Dissertations / Theses on the topic 'Rectenna'
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Efthymakis, Panagiotis. "A RECTENNA FOR 5G ENERGY HARVESTING." VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5485.
Full textTeru, Agboola Awolola. "Efficient rectenna circuits for microwave wireless power transmission." Thesis, University of Fort Hare, 2010. http://hdl.handle.net/10353/481.
Full textSarehraz, Mohammad. "Novel rectenna for collection of infrared and visible radiation." [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001124.
Full textTan, Lee Meng Mark. "Efficient rectenna design for wireless power transmission for MAV Applications." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Dec%5FTan%5FMark.pdf.
Full textThesis Advisor(s): David C Jenn, Richard Harkins. Includes bibliographical references (p.119-122). Also available online.
Adami, Salah-Eddine. "Optimisation de la récupération d'énergie dans les applications de rectenna." Phd thesis, Ecole Centrale de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-00967525.
Full textEtor, David. "Optimising the structure of metal-insulator-metal diodes for rectenna applications." Thesis, Durham University, 2016. http://etheses.dur.ac.uk/11903/.
Full textLiu, Chun-Yi. "An improved rectenna for wireless power transmission for unmanned air vehicles." Thesis, Monterey, California. Naval Postgraduate School, 2011. http://hdl.handle.net/10945/5561.
Full textThis thesis continues an NPS project related to wireless power transmission for micro air vehicles (MAVs). The conversion of radio-frequency (rf) power into usable direct-current (dc) power is performed by a rectifying antenna, or rectenna. The emphasis of this thesis is the simulation and experimental study of various rectenna designs to determine which best provides high efficiency, stable output power, and lightweight design. The analysis of rectenna design focuses on four subsystems: (1) the receiving antenna, (2) the matching sections, (3) the rectification, and (4) the post-rectification filter. Based on the findings of this research, the ultimate rectenna design implements a half-wave dipole antenna that performs full-wave rectification with two diodes. The post-rectification filter is implemented by a capacitor to obtain stable dc power. The final design achieved an efficiency of nearly 66% for input power in the range of 200 mW.
La, Rosa Henrry. "Investigation of a Rectenna element for infrared and millimeter wave application." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002221.
Full textHarouni, Zied. "Conception et caractérisation d'une Rectenna à double polarisation circulaire à 2.45 GHz." Phd thesis, Université Paris-Est, 2011. http://tel.archives-ouvertes.fr/tel-00682898.
Full textDao, Justin. "Development of a Physical and Electronic Model for RuO2 Nanorod Rectenna Devices." ScholarWorks @ UVM, 2016. http://scholarworks.uvm.edu/graddis/543.
Full textHarouni, Zied. "Conception et caractérisation d’une Rectenna à double polarisation circulaire à 2.45 GHz." Thesis, Paris Est, 2011. http://www.theses.fr/2011PEST1026/document.
Full textThe work presented in this thesis is within the subject of wireless power transmission, power applied to the remote sensors, networks of sensors and actuators with low power consumption. This study focuses on the design, characterization, and measurement of a rectenna circuit (rectifying antenna) with dual circular polarization at 2.45 GHz, and optimisation of the conversion efficiency. A global analysis tool, based on the iterative method was developed and used to validate the feasibility of this concept by this method. The Schottky diode was modeled using surface impedance. The dual circular polarization rectenna with microstrip technology has been optimized and characterized experimentally operating at 2.45 GHz. It includes the property of harmonic rejections. Two accesses can receive either direction LHCP or RHCP sense. The conversion efficiency of 63% has been measured with a power density of 0.525 mW/cm². A DC voltage of 2.82V was measured across an optimum load of 1.6 kohm
Makarov, Vitalii. "Rektifikační anténa." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-220885.
Full textKharrat, Ines. "Modélisation et réalisation d’un système de récupération d’énergie imprimé : caractérisation hyperfréquence des matériaux papiers utilisés." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT106/document.
