial birth-death process. For the instantaneous properties, we mainly care about the meta-distribution of the network, which is a metric that accounts for the spatial distribution of coverageprobability. We derive the meta-distribution of the effective rate as a statistical latency guarantee for URLLC communications, by considering both the training overhead and misalignment for a D2D network with beamforming. At last, we propose methods to choose the optimal number of antennas and to allocate resource for beam training
Linardou, Irini. "Antenne Vivaldi : potentialités d'applications en ondes millimétriques". Nice, 2000. http://www.theses.fr/2000NICE5455.
Pełny tekst źródłaRay, Brigitte. "Conception, optimisation et réalisation d'un mélangeur quasi-optique en ondes millimétriques". Toulouse 3, 1992. http://www.theses.fr/1992TOU30274.
Pełny tekst źródłaDalle, Christophe. "Contribution à l'étude des dispositifs à jonction P-N en gamme millimétrique : application aux diodes avalanche en régime de génération directe et harmonique". Lille 1, 1986. http://www.theses.fr/1986LIL10099.
Pełny tekst źródłaDemuynck, Claire. "Etude en ondes millimétriques et submillimétriques d'espèces réactives : détection d'ions et de radicaux libres au laboratoire et dans le milieu interstellaire". Lille 1, 1986. http://www.theses.fr/1986LIL10062.
Pełny tekst źródłaFriscourt, Marie-Renée. "Étude des dispositifs à transfert électronique pour la génération de puissance en gamme millimétrique". Lille 1, 1985. http://www.theses.fr/1985LIL10015.
Pełny tekst źródłaWallez, Claire. "Absorption et diffusion des ondes électromagnétiques par les hydrométéores. Application à l'imagerie radiométrique en ondes millimétriques". Toulouse 3, 1994. http://www.theses.fr/1994TOU30089.
Pełny tekst źródłaDerycke, 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.
Pełny tekst źródłaOrlic, Yovan. "Dispositifs flexibles de communication à 60 GHz reconfigurables mécaniquement". Thesis, Ecole centrale de Lille, 2014. http://www.theses.fr/2014ECLI0002/document.
Pełny tekst źródłaThere is an increasing need for tunable antennas in the 60 GHz band for remote sensing application and wireless communication. Traditional tuning solutions are based on semiconductor or conventional RF-MEMS but these component face cost, complexity and losses issues at millimeter waves. In this thesis, an original approach was developed: it is based on the mechanical reconfiguration of millimeter wave microstrip antennas and devices printed on ultrasoft elastomeric PDMS substrate, thanks to large displacement MEMS actuators.First, a quick history and context on the telecommunication explain the recent interest toward the 60 GHz band for telecommunication and the need for tenability and advantage of mechanical tenability at this frequencies. The ultrasoft polymeric PDMS is then studied. It is caracterised both mechanically and dielectrially. Then the different applications developed during this thesis are presented: frequency tunable antenna and beam steering systems. Different actuation solution (pneumatic, magnetic, electro-fluidic interaction) are explored
de, Montera Louis. "Etude de la variabilité micro-échelle des précipitations : application à la propagation des ondes millimétriques en SATCOM". Versailles-St Quentin en Yvelines, 2008. http://www.theses.fr/2008VERS0021.
Pełny tekst źródłaAttenuation time series at EHF band exhibit characteristics similar to some stock exchange rates, which suggests that prediction models originally developed in the finance field might be appropriate. The analysis leads to a non linear ARIMA/GARCH model. In order to predict the uplink attenuation from the downlink attenuation that operates at a different frequency, a frequency scaling model has been added to the prediction model. In order to better understand the link between attenuation and its physical causes, an approach based on rain fractal properties is then presented. An assessment of the effect of rain-no rain intermittency on the multifractal analysis shows that it provokes a break in the scaling and may lead to biased parameters. The multifractal analysis is then performed event by event, i. E. With uninterrupted rain periods. The results show that rain can be modeled by a FIF (Fractionally Integrated Flux) which is threholded in order to simulate rain-no rain intermittency
Boé, Alexandre. "Conception et réalisation de commutateurs MEMS millimétriques pour les antennes intelligentes". Lille 1, 2006. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2006/50376-2006-372.pdf.
Pełny tekst źródłaAmairi, Amor. "Caractérisation en petit signal, en puissance et en impédances des transistors à effet de champ millimétriques : étude et réalisation d'un banc de "load-pull à charge active" 26,5-40 GHz". Lille 1, 1991. http://www.theses.fr/1991LIL10090.
Pełny tekst źródłaVallet, Mathieu. "Synthèse de fréquence multi-bandes couvrant les ondes millimétriques pour les applications WiFi-WiGig". Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0407/document.
Pełny tekst źródłaThe works presented in this manuscript focus on the realization of a millimeter frequency synthesizer meeting the needs of the WiGig-Fi convergence. A first study was conducted to define a suitable low-power frequency synthesizer archi-tecture for WiFi and WiGig standards. All of the PLL components are subsequently detailed, highlighting the 28nm CMOS FDSOI technology benefits. Then, a study of low power millimeter broadband VCO is presented, highlighting a design methodology related to the 28nm CMOS FDSOI technology. Finally, various solutions are proposed in order to improve the PLL performances, with the incorporation of slow wave VCO, or injection locked ring oscillators
Boula-Picard, Reynald. "Contribution à l'étude des amplificateurs optiques à semiconducteur pour applications analogiques". Rennes 1, 2004. http://www.theses.fr/2004REN10072.
Pełny tekst źródłaMedrar, Kossaila. "antennes intégrées haute directivité aux fréquences millimétriques et térahertz". Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT047.
