Academic literature on the topic 'Amplificateurs de puissance – Innovation'
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Journal articles on the topic "Amplificateurs de puissance – Innovation"
Jabbour, Ch, and G. Pham. "Apprentissage des systèmes de communications sans fil à base de plateformes SDR." J3eA 21 (2022): 1013. http://dx.doi.org/10.1051/j3ea/20221013.
Full textStark, Hans. "L’Allemagne, l’éternelle puissance civile." Allemagne d'aujourd'hui N° 235, no. 1 (March 3, 2021): 17–27. http://dx.doi.org/10.3917/all.235.0017.
Full textBilodeau, Pier-Luc. "Puissance et pouvoir en négociation collective." Articles 66, no. 2 (October 7, 2011): 171–91. http://dx.doi.org/10.7202/1006117ar.
Full textLeconte, Baptiste, Laurent Bigot, Philippe Roy, Raphael Jamier, Romain Dauliat, Marie-Alicia Malleville, Yves Quiquempois, Hicham El Hamzaoui, and Olivier Vanvincq. "Lasers de forte puissance : vers l’avènement de fibres optiques à aire effective extrême." Photoniques, no. 99 (November 2019): 23–27. http://dx.doi.org/10.1051/photon/20199923.
Full textBarjot, Dominique. "Transferts de technologie et innovation endogène." Entreprises et histoire 112, no. 3 (December 1, 2023): 5–17. http://dx.doi.org/10.3917/eh.112.0005.
Full textBrustlein, Corentin. "Innovation militaire, �quilibre de l�offensive et de la d�fensive, et distribution de la puissance." Les Champs de Mars N�17, no. 1 (2005): 183. http://dx.doi.org/10.3917/lcdm1.017.0183.
Full textYvelin, Maxime. "Préparer la guerre, Stratégie, innovation et puissance militaire à l’époque contemporaine, Olivier Schmitt. Paris, puf , 2024." Inflexions N° 57, no. 3 (August 20, 2024): 219. http://dx.doi.org/10.3917/infle.057.0219.
Full textd’Aboville, Benoît. "Schmitt Olivier, Préparer la guerre : stratégie, innovation et puissance militaire à l’époque contemporaine , PUF, 2024, 464 pages." Revue Défense Nationale 873, no. 8 (October 9, 2024): 125–30. http://dx.doi.org/10.3917/rdna.873.0125.
Full textFattam, Nejib. "Mutation de la prestation par innovation relationnelle : la puissance des réseaux sociaux et leurs usages par les 4PL." Logistique & Management 27, no. 4 (July 29, 2019): 264–75. http://dx.doi.org/10.1080/12507970.2019.1641166.
Full textRichez-Battesti, Nadine, Julien Maisonnasse, and Raphaël Besson. "Le tiers-lieu comme trajectoire territorialisée d’innovation sociale : le cas d’un territoire rural." Revue d’Économie Régionale & Urbaine Avril, no. 2 (May 29, 2024): 257–78. http://dx.doi.org/10.3917/reru.242.0257.
Full textDissertations / Theses on the topic "Amplificateurs de puissance – Innovation"
Nonet, Olivier. "Conception d’amplificateurs de puissance haut rendement en technologie MMIC pour applications radiocommunication 5G." Electronic Thesis or Diss., Limoges, 2024. http://www.theses.fr/2024LIMO0037.
Full textModern radio communication networks use complex modulated signals with high spectral efficiency, offering significant data rates. However, this comes at the expense of high peak factors.This latter parameter significantly degrades the average efficiency of amplifiers, leading to increased thermal dissipation, thereby limiting prospects for miniaturization, cost reduction, and reliability of the power amplifier. This work presents the design of an RF power amplifier >40W in the L/S band. This component has been specifically developed to be compatible with an envelope tracking efficiency enhancement system. To meet this requirement, a quasi-MMIC miniaturization approach in a plastic package, comprising a GaN HEMT 0.25µm on SiC active part, and passive adaptation circuits in AsGa (ULRC-20), have been selected. A multi-phase envelope tracking architecture has subsequently been developed to be associated with this amplifier and operate with complex 5G modulated signals, wideband with high PAPR levels (>8dB)
Abbouab, Clara. "Étude et conception de sources laser fibrées monomodes en régime continu multi-kW." Electronic Thesis or Diss., Limoges, 2023. http://www.theses.fr/2023LIMO0088.