Full textThe work presented in this thesis is part of microwave energy harvesting theme, applied to supply electrochromic displays for anti-counterfeiting applications. This study focuses on the design, optimization and implementation of rectennas (rectifying antennas) printed on cellulosic substrates with industrial printing techniques.Characterization of dielectric materials (paper) and conductors has been developed. The combination between the transmission line technique and the resonant cavity allowed the characterization of a flexible and copper free substrate over a wideband (500 MHz to 3 GHz). Dielectric losses of paper are too high to perform HF circuits. A wise choice of the substrate and of the optimization technique for circuit design enables performant rectennas.Two compact rectennas were developed in microstrip technology at 2.45 GHz, optimized and printed with flexography method using a single layer of conductive ink. The rectennas do not contain vias or HF side filter or DC side filter. The first rectenna was printed on corrugated paper. The output DC voltage across the display reaches 0.5 V for a power level at the input of the rectenna of -10 dBm. The second rectenna is a 3D rectenna, printed on flexible 100 µm thick plastic substrate. A DC voltage of 1 V was measured across the display when getting near a Smartphone on Wi-Fi mode. The rectennas are suitable for both near field and far field
Huang, Yong. "Development of a Rectenna Adapted to Ultra-wide Load Range for Microwave Power Transmission." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/199316.
Full textKrishnan, Subramanian. "Design, fabrication and characterization of thin-film M-I-M diodes for rectenna array." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000451.
Full textFougeroux, Tristan. "Conception et réalisation de rectenna en impression additive dédiée à l'optimisation énergétique d'objets connectés." Electronic Thesis or Diss., La Réunion, 2024. http://www.theses.fr/2024LARE0005.
Full textWireless power transfer and harvesting energy techniques have recently become alternative methods of powering next-generation wireless networks. The global trend toward the densification of wireless access points has alluded to the possibility of collecting unused ambient RF energy. These untapped energy sources are increasingly being developed due to the rapid growth of wireless communications activity. Most of these emissions are omnidirectional and permanent over time. The availability of this radiant energy may become attractive for specific low-power applications. The harvesting of this energy may represent an energy alternative capable of replacing, totally or partially, the battery of specific microsystems, particularly in the field of self-powered sensors (WSN: Wireless Sensor Network): this is the virtual battery concept. This thesis studies and optimizes an electromagnetic energy harvesting system called "Rectenna" (RECTifying-anTENNA). The objective is to design, optimize, produce and experimentally characterize innovative and compact high-performance rectenna circuits using a new 3D printing technique based on a conductive filament. This technique allows greater design flexibility with the realization of complex geometrical forms, allowing the modification of wave propagation in a material to increase the circuit's performance. This circuit should allow the collection of unused ambient RF energy, particularly in the industrial, scientific and medical band, to remotely power helpful electronic devices, more commonly known as the Low Energy Internet of Things (LEIoT)
Merabet, Boubekeur. "Contribution à l'étude de la transmission d'énergie à distance par µondes." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2010. http://tel.archives-ouvertes.fr/tel-00675751.
Full textRivière, Jérôme. "Conception et réalisation de rectenna en technologie guide d'onde coplanaire pour de faibles niveaux de puissance." Thesis, La Réunion, 2016. http://www.theses.fr/2016LARE0023/document.
Full textThe thesis subject dealt in this report lies in the LE²P framework on the energy sustainability of wireless sensor network. This work is dedicated to the reception and rectifying part of wireless power transfer to give energy sustainability to nodes in a sensor network. This process is not new and originate from the years 1950. The behavior of this process is since well-known in several waveguide such technology as microstrip. But the need of drill in those waveguide circuit may be inconvenient and lead to discrepancy from one circuit to another. This was the motivational keystone to the work address in this report which uses coplanar waveguide (CPW) over microstrip. The conception of such devices goes through a good conceptual and experimental understanding of the waveguide technology. The approach in this document consists of using coplanar waveguide while minimizing its drawbacks, in order to avoid drilling in the substrate and ease the realization of the rectifying part by limiting the human interaction
Jangid, Vikas. "Rectenna device on coupling of molecular diodes and plasmonic nano-antennas to convert light into electricity." Electronic Thesis or Diss., Aix-Marseille, 2022. http://www.theses.fr/2022AIXM0032.