Pełny tekst źródłaThe emergence of multiple applications in the millimeter-wave frequency range, such as very high speed point-to-point communications, 5G and 6G networks, high-definition television, automotive radars and imaging, has encouraged research on high-gain antenna solutions, and more specifically, compact, low-cost and efficient integrated antennas.In this context, this PhD thesis presents a new antenna architecture composed of a transmitarray and a focal source, both printed on a single substrate stack. This architecture allows the implementation of a high gain, monolithic and efficient millimeter-wave front-end module. It is compatible with low-cost printed-circuit-board (PCB) technologies used for mass production, and overcomes technical and cost constraints related to the antenna assembly.This PhD thesis is organized in three main parts. The first one defines the proposed architecture and presents an analytical model of the antenna and the analysis of its typical performances.The second part focuses on the experimental validation of the antenna architecture and its model. Therefore, four V band prototypes (60 GHz) have been developed and characterized experimentally. These prototypes have a volume of 40×40×13.2 mm3 and are designed with different polarizations and phase quantization levels. The experimental gain levels range from 17.8 to 22.1 dBi at 60 GHz with aperture efficiencies of 15‒35% and 3 dB bandwidths of 14‒18%. These promising results allowed us to consider the adaptation of this architecture toward higher millimeter-wave bands.The third part investigates the development of substrate-integrated transmitarray antennas operating in D band (140 GHz) and H band (300 GHz). To this purpose, Fabry-Perot cavity-like unit-cells composed of a resonator and two polarizing grids have been designed. They showed excellent performances in terms of bandwidth (around 50% of -1 dB bandwidth for most unit-cells), insertion losses (0.5 dB on average) and phase quantization (3 bits) in both D band and H band. They also showed high performance stability regarding manufacturing process tolerances such as substrate characteristics variations and etching errors. Using these unit-cells, antenna prototypes of 20×20×4.52 mm3 dimensions have been designed, fabricated and characterized experimentally. They have been manufactured on a single low-cost PCB stack with five metal layers. In D band, a gain of about 20 dBi, an aperture efficiency close to 29% and a -3 dB bandwidth greater than 17.4% have been measured. In H band, prototypes of different sizes have been demonstrated experimentally with gain levels ranging from 20.5 to 23.1 dBi, aperture efficiencies of 12‒17.6% and 3 dB bandwidths of 17‒26.3%.These results validate the proposed monolithic antenna architecture and demonstrate its interest in the design of highly integrated, high gain (> 20 dBi), wideband, compact and efficient millimeter- and submillimeter-wave front-end modules. They also show its compatibility with low-cost manufacturing technologies used for mass production. These conclusions demonstrate that this antenna topology represents an attractive and promising solution for very high frequency applications and in particular very high data-rate wireless communications systems
Lacave, Thomas. "Transistor bipolaire Si/SiGe C en nœud CMOS avancé pour applications (sub)-millimétriques". Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10150/document.
Pełny tekst źródłaSiGe heterojonction bipolar transistors (HBT) available in production qualified BiCMOS technologies today reach maximum oscillation frequencies fMAX close to 300 GHz. These technologies address millimeter-wave applicationsuntil 100 GHz, as collision avoidance radar for automotive (77 GHz), 60 GHz high date rate wireless communications and 100 Gb/s optical communications.. Objective of the work presented in this manuscript was to increase the transit frequenciess, and more especially fMAX, of SiGe HBTs in order to prepare the next BiCMOS generation. First, the theory of the bipolar transistor and the architecture of the device used for our studies are presented. Then, the different parameters defining the vertical doping profile are investigated and their influences on frequency performances, in particular on the trade-off between the current gain transit frequency fT and fMAX are detailed. The reduction of the lateral dimensions of the transistor, performed to reduce parasitic resistances and capacitances, exhibited the benefits but also the limitations of the scaling toincrease fMAX. Those studies enabled to demonstrate the feasability to integrate a 300-GHz fT and 400-GHz fMAX HBT in a 55-nm CMOS node. Finally, the different generations of devices fabricated during this work, exhibiting fT values between 250 GHz and 320 GHz and fMAX values between 330 GHz et 420 GHz, are compared between them and with BiCMOS9MW, a production qualified technology featuring 220 GHz fT and 280 GHz fMAX. This comparison deals with both the noise and the power (large signal) performances at millimeter-wave frequencies. The benefit of the work carried out in this PhD thesis is also demonstrated through the results of circuits designed by partners from different universities. One of those circuits in particular had been used to demonstrate a prototype of an active imaging system at 160 GHz
Mohd, Yusoff Mohd Fairus. "Low-profile antennas at millimeter waves : study of micromachined Fabry-Perot cavity antennas and folded reflectarray antennas". Rennes 1, 2012. http://www.theses.fr/2012REN1S003.
Pełny tekst źródłaLes antennes à faible profil trouvent de multiples applications en raison de leur faible encombrement selon la hauteur, par exemple pour les applications embarquées. Elles possèdent aussi souvent des avantages complémentaires, tels que leur faible poids, leur coût modéré et leur facilité d’intégration. Dans ce travail de thèse, nous avons étudié et comparé deux types d’antennes à faible profil en ondes millimétriques : les antennes à résonateur de Perot-Fabry (PF), et les réseaux réflecteurs repliés. Dans le premier cas (antennes de PF), nous avons étudié de nouvelles configurations d’antennes micro-usinées en bande W, à l’aide de techniques de micro-usinage en surface et en volume. Les configurations étudiées ont été fabriquées et les résultats numériques ont été validés expérimentalement. Dans le second cas, divers réseaux réflecteurs repliés fonctionnant en polarisation linéaire ou en polarisation circulaires ont été étudiés à l’aide d’un outil de conception que nous avons spécifiquement développé pour ces travaux. Les performances de ces antennes ont été analysées, et deux prototypes ont été fabriqués en bande V pour valider les travaux théoriques
Bertrand, Matthieu. "Guides à ondes lentes intégrés dans le substrat pour les applications en bandes RF et millimétriques". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT068/document.
Pełny tekst źródłaThe last decades have seen the evolution of communication networks towardgreater complexity and efficiency, being now able to carry significant data rates. This evolution is the result of both scientific and technological breakthroughs. Thanks to the wide bandwidths available at millimeter-wave frequencies, the future generations will be able to supply for the the increasing demand in multimedia services, especially high-definition videos. The design of wireless systems which operate at high frequencies with acceptable efficiency, costs, and minimum size thus constitute a decisive challenge. In this context, this work focuses on the development of passive circuits such as filters, couplers and waveguides which address these issues. We developed a miniaturization technique for printed circuits technology, which in a first step is dedicated to frequencies below 20 GHz. This technique is based on a slow-wave concept, defined as the property of any structure which impose lower velocities to the electromagnetic waves. A theoretical analysis, as well as design methods were established and confirmed by measurements. Secondly, we proposed two distinct technological solutions for the integration of efficient waveguides at millimeter-wave frequencies. This work was achieved in collaboration with two other laboratories. A theoretical study, design of test features and measurementswere performed. These results intend to constitute a basis for the future realization of miniaturized slow-wave circuits at millimeter-wave frequency bands
El, Haj Shhade Ghayath. "Conception d'antennes reconfigurables pour radars automobiles à 77 GHz : application à la sécurité active". Rennes 1, 2012. http://www.theses.fr/2012REN1S015.
