WorldCat Identities

Ghiotto, Anthony (1982-....).

Overview
Works: 18 works in 20 publications in 2 languages and 24 library holdings
Roles: Opponent, Other, Thesis advisor, Author
Publication Timeline
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Most widely held works by Anthony Ghiotto
Conception d'antennes de tags RFID UHF : application à la réalisation par jet de matière by Anthony Ghiotto( Book )

3 editions published between 2008 and 2009 in French and held by 3 WorldCat member libraries worldwide

L'identification par radiofréquence constitue une technologie émergente et très prometteuse pour l'identification des biens et des personnes : automatisation des opérations manuelles, rapidité, informations précises... Il existe plusieurs technologies RFID. Dans cette thèse, nous nous intéressons à la technologie UHF passive et plus particulièrement à la conception, caractérisation et fabrication des antennes de tags RFID. En 2007, il s'est vendu plus de 1,7 milliard de tags RFID. En vue de réduire le coût de ces derniers, nous abordons leur fabrication par une technique très prometteuse qui pourrait révolutionner l'électronique, le jet d'encre. Ces travaux s'appuient sur des simulations électromagnétiques et des mesures, et considèrent différents types d'antennes RFID
Conception d'un système de navigation sans fil à faible consommation pour les personnes malvoyantes by Thanh Huong Nguyen( )

1 edition published in 2014 in English and held by 2 WorldCat member libraries worldwide

Over the last decades, the rapid development of wireless technology and microelectronic has caused a profound impact on our daily lives. Alongside the trend, assistive technologies have revolutionized in terms of miniaturization and wearability. The traditional bulky aided devices systems with wired connection are now replaced by the compact, lightweight and portable ones. The number of blind and visually impaired people continues to deal with many difficulties in daily lives, especially in mobility and navigation. The theory of sensory substitution in which information gained from one sensory modality can reach brain structures physiologically through other sensory modalities; therefore, it is possible for the blind and visually impaired people to get desired information via other senses. Based on these technologies and principles, we want to enhance the Tongue Display Unit, a lingual visuo-tactile device was invented by Professor Bach-y-Rita to a wireless, wearable, long-term device for navigation. In order to make such device, some properties have to be studied: optimization of energy consumption (to make it long-term) and efficient wireless communication. We made a very detailed review in order to choose the optimal components and method for our system. The hardware design was calculated and selected the best algorithm. The ZigBee-based wireless transceiver module contributes to reducing the overall power consumption. Our omnidirectional antenna is appropriate for usage in blind people who cannot orient in advance. We modified all components of the TDU, from the hardware to software, from controller to actuator. The design of the electrode array is not rectangular as traditional but in a round shape which is supportively used for direction and navigation. Lastly the TDU system was validated by real-time operation and tested on real users. The performance of the system in terms of design and energy has been improved. The wireless communication is more effective and consumes less power. The primary results on users' trials show rather good perception on our TDU
Echantillonneur opto-electronique femto seconde by Hanae Zegmout( )