Full textThis CIFRE thesis is a collaboration between the XLIM research laboratory and the industrial laser company "CILAS". The main objective of this work is to study and design high power fiber laser sources delivering a continuous wave single mode laser beam with an output power of several kW. To this end, the “MOPA” design (consisting a master oscillator stage and a power amplifier stage) was chosen from the literature and then has been built at XLIM. To the best of our knowledge, it is the first time in France that 2 kW of continuous wave output power has been achieved at the signal wavelength of 1080 nm. Thanks to the experimental results, a simulation tool was calibrated and used to carry out a theoretical study of the limits of this laser source. This tool has also been used to propose some improvements of this architecture by changing the pump wavelength, the signal wavelength, the doped fiber and the combination of the pump power between the two directions of propagation. The results of the simulations were compared with the experimental results obtained from a new source reaching more than 3 kW of continuous wave power. Finally, another less complex design, called OAIFL, was calibrated using the simulation and then built. A supercontinuum was generated by exploiting the temporally unstable laser cavity, delivering a power of 40.7 W over a spectrum going from 750 nm to 2200 nm at - 30 dB. As a perspective, the simulation showed that the OAIFL source could be further amplified to reach up to 3 kW. Therefore, this laser source could be further developed in the future
Theveneau, Hadrien. "Amplificateurs de puissance à transistors GaN." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10204/document.
Full textThe goal of this thesis is to realize a pulsed power source with GaN transistors. After a study of the applications of high power microwaves, and a state of the art of the sources, we realized two prototypes of elementary amplifier modules (wide and narrow band). The wideband module produces 70 W CW from 1 to 2.5 GHz, and the narrowband module produces a power higher than 550 W from 1.1 to 1.3 GHz, with a 750 W peak at 1.1 GHz, in 500 µs pulses with 10 % duty cycle. One difficulty is that GaN transistors have low input and output impedances, from 1 to 5 Ω, difficult to adapt towards the 50 Ω standard on a wide bandwidth, and that several transistors need to be combined to reach high input powers, ensuring their mutual isolation to avoid failure propagation and oscillations. We developpes a power combiner using an impedance pre-adaptation with a deffective ground plane allowing to reach a 2.5 Ω low input impedance, and using a microwave absorber to avoid odd mode reflections, which allows the mutual isolation of the transistors
Denoual, Jean Michel. "Combinaison de puissance : conception et réalisation d'une structure hybride 3D-planaire en bande K." Brest, 2007. http://www.theses.fr/2007BRES2034.
Full textThe satellite payload evolution will have a great impact on power amplifier efficiency, redundancy and flexibility. Solid state power amplifiers (SSPA) should be used to replace traveling wave tubes (TWT) but power combining techniques are necessary as SSPA output power levels are lower than TWT. The radial power combining technique is well suited for spatial applications. It consists in placing amplifiers around a radial waveguide to feed amplifiers with equi-magnitude and equi-phase signals. Transitions between various propagation structures (coaxial, rectangular, radial, planar) were optimized and tested and a new radial 16-way power divider-combiner including planar structures for SSPA mounting (MMIC) was designed. An original mechanism to balance MMIC phase dispersion was successfully implemented in the divider-combiner structure
Willmann, Benoît. "Fonctionnement des amplificateurs hautes fréquences de puissance à triode munis d'un circuit de réaction." Nancy 1, 2001. http://www.theses.fr/2001NAN10269.
Full textThis work is devoted to a study of the operation of the high frequency amplifiers provided with a feedback circuit. It is shown that it is possible to take part of the amplifier output power, through use of a grounded-grid triode, and to reinject it in phase, with the signal applied to the cathode. This increases the stage gain by a factor five and makes it possible to reduce the power which must be provided by the preamplifier. The positive feedback is made through a coaxial line, the length of which is close to the wavelength. A combiner ensures the addition of the signals, at the amplifier input. The concept of output impedance of a linear amplifier has been extended to nonlinear amplifiers, of classes B and C It is based on the same relation ship which binds the variations in gain to the variations of impedance of the load that the amplifiers. The output impedance of an amplifier, with a grounded-grid triode and whose output circuit is resonant, varies little when the stage is corrected by a positive feedback
Macraigne, François. "Développement d'un système de mesure temporel d'enveloppe de dispositifs non linéaires microondes." Limoges, 2005. http://aurore.unilim.fr/theses/nxfile/default/7c3f9242-5ea5-4708-84f1-779d39e35b75/blobholder:0/2005LIMO0042.pdf.