Pełny tekst źródłaAs the number of road crashes keeps on increasing, safety has become a key differentiator in the automotive industry. Future generations of automotive radars are required to resolve complex vehicular traffic scenarios while satisfying a difficult balance between high-performance and low cost. The antenna concept must allow a high degree of flexibility to meet the expectations in terms of field of view, range / velocity / angle measurements. . . The main objective of this thesis is the design of reconfigurable antennas for automotive radars at 77 GHz. Following the definition of the future requirements on bothsystem and antenna levels, we conducted a detailed state-of-art review of the possible solutions. Hence,we established three matrices of choices that take into account several criteria such as performance, cost, maturity of the technology. Our choice fell on designing fixed-frequency reconfigurable leaky-wave antennas. Based on this concept, several solutions have been studied and an original solution has been identified. The latter has been pre-designed in 2D then simulated and optimized in 3D. A fixed-frequency beam-steering solution has also been proposed. Finally, an antenna prototype has beencharacterized, fabricated and measured to validate the numerical results at 77 GHz
Etourneau, Pascal. "Modélisation électromagnétique des interconnexions par la méthode des différences finies dans le domaine temporel (F. D. T. D. ). Application à l'étude des techniques de report de circuits M. M. I. C. Dans le domaine des ondes millimétriques". Limoges, 1997. http://www.theses.fr/1997LIMO0053.
Pełny tekst źródłaDaffé, Khadim. "Caractérisation hyperfréquence sous pointes de nano-dispositifs : métrologie et instrumentation". Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1I080/document.
Pełny tekst źródłaIn the frame of the spectacular development of nano-objects, innovative on-wafer electrical measurement methods must be addressed at the nanoscale. In particular, two main issues have been identified. On one hand, nano-devices exhibit very high dynamic impedance in contrast with conventional measuring microwave instruments. On the other hand, there is an inherent size discontinuity between nano-objects and conventional measurement systems. Given the scientific challenge and a relatively limited state of the art, several avenues of investigation have been explored. First, as part of a European project bringing together metrology laboratories, and the joint laboratory IEMN-STMicroelectronics®, the traceability of nano-devices high impedance measurements is established. In a second step, the development of an electrical on-wafer measuring platform for nano-devices is described. This includes the development of new generations of GSG (Ground-Signal-Ground) miniaturized probes in MEMS (Microelectromechanical systems) technology with reduced access pads. The probes are mounted on a robotic nano-positioning platform integrated in a scanning electron microscope
Benzaim, Oussama. "Techniques multi-port pour la conception et la réalisation de systèmes micro-ondes dédiés à l'évaluation non destructive de matériaux". Electronic Thesis or Diss., Lille 1, 2009. http://www.theses.fr/2009LIL10031.
Pełny tekst źródłaNon Destructive microwave Testing (NDT) consists in examining a material so that after testing, its future use is not affected. Such characterization is usually achieved through the measurement of reflection and/or transmission properties of the material under test by a vector network analyzer. However, this type of equipment is oversized in terms of measurements abilities and cost for a use outside the laboratory. In order to overcome this limitation, we have developed, with a view to low cost, systems based on the six-port technique. In particular, a dual four-port reflectometer is developed for the measurement of reflection and transmission parameters of passive devices in the frequency range of 55 - 65 GHz. In addition, we have proposed complete solution which integrates hardware and software resources allowing the development of specialized systems in the field of microwave characterization. The added software solutions, based on artificial neural networks contribute to satisfy the needs of a non-destructive, quantitative evaluation. Finally, in order to perform characterization of defects whose dimensions are smaller than the wavelength, a mm-wave microscope formed by the mm-wave system and associated with an evanescent wave probe has been proposed. This ensemble reveals changes in magnitude and phase reflection coefficients of the material under test, allowing non-contact measurements. ___________________________________________________________________________
Geynet, Boris. "Développement et étude de transistors bipolaires à hétérojonctions Si/Si/Ge : C pour les technologies BiCMOS millimétriques". Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10150/document.
Pełny tekst źródłaSi/SiGe:C heterojunction bipolar transistors integrated in BiCMOS technologies now reach cut-off frequencies fT and fmax larger than 200GHz. This allows them to address millimeter-wave applications up to 100GHz such as anti-collision automobile radars and optical and wireless communications. The purpose of this thesis is the development and the study of Si/SiGe:C HBTs for millimeter-wave BiCMOS technologies. After a reminder of the bipolar transistor theory, we show the methods of fabrication, characterization and modeling of high-speed devices. The architectures chosen by the main manufacturers of the semiconductor market are detailed and the obtained performances are compared. Then, we present the investigations driven for the development of the BiCMOS9MW technology from STMicroelectronics. A low-cost version of the high-speed HBT and a high-voltage device fully compatible with the technology are presented and the state-of-the-art results are shown. We also study the impact of the variations of the technological parameters and the design mIes on the main characteristics of devices. The last part of this work is dedicated to the development of new technological solutions in order to further improve the transition frequency fT of Si/SiGe:C HBTs. An optimization of the vertical profile has been realized thanks to the development of a new collector module using a selective epitaxy and to the reduction of the thermal budget during the devices fabrication. This last study leads to an improvement of the transition frequency fT above 400GHz at room temperature, this is the best performance obtained to date for a transistor in silicon technology
Ktari, Mohamed Aymen. "Machine Learning for beam Alignment in mmWave massive MIMO". Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAT047.
Pełny tekst źródłaThe escalating demand for spectral efficiency driven by the stringent requirements of 5G networks has spurred the development of mmWave MIMO technology, promising significant architectural improvements through advanced precoding techniques. This technology presents substantial gains in spectral and energy efficiencies compared to traditional MIMO systems. However, the transformative potential of mmWave MIMO is hampered by the complex realities of real-world urban environments and the intricate physical properties inherent to mmWave frequencies.Crucially, in mmWave massive MIMO communication, beamforming and combining play pivotal roles: the high bandwidth and operating frequency of mmWave systems necessitate analog domain beamforming/combining, rendering fully digital approaches technically non feasible. At the heart of mmWave large-dimensional MIMO lies the Beam Alignment problem, requiring the identification of optimal transmit and receiver beam pairs that maximize the Signal-to-Noise ratio, ensuring a robust initial link.Existing standards, such as WiGig, employ exhaustive beam sounding methods, testing each possible beam pair to find the one maximizing SNR. Consequently, it leads to substantial pilot-signaling overhead, the major problem we aim to encounter throughout this PhD. Our research revolutionizes Beam Alignment by integrating cutting-edge machine learning techniques for Partial Beam Alignment, significantly reducing the pilot overhead by soundings a subset of beam pairs using sub-sampled codebooks. Therefore, we leverage the received signal energies from these beam pairs soundings, employing shallow neural networks, matrix factorization, and their variants for accurately resolving non-linear and logistic regression problems, crucial for determining the quality of the remaining beam pairs.A fundamental objective of this thesis is to determine the sample complexity for these machine learning methods. This complexity dictates the minimum number of training samples necessary for effective learning and reliable transmission. We delve into the performance of the proposed ML models without prior channel estimation, introducing the concept of Blind Beam Alignment, thus pioneering a paradigm shift. Furthermore, our research delves deep into the nuances of quantization, a vital practical constraint. We then explore critical compromises: identifying the minimum overhead ratio corresponding to the optimal quantization scheme on the one hand and navigating the classic trade-off between accuracy and complexity on the other hand.Through systematic progression, ranging from basic point-to-point narrowband scenarios to intricate wideband multi-user architectures, this PhD thesis offers valuable insights and solutions. The proposed contributions advance the fields of mmWave communications and Machine Learning applications in wireless systems, outperforming existing benchmarks, and encountering the limitations of conventional approaches
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.
