Teses / dissertações sobre o tema "Design millimétrique"
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Lançon, Léo. "Définition et implémentation d’un récepteur à base de transformateur pour un radar à 140 GHz pour applications automobiles". Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0462.
Texto completo da fonteThe constant increase in the number of sensors in modern cars, fulfilling advanced driving assistancefunctions, places the automotive radar as an essential element in today’s and tomorrow’svehicle. This tendency is motivated in the long term by the development of autonomous vehicles.The industry considers moving the automotive radar product from the current standard around80 GHz to a new frequency band around 140 GHz. This increase in the operation frequency wouldenable more compact sensors while maintaining and even improving the sensor accuracy thanksto MIMO applications. This work aims to assess the feasibility of a radar receiver at 140 GHz.A first part of this work is dedicated to the development of design tools and models which facilitatethe implementation of millimeter wave circuits. First, a design methodology for impedancematching networks based on integrated transformers is presented. Thanks to their numerousadvantages in addition to their impedance matching capability, they will be used in all thefollowing development of this work. Then, a complete model of the multi-harmonic behaviorof passive N-path circuits and more particularly N-path mixers is proposed. Their benefits interm of noise, current consumption and linearity make them suitable for the implementation of140 GHz automotive radars.A second part of this work is focused on the implementation of multiples RF front-ends forradar receivers, based on a mixer-first architecture. Two solutions are first proposed which fullyexploit the advantages of the modeled mixers at the considered frequency. A fundamental solutionis proposed which complies with the long-range radar applications. A sub-harmonic alternativewith a slightly reduced range is then presented. It would enable significant savings on the chiparea and the current consumption, answering to a market demand for low-cost radar productsthat can be embedded in large number inside one vehicle.Finally, a novel type of passive mixers, called bottom-plate mixer is studied to design twoadditional radar receivers front-ends. These mixers keep the advantages of the traditional N-pathmixers while also presenting a high voltage gain. A fundamental receiver is proposed, based onan existing topology at RF frequencies only, that addresses the constraints for the 140 GHz radarapplication. A second sub-harmonic receiver is designed with a novel topology developed in thiswork, which complement the first receiver. These two front-ends allows a longer detection rangefor the radar module
Attwood, Nicholas. "Design of a mmWave channel sounder and channel model extraction in railway environment". Electronic Thesis or Diss., Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2024. http://www.theses.fr/2024IMTA0449.
Texto completo da fonteThe world of transportation is currently experiencing a revolution towards complete automation. However, this automation depends on the creation of new communication systems with high data rates and low latency. Thanks to the development of 5G, new scenarios such as vehicle-to-vehicle communication or communication between vehicles and the rest of the infrastructure have become possible. The same applies to more complex environments, such as the railway sector, where a transformation in communication systems is underway with the study of a new communication standard, FRMCS. However, to achieve such systems, a deep understanding of the behavior of the radio propagation channel is essential. To meet this need, at IMT Atlantique, a channel sounder has been developed, allowing long-term measurements for dynamic scenarios in vehicular environments. This sounder has been installed in various environments to be tested under in situ conditions before being used in a measurement campaign in the railway sector. From these measurements, large and small-scale parameters are calculated for different environments, following a scenario similar to the architecture proposed by 3GPP. Finally, these results are discussed and compared with the models provided by the same 3GPP
Margalef, rovira Marc. "Design of mm-wave Reflection-Type Phase Shifters with Oscillation-Based Test capabilities". Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT025.
Texto completo da fonteThis work focuses on the design of on-silicon mm-wave Reflection-Type Phase Shifters (RTPS) with Oscillation-Based Test (OBT) capabilities. For more consistency, a single technology was considered, the STM 55-nm BiCMOS. First, the theory and practical implementations of 3-dB couplers is discussed. Particular attention is brought to the Coupled Slow-wave CoPlanar Waveguide (CS-CPW) topology, due to its good performance. Using this topology, the measurements of two 3-dB couplers are reported: (i) a 120-GHz, and (ii) a 185-GHz coupler.Next, the existing topologies of integrated varactors are discussed. Measurement results are reported for an Inversion-mode MOS (I-MOS) varactor from 1 up to 325 GHz. Additionally, the Common-Source MOS (CS-MOS) varactor architecture is proposed and measurement results from 1 to 145 GHz for this architecture are reported.Then, the theory of RTPS is presented and CS-CPW-based couplers together with Accumulation-mode MOS (A-MOS), I-MOS and CS-MOS varactors are used for the design of four RTPS. The measurement and simulation results of these RTPS, with central frequencies ranging from 60 to 200 GHz, are presented.Subsequently, the theory and measurement results of the OBT on an integrated 60-GHz RTPS are discussed.Finally, a mm-wave TRL calibration compaction technique is described using machine-learning tools
Bouchoucha, Mohamed Khalil. "Méthode de conception basée sur le coefficient d’inversion pour l’optimisation énergétiques des circuits RF et millimétrique, en technologie 28 nm FD-SOI CMOS". Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALT026.