Full textMassive use of fossil fuel is causing climate change and global warming at an alarming rate. The development of alternative and renewable energy resources is an urgent need of the hour. This thesis work focuses on development of a third generation solar cell device which exploits the wave nature of light surpassing the Schockley-Queisser limit. The device is called rectenna (rectifying antenna) and composed of coupling of plasmonic nano-antennas and molecular diodes. The working principle of the device is as follows: absorbing incident light by silver nanocubes as antennas (on top), channeling the electronic flow of charges by ferrocene based molecular rectifiers (in between) and ultra-smooth gold substrate (at the bottom) to make Ag-SAM-Au assembly. Silver nano-cubes functionalized with dithiol rectifying molecules are self-assembled onto a gold film. When illuminated, such a rectenna architecture allows the coupling of a strongly confined plasmon cavity mode between silver nano-cubes and the gold plane. The plasmonic coupling results in an electromagnetic field intensity enhancement up to four orders of magnitude within the cavity, exactly where the rectifying molecules are localized. The electronic and supramolecular structure of the molecules is extensively studied along with synthesis of monodispersed silver nanocubes and fabrication of ultra-smooth gold substrate, the Ag-SAM-Au self-assembly is optimized with electrical and optical characteristics for the application of light to electricity conversion
Reynaud, Clément. "Nanoantennes rectifiantes pour la conversion de lumière en électricité." Electronic Thesis or Diss., Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0225.
Full textSince Einstein's and De Broglie's works in the early XXth century, the double nature of light being a set of particles as well as a wave is admitted in the scientific community. Today, both solar energy production and light detection are based on the photovoltaic effect which relies on the corpuscular description of light. To investigate a new way to produce electricity out of light, the concept of rectifying antenna is derived from the wave description. As an electromagnetic wave, light can be haversted by an antenna just like a radiowave. Although the first theoretical descriptions of this phenomena go back to the late sixties, it has just been a decade since a few experimental demonstrations of rectifying antennas designed for visible and infrared light have been published. This is explained by the recent progresses of the nanofabrication processes. This thesis aim to propose an innovative design of rectifiying nanoantennas able to address the two main challenges which are: the fabrication of reproducible nanoantennas at the nanoscale; and the rectification of the alternative current which arises when light is absorbed in the nanoantennas
Franciscatto, Bruno. "Conception et réalisation d'un nouveau transpondeur DSRC à faible consommation." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT037/document.
Full textTo increase the efficiency and safety of the road traffic, new concepts and technologies have been developed in Europe since 1992 for RTTT applications (Road Traffic & Transport Telematics). These applications use the Dedicated Short Range Communications (DSRC) devices at 5.8 GHz (ISM band). In view of the reliability and success of this technology, the use of such equipment is thus extended to the EFC (Electronic Fee Collection) or e-toll and also in many other application areas such as fleet management, public transport and parking management. Due to the broad applications, these equipments are subject to various standards CEN/TC 278, CEN ENV (EN) 12253, ETSI, etc.... The DSRC system consists in a transceiver (reader) and transponders (tags). Industrial approaches are oriented to semi-passive transponder technology, which uses the same signal sent by the reader to retransmit, performing a frequency shift and encoding data to be transmitted. This design avoids the use of the local oscillators to generate the RF wave, as in active transponders, and save electrical energy of batteries. This allows the development of relatively low cost and small size transponders. Despite advances in integrated low-power circuits technology, this concept still requires a lithium battery to operate the transponder for a period of 4-6 years. However, with the expansion of these facilities, it appears that over the years the amount of lithium to destroy has become a crucial problem for the environment. Nowadays designing a completely autonomous DSRC transponder is not feasible, since the amount of energy required is still high (8 mA/3.6 V active mode). Nevertheless, reducing the transponder electrical power consumption, as a solution to at least double the battery life, could be a good start point to improve environment protection.In this thesis we propose a new DSRC transponder with an original statechart that considerably reduces the power consumption. After validation of the new low-power consumption mode, we studied the possibility to recharge the battery of the transponder by means of Wireless Energy Harvesting. The DSRC Toll Collection RF link budget was carried out in order to estimate the amount of energy available when a car with a transponder passes through a toll system. However, RF link budget at 5.8 GHz presents a low power density, since the car does not stay enough on the DSRC antenna's field to proceed to energy harvesting. Therefore we explored another ISM frequency, the 2.45 GHz. Thus the Wireless Energy Harvesting chapter aims to further the state of the art through the design and optimization of a novel RF harvesting board design. We demonstrated that an optimum RF-DC load is required in order to achieve high RF-DC conversion efficiency. Several rectifiers and rectennas were prototyped in order to validate the numerical studies. Finally, the results obtained in this thesis are in the forefront of the State-of-the-Art of Wireless Energy Harvesting for very low available power density
Marian, Vlad. "Transmission d'énergie sans fil : Application au réveil à distance de récepteurs en veille zéro consommation." Phd thesis, Ecole Centrale de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00787608.