Pełny tekst źródłaThis 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
Di, Palma Luca. "Antennes réseaux transmetteur reconfigurables aux fréquences millimétriques". Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S092/document.
Pełny tekst źródłaSeveral civil and military applications (hertzian beams, satellite communications, automotive radars, high resolution imaging systems) require antennas with reconfigurable beam capabilities (beam-scanning, beamshaping, multiple beam generation). Transmitarray antennas are good candidates and represent an alternative to classical phased arrays or reflect-arrays for these applications. The main objective of this thesis is to demonstrate the feasibility of reconfigurable transmitarrays fabricated with standard technologies in Ka-band (20-30 GHz). Different unit-cell designs based on p-i-n diodes have been developed to work in linear and circular polarization. Their optimization and experimental characterization have been performed. Waveguide measurements show insertion losses of 1.09 dB at 29.0 GHz with a 3-dB bandwidth of 14.7%. A hybrid simulation technique has been developed in order to analyze efficiently large transmitarrays in which the sequential rotation technique has been applied to optimize the polarization quality and the radiation patterns. A 400-elements transmitarray operating in circular polarization has been realized and tested in anechoic chamber. A beam-scanning angular coverage of ±60° and circular polarization selection (left/right) have been demonstrated
Verdy, Matthieu. "Développement de stratégies de test pour les systèmes de communications millimétriques". Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT078/document.
Pełny tekst źródłaThe thesis' goal is to develop global test strategy in order to reduce test cost and ensure total test cover. OFDM millimeter communications will a point of interest in this thesis. The investigation has to reach the circuit BIST implementation to release constraint over test environment. The test environment contains ATE and test interface. Our approach consists in using a standard ATE and implementing few components on test interface. BIST specification and modules of test interface must be precise and realistic in order to ensure the physical implementation. To reach these goal, we will first rely on models of different blocks and appropriate simulations to identify relevant test parameters. Secondly, we will produce test solution that ensure the measure of each relevant parameters. Relevant test parameters are parameters that allow to test the system quickly, wih maximal test cover. These parameters can be computed using both functional model and structural model. Functional model is used to detect catastrophic faults, and structural model determines each blocks performance to improve efficiency. Dealing with structural test, individual block performances can be determined using BIST, or computing correlation between local blocks parameters and global system parameters (ie. EVM, or any relevant parameter)
Benzaim, Oussama. "Techniques multi-port pour la conception et la réalisation de systèmes micro-ondes dédiés à l'évaluation non destructive de matériaux". Thesis, Lille 1, 2009. http://www.theses.fr/2009LIL10031/document.
Pełny tekst źródłaNon Destructive microwave Testing (NDT) consists in examining a material so that after testing, its future use is not affected. Such characterization is usually achieved through the measurement of reflection and/or transmission properties of the material under test by a vector network analyzer. However, this type of equipment is oversized in terms of measurements abilities and cost for a use outside the laboratory. In order to overcome this limitation, we have developed, with a view to low cost, systems based on the six-port technique. In particular, a dual four-port reflectometer is developed for the measurement of reflection and transmission parameters of passive devices in the frequency range of 55 - 65 GHz. In addition, we have proposed complete solution which integrates hardware and software resources allowing the development of specialized systems in the field of microwave characterization. The added software solutions, based on artificial neural networks contribute to satisfy the needs of a non-destructive, quantitative evaluation. Finally, in order to perform characterization of defects whose dimensions are smaller than the wavelength, a mm-wave microscope formed by the mm-wave system and associated with an evanescent wave probe has been proposed. This ensemble reveals changes in magnitude and phase reflection coefficients of the material under test, allowing non-contact measurements. ___________________________________________________________________________
Sarimin, Nuraishah. "Transmitter design in the 60 GHz frequency band". Electronic Thesis or Diss., Paris 6, 2017. http://www.theses.fr/2017PA066638.
Pełny tekst źródłaWith the proliferation of portable and mobile electronic devices, there is a strong need to exchange data quickly and conveniently between devices encouraging to overcome challenges in bandwidth shortages and congestion in the lower frequencies spectrum. Millimeter-wave (Mm-wave) technology is considered as one of the future key technologies to enable high data rates wireless applications due to its large abundant spectrum. Advanced CMOS technology nodes comes with high ft and fmax, enable low cost and widespread use of this spectrum. However, many associated challenges ranging from device, circuit and system perspectives for the implementation of a highly integrated mm-wave transceiver especially the power amplifier (PA) which identified to be the most challenging RF block to be designed. The system level concept of low power architecture is firstly studied and key blocks such as 60 GHz antenna and OOK modulateur in 130nm CMOS technology were presented. This thesis also explores the design challenges of mm-wave power amplifier in 28nm UTBB-FDSOI technology. Three different designs of 60 GHz power amplifier were demonstrated in 28nm LVT FDSOI : 1) A two-stage cascode PA, 2) A two-stage differential PA with low-km TMN, 3) A power combined two-stage differential PA with low-km TMN. The simulated performance including the consideration of key layout parasitics were presented. Future work will include for on-chip integration with the PA
El, Makoudi Ikram. "Étude et fabrication de transistors à enrichissement de la filière InAlAs/InGaAs pour applications millimétriques faible bruit". Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10069/document.