Texto completo da fonteIn response to the flourishing market demands for the new generation of IoT devices, thiswork addresses the design and optimization of Low Noise Amplifiers (LNAs). The LNAsserves as the main building block of low-power LNA-first sub-6GHz receivers dedicated to5G Long-Term Evolution for machines (LTE-M) and Narrowband IoT (NB-IoT) cellularstandards. Recognizing the escalating challenges in ultra-low power IoT device connectivity, the significance of optimizing LNAs lies in enhancing overall receiver performanceand meeting the strict low noise and reduced power budget requirements of LTE-M andNB-IoT applications. Besides, it requires the utilization of cost-efficient, high-performing,and extensively integrated technology for Very Large Scale Integration. In this thesis, weemploy the 28 nm FD-SOI CMOS technology provided by STMicroelectronics.To improve power efficiency, the LNA is designed using a comprehensive analyticalmethodology. This methodology leverages the transistor inversion level as a key designparameter, providing insights into the design space. Employing a proposed simple 6-parameter advanced compact model (ACM) introduced in this work, applicable acrossall transistor regions and operation regimes, the methods enable preliminary LNA sizingthrough analytical equations. This simple model, an adaptation of previous ACM versionsaccommodating various physical parameters, is made suitable for both bulk and FD-SOItechnology, incorporating a fourth terminal.The primary contribution lies in the design of a wideband, low-noise sub-6GHz tunable multimode inductorless LNA, utilizing an active gm-boosting Common-Gate (CG)architecture. Tunability is achieved through discrete coarse mode selection and continuous fine-tuning the back-gate of FD-SOI CMOS technology, showcasing the adaptabilityof body-bias for finely tunable architectures, specifically addressing the dynamic demandsof IoT environments.The transistor model, coupled with the analytical LNA description, guides the designalgorithm, exploring various performance trade-offs against the specified requirements.Implemented in STMicroelectronics’ 28 nm FD-SOI CMOS Technology with an activearea of 0.0059 mm2, the measured performance demonstrates over 30 dB voltage gainwith a dynamic range exceeding 20 dB across modes for a frequency range of 400 MHzto 5 GHz. The noise figure (NF) varies from a stringent value of 1.8 dB to 7 dB, while the Input-referred third-order Intercept Point (IIP3) spans from -24.5 dBm to -6.5 dBmbased on the selected mode. The maximum power consumption is 1.86 mW from a 0.9 Vsupply. Fine-tuning the LNA performances across modes achieves extensive coverage ofthe design space.Furthermore, the proposed design methodologies are applied to different LNA architectures, including Resistive feedback common-source, common-gate, and gm-boost common gate LNAs, showcasing the simplicity and applicability of the analytical approach in addressing diverse design scenarios. This paves the way to future energy-efficient implementations targetting ULP ULV IoT receiver front-end solutions
Kyllonen, Jaakko. "Design of frequency agile filter and mmWave antenna for 5G mobile devices". Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0117.
Texto completo da fonteMobile 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
Potier, Clément. "Caractérisation et modélisation des pièges par des mesures de dispersion basse-fréquence dans les technologies HEMT InAIN/GaN pour l'amplification de puissance en gamme millimétrique". Thesis, Limoges, 2016. http://www.theses.fr/2016LIMO0033/document.
Texto completo da fonteNowadays, High Electron Mobility Transistors (HEMTs) in Gallium Nitride (GaN) take the lead in power amplification at microwave frequencies. Most of the studies and developments on those HEMTs concern AlGaN/GaN structures but alternative transistors with an InAlN barrier, which reduces the strain in the crystal lattice of the whole structure, are investigated by few laboratories. This thesis presents some advanced studies on the new InAlN/GaN HEMT developed by the III-V Lab, focusing on the trapping phenomena induced by defects inside the crystal structure. A new method for the characterization of these defects, based on low-frequency S-Parameters measurements, is proposed. Furthermore, a non-linear electro thermal model including trapping effects for an InAlN/GaN HEMT is detailed and used to design a MMIC power amplifier for Ka-band applications
Nguyen, Tran Quang Khai. "Développement de système antennaire pour les communications 5G". Thesis, Université Côte d'Azur, 2020. http://www.theses.fr/2020COAZ4100.