Full textThis work deals with the hardware and software development of a time domain envelope characterisation system of RF power devices. This calibrated measurement bench has been developed in order to generate and measure complex envelopes associated with the RF modulated signals at the input and the output ports of power devices under test. This manuscript describes the architecture of the calibrated measurement setup, its calibration procedure and the signal processing used for the correction of measured raw data in order to get error corrected measurements at the device under test reference ports. A first application consists in the linearity characterisation of a power amplifier for different modulated signals and different load impedance. A second application consists in the use of a bias modulation technique in order to linearize the behaviour a power transistor
Cesari, Bohigas Albert. "Implémentation de techniques de linéarisation et d'amélioration du rendement pour les amplificateurs de puissance RF." Toulouse, INSA, 2008. http://eprint.insa-toulouse.fr/archive/00000239/.
Full textThe antagonism between information capacity and energetic efficiency in the context of wireless communications, more precisely : the trade-off between transmitter linearity and its efficiency ; is the main driver of this thesis. A FPGA5-based architecture for digital predistortion (DPD) linearizers for RF power amplifiers is proposed in this thesis. By means of separating the adaptation process from the predistortion itself, a convenient, simple hardware building block for the DPD architecture inside the FPGA {the Basic Predistortion Cell (BPC){ has been identified. A BPC-based architecture provides independency from the particular DPD function derivation method, and it is easily scalable and reconfigurable, depending on the operation mode and degree of impairments introduced by the transmitter chain in each particular case. In order to support those claims and provide experimental evidence, two main different prototyping scenarios have been developed. In the first one, a DPD adaptive linearizer based on the passivity theory (hyperstable systems) has been designed and implemented on a low-cost mixed FPGA/DSP platform. Besides experimental results, complementary signal proces sing techniques to DPD are also addressed, thus giving a wide insight on realistic scenarios of DPD systems. In the second scenario, an advanced, adaptive DPD system aimed at compensating not only PA's nonlinear behavior, but also its memory effects, is presented. It is based on a Nonlinear Auto-Regressive Moving Average7 structure which is mapped into hardware using a BPC grid-structure. Besides the experimental results on PA efficiency and linearity, FPGA implementation issues {such as adaptation and power consumption{ are also studied. The manipulation of the PA class of operation to improve its efficiency, provided that DPD may be unavoidable due to the impact of memory effects, is discussed as well. Finally, to further improve efficiency, a DPD linearizer with dynamic supply built-in capabilities has been proposed and implemented as discussed in the last part of this thesis. There, an efficient, bandwidth limited, switched DC-DC converter is in charge of the PA supply modulation. The thorough design procedure targeting a FPGA implementation shows how the necessary functions for commanding the supply modulator can be seamlessly integrated within the DPD processor. The experimental results highlight how the proposed solution maintains linearity and enhances the PA efficiency when compared to a DPD-only method
Houbloss, Omar. "Étude et conception d'amplificateurs en ondes millimétriques à combinaison spatiale de puissance." Brest, 2005. http://www.theses.fr/2005BRES2015.
Full textEfficient combining techniques are needed for the development of power amplifiers at high frequency. The spatial combining technology, which consists in placing a defined number of plates in a rectangular waveguide, is one of the most advantageous ways in the design of power amplifiers. In fact, this technology affords a power combiner whose insertion losses are independent of the number of active components; a fact not afforded by planar technology where the insertion losses are related to the number of active components. Moreover, spatial combining technology offers a solid and compact structure with the possibility of using either a single mode waveguide or a multi-mode waveguide. With the second option, it is possible to increase the number of plates in order to reach higher power. In this case, the important issue is the control of the illumination in order to ensure the same excitation of all trays. A new multi mode waveguide combiner is presented, it helps limit the spatial amplifier degradations when dealing with a large number of trays
Augeau, Patrick. "Alimentations de puissance agiles en technologie GaN pour l’amplification de puissance RF." Limoges, 2014. https://aurore.unilim.fr/theses/nxfile/default/9021e9e4-b921-4e14-b994-76a04bf6c5db/blobholder:0/2014LIMO4010.pdf.