Pełny tekst źródłaThe increasing needs of high frequency electronic systems combined with constant efforts in miniaturization require low noise and high frequency Field Effect Transistor with high operation voltage. For digital applications, enhancement mode HEMT is needed. The enhancement-mode metamorphic AlInAs/GaInAs HEMT on GaAs substrate developed in OMMIC in 2007 meet these requirements and it represents the starting point of our study. The aim of our work is to provide AlInAs/InGaAs E-HEMTs for low noise applications, on InP substrate in order to take advantage of its high electronic mobility, while maintaining high static and dynamic performances. We first optimized the structure, then we realized and characterized E-HEMTs which reach high cutoff frequencies, such as 204 GHz for FT and 327 GHz for FMAX, combined with a low noise figure of 0.96 dB and an associated gain of 13.2 dB at 30 GHz. These structures also show high static performances such as a 30 mV threshold voltage, a gate-to-drain breakdown voltage of –7 V, and a high transconductance of 1040 mS/mm. These results make this pseudomorphic E-HEMT on InP substrate at the state of the art of the enhancement mode HEMTs, and it even competes with the best low noise applications depletion mode HEMTs
Fuscaldo, Walter. "Advanced radiating systems based on leaky waves and nondiffracting waves". Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S015/document.
Pełny tekst źródłaIn recent years, microwave, millimeter-wave, and THz applications such as medical and security imaging, wireless power transfer, and near-field focusing, just to mention but a few, have gained much attention in the area of ICT due to their potentially high social impact. On one hand, the need of highly-directive THz sensors with tunable radiating features in the far-field region has recently boosted the research activity in the design of flexible, low-cost and low-profile devices. On the other hand, it is of paramount importance to focus energy in the near-field region, and thus the generation of limited-diffraction waves in the microwave and millimeter-wave regime is a topic of recent increasing interest. In this context, leaky-wave theory is an elegant and extremely useful formalism which allows for describing in a common fashion guiding and radiating phenomena in both the near field and the far field, spanning frequencies from microwaves to optics passing through THz. In this PhD thesis we aim to exploit the intrinsic versatility of the leakywave approach to design advanced radiating systems for controlling the far-field radiating features at THz frequencies and for focusing electromagnetic radiation in the near field at millimeter waves. Specifically, the use of relatively new materials such as graphene and liquid crystals has been considered for the design of leaky-wave based radiators, achieving very promising results in terms of reconfigurability, efficiency, and radiating capabilities. In this context, an original theoretical analysis has provided new general formulas for the evaluation of the radiating features (e.g., half-power beamwidth, sidelobe level, etc.) of leaky-wave antennas. Indeed, the current formulations are based on several simplifying hypotheses which do not allow for an accurate evaluation of the beamwidth in different situations. In addition to the intriguing reconfigurable capabilities offered by leaky waves in far-field applications, interesting focusing capabilities can be obtained in the near field. In particular, it is shown that leaky waves can profitably be used to generate limited-diffraction Bessel beams by means of narrow-band radiators in the microwave range. Also, the use of higherorder leaky-wave modes allows for achieving almost the same performance in the millimeter-wave range, where previous designs were subjected to severe fabrication issues. Even more interestingly, the limited-diffractive character of Bessel beams can also be used to generate limited-diffraction pulses as superpositions of monochromatic Bessel beams over a considerable fractional bandwidth. In this context, a novel theoretical framework has been developed to understand the practical limitations to efficiently generate limited-diffraction, limited-dispersion pulses, such as X-waves, in the microwave/millimeter-wave range. As a result of this investigation, a class of wideband radiators has been thoroughly analyzed, showing promising capabilities for the generation of both zeroth-order and higher-order Xwaves. The latter may pave the way for the first localized transmission of orbital angular momentum in the microwave range
Parment, 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
Acri, Giuseppe. "Sensibilité à la technologie et accordabilité des matrices de Butler en guide intégré dans le substrat, déclinées sur substrat PCB à 28 GHz et sur interposer above-IC benzocyclobutène aux fréquences millimétriques". Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT019.
Pełny tekst źródłaNetworking technologies have become increasingly omnipresent over the past two decades. In particular, 5G (fifth generation) is expected to support significantly faster mobile broad-band speeds, lower latencies and hundreds of times more capacity than current 4G (fourth generation) while also enabling the full potential of the Internet of Things. Specifically, the underemployed spectrum in the millimeter-wave (mm-wave) frequency bands (30-300 GHz) might be seen as a potentially profitable solution for achieving the aforementioned goals. In such a context, the switched-beam antenna (SBA) systems have become of great interest because they can achieve high spectral efficiency and increase the capacity of wireless communication systems. More specifically, Butler matrix (BM) is one of the most important multiple beam forming networks, which has been intensively explored and extensively em-ployed in communication systems due to its unique properties as perfect matching, isolation, and equal power division, that can be obtained at the same time.The work achieved in this PhD thesis was focused on the conception of a Butler matrix, for mm-wave applications in SIW topology. Two frequency bands were mainly addressed for that purpose. The first one is the band around 28 GHz, that is suited for 5G, where an ex-tended beam agility concept was introduced for 4ⅹ4 Butler matrix, in PCB-SIW technology, to achieve a better spatial resolution, as compared to a 4ⅹ4 conventional system. The second one is the WR10 band (75 GHz-110 GHz), as well as some extra-bands beyond, for which the use of intermediate packaging platforms, so-called interposers, allow the frequency ris-ing as compared to the conventional PCB technologies. In both, the proposed structures were detailed, theoretical analyses were developed, and simulation and measurement works were carried out, with retro-simulations when needed, which permitted to validate the proposed concepts. One of the main goals of this manuscript is to enhance the spatial antenna cover-age and the performance of the beam forming system as compared to its conventional coun-terpart while keeping almost unchanged the surface (reduced costs and design complexity). Another goal is to study the sensitivity of the system, so that the weak points of the BM are revealed.In the first chapter of this thesis, BM solutions for RF and mm-Wave circuits were present-ed, and beam-steering enhanced ability BMs was detailed. In the second chapter, attention focuses on a detailed sensitivity BM study based on a Monte Carlo approach and a proposed solution for extended beam Butler matrices well suited to SIW technology. In the third chap-ter, the pros and cons of continuous and digital phase shifting are discussed and a 28-GHz ,1-bit, SIW, phase shifter using PIN diodes, is designed and tested as a solution to be used in the extended beam matrix. In the fourth chapter, the design blocks for 28 GHz SIW Butler matrix were introduced and measured, along with the entire BM measurements. In the fifth chapter, benzocyclobutene (BCB) SIW useful for Butler matrix blocks were designed and measured in WR10 and WR5 bands, which show the very interesting performance of such an interposer. Even coupler and crossover were fabricated and measured in WR10 band. As a prospect, the extended beam agility BM concept could be implemented in BCB interposer or other kind of interposers as metallic nanowire membranes (MnM) for sub-THz applications, to test the feasibility
Delage, Anthony. "Technologie aérosol appliquée à l'intégration 3D et aux composants hyperfréquences". Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0113.