Texto completo da fonteThe 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
Kraemer, Michael. "Design of a low-power 60 GHz transceiver front-end and behavioral modeling and implementation of its key building blocks in 65 nm CMOS". Phd thesis, INSA de Toulouse, 2010. http://tel.archives-ouvertes.fr/tel-00554674.
Texto completo da fonteEl, Ghouli Salim. "UTBB FDSOI mosfet dynamic behavior study and modeling for ultra-low power RF and mm-Wave IC Design". Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAD015/document.
Texto completo da fonteThis research work has been motivated primarily by the significant advantages brought about by the UTBB FDSOI technology to the Low power Analog and RF applications. The main goal is to study the dynamic behavior of the UTBB FDSOI MOSFET in light of the recent technology advances and to propose predictive models and useful recommendations for RF IC design with particular emphasis on Moderate Inversion regime. After a brief review of progress in MOSFET architectures introduced in the semiconductor industry, a state-of-the-art UTBB FDSOI MOSFET modeling status is compiled. The main physical effects involved in the double gate transistor with a 7 nm thick film are reviewed, particularly the back gate impact, using measurements and TCAD. For better insight into the Weak Inversion and Moderate Inversion operations, both the low frequency gm/ID FoM and the proposed high frequency ym/ID FoM are studied and also used in an efficient first-cut analog design. Finally, a high frequency NQS model is developed and compared to DC and S-parameters measurements. The results show excellent agreement across all modes of operation including very low bias conditions and up to 110 GHz
Leite, Bernardo. "Design and modeling of mm-wave integrated transformers in CMOS and BiCMOS technologies". Phd thesis, Université Sciences et Technologies - Bordeaux I, 2011. http://tel.archives-ouvertes.fr/tel-00667744.
Texto completo da fonteSarimin, Nuraishah. "Transmitter design in the 60 GHz frequency band". Electronic Thesis or Diss., Paris 6, 2017. http://www.theses.fr/2017PA066638.
Texto completo da fonteWith 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
De, Sousa Marinho Rafael. "Co-design methodology of 60 GHz filter-L-NA". Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0095.
Texto completo da fonteThis work presents the results and discussions about shared design (co-design)of structures for a RF receptor in millimetric waves. Two structures were mainly studied: TheLNA and the resonator filter. Both structures were developed using novel microelectronic circuitdesign techniques and with the extensive use of CAD software. The circuits were fabricatedusing a0.25μmBiCMOS SiGe:C QuBIC technology from NXP®semiconductors, and themeasurement results are in conformity with the state-of-the-art
Bicais, Simon. "Design of the Physical Layer for Future Sub-TeraHertz Communication Systems". Thesis, Université Grenoble Alpes, 2020. https://tel.archives-ouvertes.fr/tel-03155951.
Texto completo da fonteTo 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
Bordas, Chloé. "Optimisation technologique de commutateurs MEMS RF à tenue en puissance améliorée : application à l'élaboration d'un synthétiseur d'impédance MEMS en bande K". Toulouse 3, 2008. http://thesesups.ups-tlse.fr/238/.
Texto completo da fonteCapacitive RF MicroElectroMechanical System switches present well-known interests in microwave field for a lot of applications (spatial, mobile phone). They may bring tunability to high frequency modules without all the drawbacks of active devices. However numerous problems remain unsolved like dielectric reliability, power handling and fabrication yield which slow down the industrialisation of such components. Efforts have already been done on the design, the dielectric reliability and the technological process. This last-one is not enough improved to obtain functional structures with enhanced performances and reproducibility. The purpose of this thesis work deals with the optimization of the fabrication process of capacitive RF switches with enhanced power handling and their integration in an impedance tuner for K band applications. The first section shows the fabrication process and its principal improvements. Studies on sacrificial layer and releasing method permitted to increase the RF performances and the technological yield. Moreover, new dielectrics have been investigated in order to get better switch life time. The relation between the applied power and the generated temperature is described in the second chapter. Thermal characterizations have been performed to understand the mechanical behaviours under stress. Thanks to infra-red camera, the overheating due to power has been determined. Solutions have been found and studied to absorb or prevent deformations under thermal stress. Finally, all these improvements and studies have been applied to a circuit: an impedance tuner. Its design, fabrication and characterization constitute the final chapter of this manuscript
Sarimin, Nuraishah. "Transmitter design in the 60 GHz frequency band". Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066638.