Full textIn telecommunication systems, the impact of front-end consumption on the system efficiency is one of the most critical issues which drives a lot of research effort. At power amplifier (PA) level, the implementation of efficiency improvement techniques is mandatory. The dynamic biasing technique (envelope tracking) appears as a promising technique for the modern standard communications requirements. In such a technique, the drain supply voltage of the PA is dynamically adjusted in accordance with the value of envelope signal being transmitted. State of the art works focusing on bias modulators for envelope tracking highlight the design complexity of such modulators to meet the expected efficiency, power and speed requirements. In this thesis, innovative topology and design method of GaN-based switching cells is theoretically analyzed and validated by non-linear transient simulations. Such improvements of switching cells are validated by two different demonstrators which are realized in high-frequency, high-power GaN HEMT technology. The first modulator is a DC-DC converter driven by a Pulse Width Modulation (PWM) signal, in order to perform a continuous tracking of the drain supply envelope. The second modulator operates in switching mode in order to perform a discrete tracking of the drain supply envelope. This last modulator was coupled to a RF power amplifier to experimentally demonstrate its efficiency without negative impact on PA linearity
Yattoun, Ismail. "Etude et mise en œuvre d’un banc de caractérisation fort-signal de transistors en ondes millimétriques : Application à la conception d'amplificateurs de puissance hybrides en bande Ka." Brest, 2006. http://www.theses.fr/2006BRES2016.
Full textThe optimized and efficient design of solid state power tanplifiers (SSPA) require the experimental large-signal characterization of transistors usina a load-pull test-bench. :The purpose is to determine the optimum device'sperfomances which depend on the operating conditions (frequency, bias voltages , input power) and loading-conditions. The optimum load impedances associated with maximum added power or with maximum added power efficiency for a given input power level can be obtained and, as a result, the information derived tiom these measurements maximizes circuit performances with reduced development time. With this approach, the non-lincar model of transistors at high frequencies can also be validated, thus improvise, the reliability of microwave design tools. The characterization of transistors under large signal is performed in the millimetre-wave range using the active loop technique with a new configuration implemented in the test bench. The design of power amplifiers for telecommunication applications at 28/30 GHz or 41 GHz can be therefore carried out
Books on the topic "Amplificateurs de puissance – Innovation"
Eroglu, Abdullah. Introduction to RF Power Amplifier Design and Simulation. Taylor & Francis Group, 2018.
Find full textEroglu, Abdullah. Introduction to RF Power Amplifier Design and Simulation. Taylor & Francis Group, 2018.
Find full textEroglu, Abdullah. Introduction to RF Power Amplifier Design and Simulation. Taylor & Francis Group, 2018.
Find full textEroglu, Abdullah. Introduction to RF Power Amplifier Design and Simulation. Taylor & Francis Group, 2018.
Find full textIntroduction to RF Power Amplifier Design and Simulation. Taylor & Francis Group, 2015.
Find full textEroglu, Abdullah. Linear and Switch-Mode RF Power Amplifiers: Design and Implementation Methods. Taylor & Francis Group, 2017.
Find full textEroglu, Abdullah. Linear and Switch-Mode RF Power Amplifiers: Design and Implementation Methods. Taylor & Francis Group, 2017.
Find full textEroglu, Abdullah. Linear and Switch-Mode RF Power Amplifiers: Design and Implementation Methods. Taylor & Francis Group, 2017.
Find full textLinear and Switch-Mode RF Power Amplifiers: Design and Implementation Methods. Taylor & Francis Group, 2017.
Find full textNonlinear Modeling Analysis and Predistortion Algorithm Research of Radio Frequency Power Amplifiers. Taylor & Francis Group, 2021.
Find full textBook chapters on the topic "Amplificateurs de puissance – Innovation"
Etievent Cazorla, William. "DE L’EFFET DE BORD À L’EFFET SONORE: LA GUITARE SATURÉE ENTRE PERFORMANCES TECHNIQUES ET PERFORMANCES ARTISTIQUES." In Quand la guitare [s']électrise!, 279–329. Sorbonne Université Presses, 2022. http://dx.doi.org/10.70551/gweu3820.
Full textKahane, Bernard. "Chapitre 8. Les nanotechnologies en Chine un levier de puissance ?" In China Innovation Inc., 277–303. Presses de Sciences Po, 2012. http://dx.doi.org/10.3917/scpo.biron.2012.01.0277.
Full textXenou, Lamprini. "Le modèle de souveraineté numérique européenne promu par la présidence française du conseil de l’Union européenne." In Annuaire français de relations internationales, 627–47. Éditions Panthéon-Assas, 2023. http://dx.doi.org/10.3917/epas.ferna.2023.01.0627.
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