1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide

Dans un monde de plus en plus connecté, il devient indispensable de trouver des moyens d'augmenter le débit d'informations qu'il est possible de véhiculer et de traiter. Ce besoin impose aux ingénieurs des contraintes plus serrées en termes de bande passante et de fréquence d'horloge des circuits qu'ils conçoivent.Or, les circuits d'horloge en microélectroniques sont limités par leur performance en termes de stabilité de la période d'horloge, i.e., en termes de « gigue d'horloge » ; cette limitation provient du bruit inhérent au circuit des horloges et rend donc le signal échantillonné inexploitable.Un moyen de se libérer de cette contrainte pourrait être de passer par la photonique intégrée. En effet, les horloges optiques, i.e les lasers pulsés, présentent des performances très intéressantes en termes de stabilité ou de gigue en comparaison avec les horloges en microélectroniques: les gigues des horloges optiques sont cinq fois plus faibles que la plus faible gigue d'horloge électronique citée dans la littérature.L'idée principale de cette thèse est de concevoir un circuit d'échantillonnage qui utilise les pulses du laser comme horloge et qui échantillonne un signal électronique. La brique de base du circuit en question est un photoconducteur en Germanium : une résistance en Germanium dont la résistivité varie selon la puissance du signal optique qu'elle reçoit du laser pulsé. Le photoconducteur dans ce cas précis jour le rôle d'un interrupteur piloté par le laser, et connecte l'entrée RF à la capacité d'échantillonnage. Quand l'interrupteur reçoit un pulse de lumière sa résistance chute et le signal RF peut être copié vers la capacité. Dès que le pulse de lumière s'arrête, le photoconducteur en Germanium retrouve sa résistance initiale et déconnecte ainsi l'entrée RF de la capacité qui contient le signal échantillonné.Cette thèse se propose d'étudier la faisabilité d'un tel circuit et la possibilité d'exploiter la performance des lasers en termes de stabilité de l'horloge dans l'échantillonnage d'un signal électrique.Dans le cadre de la thèse, nous avons essayé d'implémenter le circuit de base présenté auparavant et avons rencontré plusieurs défis. D'abord, les valeurs des résistances Off du photoconducteur n'étaient pas assez élevées pour permettre de déconnecter entièrement le signal RF de la capacité d'échantillonnage. Cela est dû à la présence d'un dopage résiduel lié au procédé de fabrication des photoconducteurs. L'utilisation du Germanium implique également que le passage de l'état On à l'état Off du photoconducteur n'est pas instantané, mais est fonction de la durée de vie des porteurs de charge créés suite à l'exposition aux pulses de lumière (de l'ordre de la nanoseconde).Nous avons contourné ces problèmes en utilisant trois méthodes : une nouvelle géométrie des photoconducteurs en Germanium qui permet de maximiser le rapport Roff/Ron (géométrie brevetée), un contre-dopage pour augmenter la résistivité du matériau et finalement un circuit électronique qui permet de re-échantillonner le signal en utilisant une horloge photonique basée sur les pulses du laser. Nous avons également exploré la possibilité de concevoir des horloges photoniques qui présentent une très faible valeur de gigue et dont la longueur du pulse peut être modifiée de manière indépendante de la longueur du pulse laser utilisé pour les générer
Guides d'onde Intégrés au Substrat (SIW) multicouches à haute performance pour des circuits millimétriques à faible coût by Frédéric Parment( )

1 edition published in 2016 in English and held by 2 WorldCat member libraries worldwide

La technologie SIW, introduite dans les années 2000, suscite aujourd'hui un très vif intérêt pour la conception de circuits micro-ondes compacts, intégrés, faible coût et blindés par nature. Cependant, les guides d'onde métalliques, qui offrent de bien meilleures performances en termes de pertes d'insertion et de tenue en puissance, malgré un coût bien plus important, sont encore incontournables pour de nombreuses applications millimétriques. Afin de proposer une alternative intégrée et faible coût au guide d'onde rectangulaire, et de permettre une large exploitation du spectre millimétrique, cette thèse propose une nouvelle structure SIW appelée SIW creux. Cette nouvelle structure a été étudiée théoriquement et expérimentalement. Aux fréquences millimétriques, comparativement au SIW, le SIW creux offre des pertes d'insertion trois fois plus faible ainsi qu'une tenue en puissance moyenne quatre fois plus importante. De nombreux dispositifs passifs SIW creux ont été conçus en prenant avantage du procédé de circuit imprimé multicouche mis en œuvre. Des coupleurs, déphaseurs, diviseurs de puissance, antennes et filtres ont été réalisés basés sur la technologie introduite. Leurs performances sont théoriquement et expérimentalement comparées avec leur contrepartie SIW afin de démontrer les avantages de la nouvelle technologie proposée
Contrôle du rayonnement des antennes miniatures by Kawtar Belmkaddem( )

1 edition published in 2015 in French and held by 2 WorldCat member libraries worldwide

In the current context where the evolution of communicating objects is important indifferent growing fields such as: localization, wireless multimedia systems, etc., controlling theradiation pattern of antennas is one of the most important issues for future radio communicationsystems. In recent years, despite the growth experienced in the areas of antennas, the issue of smallantennas radiation control knows several barriers preventing their deployment. This thesis focuses onthe analysis of the problem of controlling the radiation pattern of small antennas and aims to raisesome questions about a little-explored subject of study. This work gives an approach using differenttechniques to develop new concepts of controlling the radiation pattern of antennas
5G 28 GHz high efficiency integrated phased array transceivers by Thibaut Despoisse( )