Texto completo da fonteWith 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
Demirel, Nejdat. "Co-design d'un bloc PA-Antenne en technologie silicium pour application radar 80 GHz". Phd thesis, Université Sciences et Technologies - Bordeaux I, 2010. http://tel.archives-ouvertes.fr/tel-00586071.
Texto completo da fonteTorres, Florent. "Power amplifier design for 5G applications in 28nm FD-SOI technology". Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0064/document.
Texto completo da fonteThe 5G future mobile network is planned to be deployed from 2020, in a context of exponential mobile market and exchanged data volume evolution. The 5G will leverage revolutionary applications for the advent of the connected world. For this purpose, several network specifications are expected notably low latency, reduced power consumption and high data-rates even if no standard is yet defined. The frequency bands traditionally used for mobile networks will not permit the needed performances and several mmW frequency bands are under study to create a complementary frequency spectrum. However, these mmW frequency bands suffer from large attenuation inbuilding material and in free-space. Therefore, several techniques will be implemented to tackle these limitations indense urban areas like backhauling, FD-MIMO and beamforming phased array. This is leading to a large number of transceivers for base stations and end-user devices. CMOS technology offers undeniable advantages for this mass market while FD-SOI technology offers additional features and performances. The power amplifier is the most critical block to design in a transceiver and is also the most power consuming. To address the 5G challenges, several specifications concerning power consumption, linearity and efficiency are expected. The environment variations inbeamforming phased array and the industrial context drive the need for robust topologies while power amplifier reconfigurability is benefic in a context of adaptive circuits. This thesis addresses these challenges by exploring the conception of a robust and reconfigurable power amplifier targeting 5G applications while integrating specific design techniques and taking advantage of 28nm FD-SOI CMOS technology features for reconfigurability purposes
Pepe, Domenico. "Deep sub-micron RF-CMOS design and applications of modern UWB and millimeter-wave wireless transceivers". Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13815/document.
Texto completo da fonteThe research activity carried out during this PhD consists on the design of radio- frequency integrated circuits, for ultra-wideband (UWB) and millimeter-wave sys- tems, and covers the following topics: (i) radio-frequency integrated circuits for low-power transceivers for wireless local networks; (ii) fully integrated UWB radar for cardio-pulmonary monitoring in 90nm CMOS technology; (iii) 60-GHz low noise amplifer (LNA) in 65nm CMOS technology
Kacou, Marc Emmanuel Vivien-Marie Wozan. "Design of Models for the Planning of Indoor Multi-technology Wireless Networks". Thesis, Rennes, INSA, 2019. http://www.theses.fr/2019ISAR0010.
Texto completo da fonteThe constant evolution of wireless technologies such as Wi-Fi, mobile networks standards or IoT, has given rise to new applications and usages. The possibilities offered by this multitude of alternatives are exploited by heterogeneous wireless networks which, by combining within a single network several technologies, provide the users with a seamless access to complementary services. However, to take full advantage of these benefits, there are several technical issues to address. One of them is related to the deployment of these multi-technology networks. In practice, this task relies, most of the time, on radio network design software to achieve optimal planning. In such context, the main objective of this thesis is to establish models which can be used by radio network planning tools in order to the deployment of multi-technology wireless local area networks. This task has involved calibrating propagation models for radio coverage estimation, in residential indoor environments from 800 MHz to 60 GHz; developing a throughput model for Wi-Fi capacity estimation based on uplink and downlink traffic; and establishing a multi- objective resolution model to optimize the positioning of access points operating at 5 and 60 GHz. Moreover, this thesis also proposes practical recommendations for a better positioning of access points during deployment phases. This task has been achieved through coverage sensitivity studies to various factors, such as the transmitter surroundings or the presence of obstructing people
Alaji, Issa. "Design and characterization of power detectors in 55-nm BiCMOS technology for 5G and THz applications". Thesis, Lille, 2020. http://www.theses.fr/2020LILUI080.
Texto completo da fontePower detectors are the key blocks to establish the power measurement. Therefore, they are considered among the most important circuits in many microwave and millimeter wave applications (such as communication systems, medical equipments, radar systems, etc.). In this context, this thesis presents the design, characterization and theoretical analysis of different diode based power detectors, built in 55nm-BiCMOS technology from STMicroelectronics, in different frequency bands, towards different applications. For 5G applications in the frequency band (35-55) GHz, tunable detectors are designed to be used in different applications, since their parameters can be adjusted. In addition, several topologies of zero bias detectors are designed to help improving the efficiency in the 5G and IoT devices. This can be realized by employing those detectors in envelop tracking circuits which reduce the power consumption of power amplifiers. Two frequency compensated detectors in the frequency bands (140-220) GHz and (450-600) GHz are designed providing stable and high sensitivity value over the whole frequency band of interest. These detectors can be used for on-chip power detection which helps increasing the power measurement efficiency at such high frequencies. These detectors can be also used in THz applications such as THz imaging and radars. Some detectors in this work reach the state of the art performances in several frequency bands, thanks to their original designs executed in STMicroelectronics technology
Demirel, Nejdat. "Co-design d’un bloc PA-antenne en technologie silicium pour application radar 80GHz". Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14167/document.