Pełny tekst źródłaThis 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
Sourikopoulos, Ilias. "Techniques de traitement numérique en temps continu appliquées à l'égalisation de canal pour communications millimétriques à faible consommation". Thesis, Lille 1, 2015. http://www.theses.fr/2015LIL10189/document.
Pełny tekst źródłaReceivers for 60GHz wireless communications have been profiting from innovation in wired links in order to meet a power budget that will enable integration in next‐generation high-speed portable wireless terminals. Mixed‐signal implementations of the Decision Feedback Equalizer (DFE) have been proposed to alleviate overall system consumption. In this thesis, power minimization is pursued by removing the clock from the feedback path of the DFE. Inspired by recent developments in Continuous‐Time Digital Signal Processing, a continuous‐time digital delay line is used. The design aims at mitigating wireless channel impairments caused by signal reflections in typical Line‐of‐Sight, indoors deployment conditions. The system is shown theoretically to achieve channel‐dependent power consumption within acceptable Bit Error Rate performance for decoding. Moreover, a programmable digital delay element is proposed as the granular element of the delay line that exploits body biasing to achieve a coarse/fine functionality. Prototype DFE and delay lines have been fabricated and characterized in 28nm Fully Depleted Silicon Over Insulator technology (FDSOI)
Debroucke, Romain. "Développements de capacités variables en technologie silicium pour les applications RF et mmW". Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10135.
Pełny tekst źródłaMultiplication of standards and communication protocols allows nowadays a wider range of services for each consumer. If this multiplication of standards is more significant for users, it creates an increased complexity of Rx/Tx communication modules both in RF (3G, 4G), or mmW (W-HDMI, imaging, radar, sensors ) range. These systems Rx/Tx must be able nowadays to support multiple frequency bands (tri-band mobilephone as an example), or agile functions generation, it is called reconfigurable systems. In this context, that this thesis work taking place which aims to address the challenge of high performances tunable capacitances development in RF and mmW range. The first chapter entitled "Emergence of the need for high performances non linear capacitances in silicon technology" identifies the limitations of usual tunable capacitances offer at STMicroelectronics. The second chapter " AttoFarad capacitance characterization: The Challenge of high impedance measurement" discuss the problem of characterization of very small capacity, called attoFarad, used mainly in digital controlled oscillator (DCO). Nowadays these aF capacitance are very difficult to modelize regarding problems of standard measurement methods. We will discuss of a new method for high frequency characteriziation with a relative precision of 50aF 1 to 10GHz. The third chapter entitled "From analog to digital, developments of tunable capacitances up to millimeter frequencies in CMOS and BiCMOS technologies," will focus on figures of merit improvements of the capacitance (tuning ration, resonant frequency, linear law...) through optimization of existing solution (MOS varactor) and the design of new digital architectures. The final chapter "Performances evaluation through referent mmW circuits " exhibit, the design, realization and characterization of two agile functions, a phase shifter and a in-situ tuner, both in the mmW range. To conclude, all these thesis work provide new solutions for the design of RF and mmW circuits. They have extended the tunable capacitances offer at STMicroelectronics in advanced technologie nodes but also to investigate and validate a new concept of characterization necessary for all of these developments
Shehata, Mohamed. "Hybrid Analogue and digital techniques applied to massive MIMO systems for 5G transmission at millimeter waves". Thesis, Rennes, INSA, 2019. http://www.theses.fr/2019ISAR0026.
Pełny tekst źródłaThe main aim of this work is to analytically analyze the performance of Hybrid Beamforming (HBF) in Millimeter Wave (mmWave) massive Multiple Input Multiple Output (MIMO) systems, to develop low complexity HBF algorithms to adapt with such systems and finally to verify the practical validity of these algorithms. The massive MIMO antenna array provides high transmit gain overcoming the severe path-loss limitation of the mm Wave systems. On the other had applying HBF in sparse channels achieves close Spectral Efficiency (SE) perfonnance compared to the full digital beamforming, however with lower hardware cost and power consumption. In this thesis we start by defining the conditions for which bath the HBF and full digital beamfonning can achieve exactly similar SE performance. Then, we analyze the SE perfonnance gap that arise between them in sparse mmWave MIMO channels. Moreover, we provide closed form SE models for basic analog and HBF techniques in typical mmWave MIMO channels. Later we consider a Multi User (MU) massive MIMO HBF framework that considers multiple spatial signal processing techniques for the analog domain processing, digital domain processing, power allocation and users scheduling. We develop low complexity algorithms for such framework in order to provide a low complexity practical HBF framework for future wireless communication networks that can cope with the challenges of mm Wave channels
Altuntas, Philippe. "Fabrication et caractérisation de dispositifs de type HEMT de la filière GaN pour des applications de puissance hyperfréquence". Thesis, Lille 1, 2015. http://www.theses.fr/2015LIL10131/document.
Pełny tekst źródłaGallium Nitride (GaN) based High Electron Mobility Transistors (HEMTs) have emerged as the best candidate for high temperature, high voltage and high power operation in millimeter-wave range. The unique combination of high breakdown field, high electron velocity, and large sheet electron densities of III-N material permits outstanding performance. The work was performed within IEMN laboratory in Microwave Power Devices group. It relates the fabrication and the characterization of GaN HEMT devices for microwave power applications. The first part exposes the physical and electrical properties of gallium nitride as well as a review concerning the state of the art in terms of output power density related to GaN HEMTs. The second chapter deals with the technological processes with a particular attention on the process optimization regarding the ohmic contact and the T-gate technology. Despite outstanding properties, the HEMT performance remains inherently limited by physical and electrical parasitic phenomena. Thus, the third chapter presents the whole studies performed in other to understand these limitation effects (losses, traps, thermal effect). In the last chapter DC, RF, pulsed and large signal measurements are reported for HEMTs based on different heterostructures. In particular, the capability of AlGaN/GaN transistors on Si(111) substrate grown by MBE is demonstrated for high frequency microwave power applications at 40GHz with a continuous wave output power density of 2.7W/mm associated with a power added efficiency of 12.5% and a linear gain of 6.5dB corresponding to the highest saturated power density ever reported on Si(111) substrate to date
Agboton, Alain. "Études théorique et expérimentale de dispositifs à hétérojonction AL(Ga, In)N/GaN pour des applications de puissances en bande Q (40.5 - 43.5GHz)". Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10047/document.