1 edition published in 2020 in English and held by 1 WorldCat member library worldwide

The limitations of the current mobile telecommunication generation (4G) are actually reached. Indeed, the available data rate and the maximum number of users are no longer sufficient. A new generation (5G) is being developed to cope with these needs. It will target different use cases: internet of things, ultra-high data rate communications, and some critical applications such as autonomous vehicles or remote surgery. The needs are much higher than the existing network capabilities. So, innovative solutions have been proposed.In this thesis work, a new sizing methodology has been developed for 5G systems. It is applied to the Ka-band high data rate communication use case. Several architectures which meet the defined specifications have been studied. A methodology has been implemented to compare their performances depending to their power consumption. Thus, the best suitable architecture for the targeted use case is chosen. Finally, an advanced CMOS technology has been chosen and characterized in order to realize parts of the 5G system. RF switches and low noise amplifier operating in the Ka-band have been designed
Electric and magnetic one- and two-dimensionally tuned parameter-agile substrate integrated waveguide components and devices by Sulav Adhikari( )

1 edition published in 2014 in English and held by 1 WorldCat member library worldwide

In this work, new types of microwave tunable devices, circuits and components based on substrate integrated waveguide (SIW) are presented. SIW technology can be considered as a synthesized planar form of rectangular waveguide, and inherits almost all of its properties. For example, similar to rectangular waveguide, SIW is lower in loss, it can be used for higher power applications compared to conventional planar counterparts, and it is lower in cost. Although SIW is similar to rectangular waveguide in many aspects, it holds a significant difference in terms of size. Rectangular waveguide is usually made of hollow metallic tube (rectangular or circular), therefore at a given frequency, its size is much larger than the conventional planar transmission lines (microstrip or coplanar). Thus, even though rectangular waveguide being capable of delivering outstanding RF performance cannot be directly used in realizing compact planar circuits. Since SIW technology inherits almost all the properties of rectangular waveguide and also it is planar in nature, it is an outstanding candidate in realizing microwave and millimeter wave planar integrated circuits. However, SIW is usually fabricated on dielectric substrate, thus its power handling capabilities and its performance in terms of losses are largely dependent upon substrate material used and structure topology
Contribution au co-design et à la co-intégration de réseaux d'antennes actives multi-bandes pour systèmes de radionavigation par satellite by Johann Sence( )

1 edition published in 2019 in French and held by 1 WorldCat member library worldwide

Ce travail de thèse s'inscrit dans le contexte actuel d'une très forte augmentation de la densité d'intégration des systèmes électroniques pour les équipements de communications, de localisation ou de surveillance. Le déploiement de ces systèmes doit aussi répondre à une demande croissante de flexibilité en termes de fréquences, de puissance ou de couverture. La flexibilité en fréquence peut être simultanée avec des dispositifs multi-bandes ou sélective par reconfiguration de la bande de fréquence. La flexibilité en puissance permet de minimiser la consommation du système et la flexibilité de couverture d'orienter le faisceau vers la cible afin d'optimiser le bilan de liaison ou au contraire se protéger d'une source de bruit. L'augmentation de l'efficacité et de la compacité passe par le regroupement de fonctions élémentaires (LNA/filtre/antenne) qui permet de réduire les étages d'interconnexion et de prendre en compte les interactions entre les différents éléments. L'objectif premier de ce projet est donc de développer une méthodologie de conception conjointe de l'antenne et des circuits associés (filtres et LNA) pour atteindre des performances (rayonnement, efficacité, etc.) optimales avec un dispositif intégré et compact
Synthèse de filtres hyperfréquences prenant en compte le comportement dispersif des couplages by Ahmad Haidar( )

1 edition published in 2018 in French and held by 1 WorldCat member library worldwide

This thesis report deals with the development of a methodology for the design of bandpass filters including dispersive coupling to optimize the selectivity of these filters by generating and controlling the position of additional transmission zeros. A state of the art on the different approaches proposed in the literature for the synthesis of microwave filters with dispersive coupling is first proposed. This analysis is illustrated by several concrete examples, and a structure in particular, comprising a coupling capacitive post, is the starting point of the work. New dispersive coupling elements were then proposed, capable of generating both positive and negative couplings, thus enabling the transmission zeros to be positioned in the upper or lower stopped band. These elements have then been integrated in more complex filtering structures to achieve, for example, on-line structures having several out-of-band transmission zeros or multiband filters with enhanced selectivity. Many of the devices designed have been manufactured and measured. The experimental results are in good agreement with the simulations validating the proposed approach
Développement de système antennaire pour les communications 5G by Tran Quang Khai Nguyen( )