Texto completo da fonteThis work focuses on the design of a power amplifier (PA) at 79 GHz and the co-integration of the PA and the antenna on SiGe technology. The objective of this thesis is to develop a RF front-end block for radar applications at 79 GHz. This block is compound of a power amplifier, antenna and PA/Antenna inter-stage matching. The inter-stage between the PA and the antenna adds supplementary losses in the global performances, especially prohibitive in integrated technology for high frequencies. The co-design of the antenna and the PA allows to suppress the traditional inter-stage impedance matching between these two blocks. More specifically, it is suitable to design the antenna with the appropriate output impedance of the PA which gives optimal performances for maximum power and efficiency
Moron, Guerra José. "Design of Sub-THz heterodyne receivers in 65 nm CMOS process". Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10053/document.
Texto completo da fonteThe main goal of this thesis is to explore design opportunities beyond the millimeter wave frequencies and to get as close as possible to the THz band using CMOS technologies. The main application is the heterodyne detection for THz imaging. The cut-off frequencies ft/fmax of the used process (65 nm CMOS) are 150/205 GHz, the chosen operation frequency of the developed systems is 280 GHz which means that the circuits developed during this thesis operate at least 80 GHz beyond their fmax cut-off frequency. Two 280 GHz sub-harmonic injection locked oscillators were developed, the injection frequency corresponds to one sixth of the ouput frequency. In order to generate oscillations beyond fmax, harmonic boost techniques are used such as the push-push and triple push techniques. The output power of the oscillators are - 19 and - 14 dBm at 280 GHz. Both components were used as local oscillators for two heterodyne receivers operating around the same frequency. In order to down-covert the Sub-THz signal, a passive resistive mixer is used; this kind of circuit allows mixing beyond the active transistor limits. Also there is no LNA at the begining of the Rx chain since the cut-off frequencies are very low and there will be no gain for amplification at 280 GHz. The conversion gain of both receivers is - 6 dB however the NF's are 36 dB and 30 dB. The best receiver (30 dB) is co-integrated with an antenna (developed by Labsticc) using the same process allowing heterodyne detection THz imaging
Severino, Raffaele Roberto. "Design methodology for millimeter wave integrated circuits : application to SiGe BiCMOS LNAs". Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14284/document.
Texto completo da fonteThe interest towards millimeter waves has rapidly grown up during the last few years, leading to the development of a large number of potential applications in the millimeter wave band, such as WPANs and high data rate wireless communications at 60GHz, short and long range radar at 77-79GHz, and imaging systems at 94GHz.Furthermore, the high frequency performances of silicon active devices (bipolar and CMOS) have dramatically increased featuring both fT and fmax close or even higher than 200GHz. As a consequence, modern silicon technologies can now address the demand of low-cost and high-volume production of systems and circuits operating within the millimeter wave range. Nevertheless, millimeter wave design still requires special techniques and methodologies to overcome a large number of constraints which appear along with the augmentation of the operative frequency.The aim of this thesis is to define a design methodology for integrated circuits operating at millimeter wave and to provide an experimental validation of the methodology, as exhaustive as possible, focusing on the design of low noise amplifiers (LNAs) as a case of study.Several examples of LNAs, operating at 60, 80, and 94 GHz, have been realized. All the tested circuits exhibit performances in the state of art. In particular, a good agreement between measured data and post-layout simulations has been repeatedly observed, demonstrating the exactitude of the proposed design methodology and its reliability over the entire millimeter wave spectrum. A particular attention has been addressed to the implementation of inductors as lumped devices and – in order to evaluate the benefits of the lumped design – two versions of a single-stage 80GHz LNA have been realized using, respectively, distributed transmission lines and lumped inductors. The direct comparison of these circuits has proved that the two design approaches have the same potentialities. As a matter of fact, design based on lumped inductors instead of distributed elements is to be preferred, since it has the valuable advantage of a significant reduction of the circuit dimensions.Finally, the design of an 80GHz front-end and the co-integration of a LNA with an integrated antenna are also considered, opening the way to the implementation a fully integrated receiver