Pełny tekst źródłaThis PhD work consisted in a theoretical and experimental study of Al(In, Ga)N/GaN HEMTs (High Electron Mobility Transistor). It was carried out in Microwave Power Devices group at IEMN (Institut d’électronique de Microélectronique et de Nanotechnologie). The manuscript is shared in four chapters: The first chapter deals with the main physical properties of nitride materials. It presents the main specificities of Al(In,Ga)N/GaN HEMTs and exposes through the state of art, their performance in terms of microwave power. The second part describes Schottky and Ohmic contacts analysis based in particular to cryogenic temperatures measurement in order to identify the different conduction modes occurring within. In the third chapters, we studied static and microwave characteristics of Al(In,Ga)N/GaN HEMTs manufactured for the purposes of this thesis. They are used to examine the frequency performance of these transistors through an original study based on transit time. And finally, the last chapter explains the effects of traps interfaces that constitute one of the fundamental limitations inherent to this type of components. They are characterized and quantified by several defects spectroscopy methods such as subthreshold slope method, conductance method, high frequency - low frequency method
Maazi, Mostafa. "Conception et réalisation de systèmes en gamme millimétrique pour l'évaluation non destructive : application à la restauration de profils et d'images d'objets enfouis". Lille 1, 2005. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2005/50376-2005-9.pdf.
Pełny tekst źródłaBicais, Simon. "Design of the Physical Layer for Future Sub-TeraHertz Communication Systems". Thesis, Université Grenoble Alpes, 2020. https://tel.archives-ouvertes.fr/tel-03155951.
Pełny tekst źródłaTo deploy high-rate wireless services, future communication networks envisage the use of wide frequency bands. Still, the usual frequency bands in the sub-$6$ GHz spectrum are extremely limited and expensive. To expand its available spectrum, the forthcoming generation of mobile networks with 5G initiates the use of higher frequencies through the exploitation of millimeter-wave bands. In this search for frequency resources, the sub-THz spectrum from $90$ to $300$ GHz offers unprecedentedly large available bands, several tens of GHz. Wireless communications in sub-THz frequencies are therefore seen as a foremost solution to achieve Tbit/s data rates and meet the requirements of future wireless connectivity. Nevertheless, existing and mature wireless technologies cannot be directly transposed to the sub-THz bands as they do not consider the specific features of sub-THz communications. Additional research is hence required to design efficient communication systems adapted to the constraints of sub-THz frequencies. Some of the major technological challenges brought by using high carrier frequencies and large bandwidths include: the performance limitations caused by the strong phase impairments of high-frequency oscillators; and the problem of high sampling rates required by the analog-to-digital conversion. In this thesis, the conducted research focuses on the development of the physical layer for sub-THz communication systems and attempts to overcome these technological barriers. Our objective is twofold: to increase the communication data rate and to relax the constraints on radio-frequency architectures. To do so, our approach consists in jointly designing signal processing for the analog and digital domains.The two main contributions of this work are: the optimization of coherent transceivers for strong phase noise channels; and the proposal of dedicated communication systems with non-coherent and high-rate architectures. First, we have proposed optimized transmission schemes for strong phase noise channels including: the modulation, the demodulation, and the link adaptation. The proposed solutions achieve high spectral efficiency communications with relaxed constraints on radio-frequency oscillators. Our results show that the use of optimized transmission schemes greatly contributes to mitigate the impact of phase noise on coherent transceivers. Consequently, our work describes valuable technical solutions to the development of physical layers with high spectral efficiency for the sub-THz spectrum. Second, we have also targeted low-complexity physical layers readily implementable in sub-THz frequencies. We have studied the design of communication systems specifically dedicated to the sub-THz bands using non-coherent architectures. In order to implement high-rate communications with non-coherent architectures, we have considered the use of spatial multiplexing and wide frequency bands. Our work on spatial multiplexing in sub-THz frequencies demonstrates that high-rate communications can be implemented with low complexity and low power architectures using multi-antenna systems and energy detection receivers. Besides, the use of wide bands strongly constrains the analog-to-digital conversion. In order to reduce the required sampling frequencies of converters and to simplify practical implementations, we have proposed a new receiver for high-rate impulse radio systems. We have shown that the proposed receiver architecture, using parallel projections of the received signal in the analog domain, leads to near-optimal performance with significantly reduced sampling frequencies
Sarimin, Nuraishah. "Transmitter design in the 60 GHz frequency band". Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066638.
Pełny tekst źródłaWith the proliferation of portable and mobile electronic devices, there is a strong need to exchange data quickly and conveniently between devices encouraging to overcome challenges in bandwidth shortages and congestion in the lower frequencies spectrum. Millimeter-wave (Mm-wave) technology is considered as one of the future key technologies to enable high data rates wireless applications due to its large abundant spectrum. Advanced CMOS technology nodes comes with high ft and fmax, enable low cost and widespread use of this spectrum. However, many associated challenges ranging from device, circuit and system perspectives for the implementation of a highly integrated mm-wave transceiver especially the power amplifier (PA) which identified to be the most challenging RF block to be designed. The system level concept of low power architecture is firstly studied and key blocks such as 60 GHz antenna and OOK modulateur in 130nm CMOS technology were presented. This thesis also explores the design challenges of mm-wave power amplifier in 28nm UTBB-FDSOI technology. Three different designs of 60 GHz power amplifier were demonstrated in 28nm LVT FDSOI : 1) A two-stage cascode PA, 2) A two-stage differential PA with low-km TMN, 3) A power combined two-stage differential PA with low-km TMN. The simulated performance including the consideration of key layout parasitics were presented. Future work will include for on-chip integration with the PA
Devulder, Marie. "Étude et faisabilité d'un système ultra large bande (ULB) en gamme millimétrique en technologie silicium avancée". Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10149/document.
Pełny tekst źródłaOver the past few years, consumer wireless communication systems have been implemented using silicon technology (BiCMOS, CMOS). Thanks to the higher operating frequency range of its active components (MOSFET, Heterojunction Bipolar Transistors), silicon technologies have replaced Ill-V technology in wireless communication circuits. Ultra Wideband technologies, used for high power military radars, were recently extended to consumer applications and normalized over the frequency range from 3 to 10 GHz in the United States of America. Within this range, receiver and transmitter architectures are complex. Transposition of a baseband UWB signal at 60 GHz, more precisely the 59-62 GHz band, offers many advantages, such as a simpler system architecture and a reduced die area. SiGe BiCMOS 0.13 µm silicon transistors exhibit a cut-off frequency and a maximum oscillation frequency of 160 GHz. We have designed and measured all the different millimeter circuits of the transceiver such as the oscillator, switch, pulse generator, medium power amplifier, low noise amplifier and detector. The results obtained on these blocks are in agreement with the system specifications we had established. A fully integrated transmitter and a fully integrated receiver circuits were designed and realized. The results demonstrate the capability of silicon technologies for the implementation of new communication systems in the millimeter wave range
Crunelle, Romain. "Etude, conception et réalisation de transitions verticales coaxiales pour une intégration hétérogène 3D de microsystèmes en gamme millimétrique". Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10170/document.