1 edition published in 2020 in English and held by 1 WorldCat member library worldwide

The 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
Lecture de Tags miniatures pour les environnements électromagnétiques sévères by Imbolatiana Rakotomalala( )

1 edition published in 2020 in French and held by 1 WorldCat member library worldwide

The design and production of RFID tags, particularly UHF, optimized for a given application has been and remains a driving force behind many R&D projects, both at the academic and industrial levels. Over the last decade, these developments have focused on two complementary visions, but quite different in terms of final objective. One favored the optimization of the tag antenna while the other focused on the performance of the RFID chip. In this thesis, we explore a new way to read very small tags for metallic objects, placed in a closed and entirely passive metallic environment. The work presented in this thesis is thus divided into two axes. The first one is dedicated to the study and development of solutions for the contactless transfer of RFID signals in order to feed RFID tags in a confined metallic environment. The second one is dedicated to the development of passive solutions to efficiently read miniature RFID tags placed on small metal objects. In both aspects of our work, practical considerations such as cost, integration and performance have been addressed in order to achieve a final solution that can be produced on a large scale for the industry
Air-Filled Substrate Integrated Waveguide (AFSIW) Filters and multiplexers for space application by Tifenn Martin( )

1 edition published in 2019 in English and held by 1 WorldCat member library worldwide

The emergence of novel microwave and millimeter wave applications in the automotive and communication sectors including the internet of things (IoT), the fifth generation of mobile (5G), and the new space, require the development of new alternative technologies providing a suitable tradeoff in terms of size, weight, power, and cost (SWaP C). This change of paradigm is essentially due to the increase of data rate, leading to the growth of bandwidth. As a substantially increasing number of systems are competing for frequency spectrum occupancy, the microwave community is pushed to develop new innovative systems at higher frequency with an increased efficiency.This change of paradigm has highly stimulated the development of low cost, high performance, highly integrated, compact, and mass producible microwave and millimeter wave systems. At the heart of a system, microwave and millimeter wave filters are essential devices allowing to select the desired information. Low loss filters are highly desired in transmitter and receiver circuits to achieve high efficiency and low noise figures. The conventional way to achieve low loss performance is to use high quality factor resonators. For most high performance applications, the air-filled rectangular waveguide (RWG) technology is used to comply with the severe specifications requested by the industry. Nevertheless, this technology becomes prohibitive in terms of cost where a mass production is needed. To reduce the cost of such components, the use of the so called substrate integrated waveguide (SIW) emerging technology has been proposed. This technology benefits from low cost and highly integrated properties. The SIW technology is a good candidate for application that needs low cost with medium insertion loss, but for high performance applications, such as the emerging new space, the achieved performances are not compliant with the severe specifications, making the implementation of the SIW technology for high performance applications restrictive.Recently, the alternative air filled substrate integrated waveguide (AFSIW), based on multilayer printed circuit board (PCB) is expected to fulfill satellite constellation application requirements as it offers a compromise between the conventional RWG and SIW technologies. This structure aims to dramatically reduce the insertion loss of the propagation medium, while maintaining the high integration and low cost aspect. Hence making it a potential good candidate for future generation of satellite payloads.Taking into consideration the presented context, the work carried out during this Ph.D. thesis has been led towards the implementation of the AFSIW for the new space applications. A particular attention has been given to the proposal, analysis, development, and implementation of innovative and original concepts for microwave filtering functions. The proposed work is based on the classic waveguide theory taking advantage of the standard PCB process to allow the development of improved and novel filters and multiplexer for space applications.This Ph.D. thesis highlights the last advances made on the development of microwave filters and multiplexer using the AFSIW technology. This includes the starting ideas, theoretical demonstrations, simulations, and experimental validations with fabricated prototypes. The results of this work are promising and demonstrate the relevance of the technology for its implementation in future satellite payload systems. In fact, a sub system of a satellite payload has been developed in this thesis to answer the need of the European Space Agency (ESA) and the Centre National d'Études Spatiales (CNES). The demonstrated concepts gained from this thesis can be considered as a good base to further develop and popularize the AFSIW technology not only for space applications but also for ground systems
Technologie émergente pour le développement de circuit RF et millimétriques à base de nanotubes de carbone by Phi Long Doan( )

1 edition published in 2020 in English and held by 1 WorldCat member library worldwide

The fifth-generation (5G) technology is known as the new generation of mobile data connectivity and wireless communication systems. It will provide breakneck broadband speeds and will have enough capacity to perform every function without a decrease in connection speed, no matter how many peoples are connecting into the network at the same time. One of the main benefits of 5G technology over the fourth-generation (4G) technology is not only its speed of delivery, between 10Gbps and 100Gbps, but also the latency. Specifically, the underemployed spectrum in the millimeter-wave frequency band (30-300 GHz) might be seen as a potentially profitable solution for achieving the aforementioned purposes. However, the development of next generation of mm-wave high performance circuits and systems is requiring low-cost fabrication process, small area, low consumption and 3D integration. In this context, CNT-based technology has attracted a lot of attention and could be considered as an excellent candidate for designing the mm-wave circuits due to its outstanding characteristics as compared to the other materials. Therefore, in this thesis, in the framework of the ANR project TRICOT, CNT will be considered as particular materials to design and develop a new 3D integration technology and concept dedicated to future applications in mm-wave interconnects and circuits.The work achieved in this PhD thesis was principally concentrated in two directions. The first one involves in the utilization of CNT technology to design the AF-SIW circuits for mm-wave applications in E-band. The second direction concerns the utilization of the slow-wave concept for the miniaturization of AF-SIW circuits designed for the RF applications based on both conventional PCB and CNT technologies. In both subjects, the proposed structures were detailed, then theoretical analyses were developed, and simulation and measurement results were presented. The retro-simulations were also realized when needed, which permitted to validate the proposed concepts by proofs of concept.In the first chapter of this thesis, an overview concerning the techniques utilized to design and fabricate BM was introduced in both RF and mm-wave frequency bands. Miniaturization techniques and low-loss air-filled technology were also presented in this chapter. The second chapter introduced in detail the physical properties of carbon nanotubes. Due to its outstanding properties as compared to other materials, CNTs could be considered as a potential material for next-generation electronics applications in order to replace classical metal-based structures. The analytical and electromagnetic modeling of CNTs were also introduced in this chapter, based on the work performed at XLIM laboratory, Limoges, France. Thanks to the bulk model, the CNT-based devices are designed more easily, and with accuracy. In the third chapter, a detailed description of AFSIW waveguide based on CNT technology was presented. Furthermore, the CNT technology used to design the AFSIW waveguide was also applied to the design of 0-dB and 3-dB couplers based on the short-slot topology with the same concept. In the fourth chapter, AF-SW-SIW design blocks based on CNT technology designed at 28 GHz for RF applications was investigated and presented. Finally, the last chapter was dedicated to the detailed description of PAF-SW-SIW waveguide based on conventional PCB technology designed at 28 GHz for RF applications
Conception d'un modulateur électro-optique Mach Zehnder 100 Gbits/s NRZ sur silicium by Jérémie Prades( )

1 edition published in 2016 in French and held by 1 WorldCat member library worldwide

The sustained development of software applications including mass storage, intensive computing and broadband communication, motivates the emergence of novel communication technologies. On one hand, communications through metallic interconnections approach their inherent limitations in term of energy, area and cost per bit. On the other hand, conventional hybrid photonics, based on discrete 2D/3D photonic assemblies of III-V photonic devices, cannot be integrated. The rising silicon photonic technology, thanks to its high level of integration, overcomes the shortcomings of the two previous approaches and promises a low cost solution allowing close proximity integration of photonics with electronics.The design of a very high data rate electro-optic modulator on silicon is reported in this thesis manuscript. In a first section, the state of the art of optic systems is presented with a focus on the main technological challenges limiting performances. Then, a silicon based topology is introduced to achieve a 100 Gbs Mach Zehnder modulator. It was implemented with the STMicroelectronics PIC25G technology. The driver of this modulator was designed with the 55 nm SiGe BiCMOS technology of the same founder. The demonstrator introduced in this work offer a 100 Gbs data rate with an NRZ modulation on a single optical channel. For this configuration, this prototype provides a data rate beyond the state of the art (for a single optical transmission path) with an energy per bit of 80 pJ/bit
Micro-fabrication additive des filtres à fort facteur de qualité pour des applications en bande W/G by Naira Jguirim( )