Pełny tekst źródłaAchieving predictable limits of Moore's Law over the next ten years, communication systems designers try to integrate a maximum of functionality into smaller and smaller 3D modules, including sensors, embedded intelligence, radio modules with their antenna (Approach More than Moore). So we go from the concept of SoC (System-on-Chip) to the concept of SiP (System-in-Package) that can integrate SoC but offering more features concerning the environmental perception, communication, reconfigurability and the possibility of self-organization in ad-hoc network, while minimizing the volume and energy consumption. This thesis was performed in this context and presents this heterogeneous integration technology (System-in-Package), miniature, low cost RF MEMS, combining MMIC circuits and smart antennas to establish communications in millimeter range. For this, by SIPCOM project, we propose the realization of an ultra compact radio module and efficient testing in millimeter range thank to “heterogeneous integration” approach. This module will integrate all the functions necessary for the implementation of a 60 GHz transmitter: network antennas, phase shifters based on MEMS to ensure the agility of the beam, the DC / DC converter to power the MEMS, an FPGA (trade) to control the reconfigurability of the radio module and circuit standby / alarm module for minimum consumption. In this context, the thesis aims to develop technology in packaging and interconnexions and vertical transitions.In this manuscript, we propose a new approach to vertical transitions, the TSCV (Through Silicon Coaxial Vias).Vertical transition based on the coaxial model, using benzocyclobutène (BCB) as a dielectric material, the study, development, and evolution of the structure are presented. Because of its nature, this coaxial transition offers all the advantages in packaging with high integration density, with a total electromagnetic isolation from the substrate, and thus completely independent of the nature of the substrate, an ultra low parasitic electromagnetic radiation, and by properties of the BCB, ultra low electromagnetic losses in the millimeter band. We also detail the process e technological achievement and its evolution, allowing the manufacture and testing of these structures
Gorisse, Jean. "Regulation of power amplifiers under VSWR conditions in CMOS 65nm for 60GHz WLAN applications". Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2010. http://tel.archives-ouvertes.fr/tel-00563235.
Pełny tekst źródłaTagro, Yoann. "Mise au point d’une méthodologie de caractérisation des 4 paramètres de bruit HF des technologies CMOS et HBT avancées dans la bande 60-110 GHz : développement de système à impédance variable in-situ". Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10123/document.
Pełny tekst źródłaThe advanced technologies following the gate length scaling in agreement with Moore’s law allow today to get high performances of silicon transistors (ft/fMax > 150 GHz). The knowledge of the silicon transistors’ dynamic and noise performances in millimeter wave range is mandatory but they characterization is difficult due to the limitation of measurement tools. In this thesis we establish in a first step a state of the art of existing impedance tune. This study is followed by the design and the characterization of integrated impedance tuners in order to avoid the insertion losses induced by the passive devices between mechanical tuner and transistors under test in classical setup. We have described the BEOL, the different integrated tuner’s components, and defined a common tuner’s architecture for both technologies (CMOS 65 nm and BiCMOS9MW). The tuner measures presented performances (TOS of 7:1 and 150:1) better than mechanical ones. The noise characterization methods are presented with particular focus on the multi impedance method that we have used in cold-noise source. We conclude by the extraction of the 4 noise parameters of the MOSFET and HBT transistors, using designed integrated tuners. The obtained noise performances in millimeter wave range are respectively around 2 dB (MOSFET) and 3.5 dB (HBT) and are in agreement with the used models. The possibility to address a broad band of applications with these tuners is also presented, such as load-pull applications, G band integrated tuner, variable gain amplifier
Stephane, Ginestar. "Realisation et caractérisation d'un laser DFB bi-mode pour application radio sur fibre". Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2009. http://tel.archives-ouvertes.fr/tel-00464156.
Pełny tekst źródłaGinestar, Stéphane. "Réalisation et caractérisation d’un laser DFB bi-mode pour applications radio sur fibre". Thesis, Lille 1, 2009. http://www.theses.fr/2009LIL10092/document.
Pełny tekst źródłaGeneration of microwave, millimetre-wave even THz signals by optical means is currently a favoured technique for a lot of system applications such as: high bit-rate wireless telecommunications, local oscillator or radar signal distribution within satellites, video signal distribution, automotive communications, THz security systems, etc… We report here the fabrication and the characterization of an ultra-compact optical source made of semiconductor material. It allows generating two optical modes that are separated by the frequency that is requested at the photodetector level. This source is composed of two DFB lasers constituting a dual-mode laser emitting in the 1.55µm wavelength range. The device has been fabricated at Alcatel-Thales III-VLab using a proprietary DFB technology and the work has been supported under the "IPHOBAC" European project. Several targets were fixed for this device: tunability of intermodal spacing up to 300GHz, optical linewidth close to the MHz as well as horizontal and vertical divergences around 10°. The first goal has been achieved by using two DFB structures with a 0.3nm difference in the grating pitch and tuning the drive current of each section. The second goal has been globally achieved by using a quantum well based active layer. A new version including quantum dot based active layer should answer positively to this target. Last objective was partially obtained by the design and the integration of a spot size converter. The divergence has been measured as 10°x17° (HxV). Concerning the vertical divergence, the target of 10° was not obtained mainly linked to the device structure and the limitations we fixed on the overall length of the device
Kyllonen, Jaakko. "Design of frequency agile filter and mmWave antenna for 5G mobile devices". Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0117.
Pełny tekst źródłaMobile communications are in constant race to meet the demands of the users, especially in the terms of the amount of data they want to use. The introduction of the 5G NR (New Radio) will exceed the current limits but it needs technological breakthroughs to achieve its goals. To achieve the promises of the new 5G NR communication standard the electronics industry is interested in to develop new key components for tomorrow. The objective of this thesis work has been to design two key components to respond to the different future developments of the mobile devices. Therefore a frequency agile filter for frequencies below 6 GHz and a low cost antenna array around 28 GHz for 5G NR have been designed, manufactured and tested