1 edition published in 2021 in French and held by 1 WorldCat member library worldwide

Dans le cadre de ce travail, des filtres passe-bande hyperfréquences ont été développées pour répondre à des spécifications proposées en bandes W et G. Nous avons utilisé la technologie de micro-fabrication additive permettant d'avoir des cavités métalliques à air avec un fort facteur de qualité
Amplificateur de puissance à polarisation contrôlée et à faible variation du temps de propagation de groupe pour systèmes de localisation en technologie ultra large bande impulsionnelle by David Polge( )

1 edition published in 2016 in French and held by 1 WorldCat member library worldwide

The use of impulse radio (IR) ultra-wideband (UWB) technology for indoor localization systems both improves signal accuracy and reduces disturbances from multipath. A new standard for emergency situations requires the design of a higher output power UWB power amplifier (PA) as the usual maximum output power has been raised by 20 dB in order to allow the signal to pass through thick obstacles, thus helping rescue operations. First, a UWB PA state of the art is presented, and the design of both a power cell and a driver cell are detailed, to achieve the required output power level and additional gain, respectively. Finally, a bias controlled amplification system is described, taking advantage of the IR profile of the UWB signal. The PA is activated only for pulse occurrences, reducing drastically its power consumption
Conception d'amplificateurs de puissance en technologie CMOS pour le standard LTE by Fabien Mesquita( )

1 edition published in 2018 in French and held by 1 WorldCat member library worldwide

The LTE standard has been intended for mobile communications. Focusingnot only on higher data rate, LTE now aims at an implementation for the Internetof Things (IoT). The main challenge, in the perspective of a LTE front-end fully manufacturedin a low-cost and high integration level CMOS technology, remains the design ofpower amplifiers (PA). Furthermore, the use of complex quadrature modulation resultsin stringent linearity requirements resulting in an important quiescent dc consumption.In this context, this work focuses on the research of devices and circuits generatinghigh output power and solving the compromise between linearity and consumption ofthe PA. Two strands of work are identified and developed in this thesis. The first oneuses a power transistor available in CMOS technology. Three power cells based on thisdevice are proposed, with detailed theoretical and experimental results. In the secondone, this transistor is then used in a fully-integrated CMOS PA. A design methodologyfor integrated transformers is also presented. The proposed fully-integrated PA is reconfigurablein order to address the main LTE challenges : output power, high linearity andlow consumption
Évaluation de l'immunité électromagnétique de câbles hautement blindés en milieu hostile by Clément Pornin( )

1 edition published in 2021 in French and held by 1 WorldCat member library worldwide

The work shown in this report is about a sensitive issue in line diagnosticlinked to the civil nuclear safety on the restrictive installations of neutron instrumentation.The term restrictive comes from several detailed sources. The uselessness of classical linediagnostic methods in this case is shown and explained. The unusual EMC method basedon shield current injection is introduced. This method is different from the previous onesbecause it stimulates coupling. This method allows to detect partial shield defects but notto locate them. After, a study on the behavior of different shields architectures is performedby numerical electromagnetic modeling with the software CST MicroWaves. The purposeof this study is to understand the sources of coupling through shields and defects. Itis determined that a hole through the whole shield yields to magnetic coupling. Partialdegradations of the shield yield to increase of diffusion magnetic coupling linked to skineffect. This step allows to determine the orientation of the research toward the advancedtool developed afterward. An adaptation of the enhanced technic of time domain-frequencydomain reflectometry developed in some bibliographical works is introduced and applied.The application is performed on a practical measurement and several numerical simulationson a model of high immunity cable with different stages of degradations. The efficiencyof this method in « soft shield defects » troubleshooting as slight shield deteriorationsis investigated. This investigation shows that the method is efficient to detect a circulardefect with a diameter of one millimetter that affects only four of the five layers of shield
 
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