Full textGok, Ahmet Baris. "Battery-less solutions enabling LoRa tracking in industrial plants." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24093/.
Full textSaddi, Zied. "Conception d'un dispositif de récupération d'énergie mixte vibratoire-électromagnétique pour l'alimentation des dispositifs à faible consommation." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1065/document.
Full textEnergy harvesting is an attractive solution to power supply low-power electronics and wireless communication devices avoiding the use of power sources like batteries which have a limited life, requires periodic replacements and have a cost of recycling. Among the available ambient energy sources, electromagnetic waves and mechanical vibrations are the most suitable because of their availability particularly in the urban areas. Our contribution focuses on the study and implementation of a vibrational energy harvesting device using the electrostatic transduction. This system, based on a capacitance modulation, requires a voltage pre-charge given by an auxiliary source. To avoid electret or piezoelectric materials characterized by a limited lifetime, the initialization step was provided by a rectenna (Rectifying antenna).A new structure of dual-band rectenna (2.45 GHz and 1.8 GHz) based on a hybrid ring has been proposed. It allows to increase the received RF power but also to simplify the matching circuit. It experimentally achieves 320 mV voltage and 40 % efficiency when the power densities are 1.13 and 1.87 mW/cm2 at 1.85 and 2.45 GHz, respectively. A Cockcroft-Walton voltage multiplier rectenna was also designed and experimentally characterized. A voltage of 1.06 V was measured at a power density of 1.55 mW/cm².A macro-scale electrostatic vibration harvester (e-VEH), wirelessly pre-charged with a 2.45 GHz Cockcroft-Walton rectenna, was studied, designed and experimentally characterized. The e-VEH uses the Bennet doubler as conditioning circuit. A voltage of 23 V across the transducer terminal has been measured when the vibration harvester is excited at 25 Hz and 1,5g of external acceleration. An energy of 275 µJ and a maximum power of 0.4 µW are available across the load. A lumped element model of the electrostatic transducer has been proposed. Based on mechanical/electrical equivalent equations, an equivalent electrical circuit is derived using the LTspice simulator to study the behavior of the system and provide the voltage and the power converted.Keywords: Energy harvesting, rectenna, microstrip antenna, RF-to-dc converter, electrostatic transduction, Bennet’s doubler, modélization
Okba, Abderrahim. "Conception et réalisation de rectennas utilisées pour la récupération d'énergie électromagnétique pour l'alimentation de réseaux de capteurs sans fils." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30286/document.
Full textThe electronic domain has known a significant expansion the last decades, all the advancements made has led to the development of miniature and efficient electronic devices used in many applications such as cyber physical systems. These systems use low-power wireless sensors for: detection, monitoring and so on. The use of wireless sensors has many advantages: * The flexibility of their location, they allow the access to hazardous areas. * The realization of lighter system, less expensive and less cumbersome. * The elimination of all the problems associated to the cables (erosion, impermeability...) * The deployment of sensor arrays. Therefore, these wireless sensors need to be supplied somehow with energy to be able to function properly. The classic ways of supplying energy such as batteries have some drawbacks, they are limited in energy and must be replaced periodically, and this is not conceivable for applications where the wireless sensor is placed in hazardous places or in places where the access is impossible. So, it is necessary to find another way to permanently provide energy to these wireless sensors. The integration and miniaturization of the electronic devices has led to low power consumption systems, which opens a way to another techniques in terms of providing energy. Amongst the possibilities, we can find the Wireless Power Transfer (WPT) and Energy Harvesting (EH). In fact, the electromagnetic energy is nowadays highly available in our planet thanks to all the applications that use wireless systems. We can take advantage of this massive available quantity of energy and use it to power-up the low power wireless sensors. This thesis is incorporated within the framework of WPT and EH. Its objective is the conception and realization of electromagnetic energy harvesters called "Rectenna" in order to supply energy to low power wireless sensors. The term "rectenna" is the combination of two words: Antenna and Rectifier. The Antenna is the module that captures the electromagnetic ambient energy and converts it to a RF signal, the rectifier is the RF circuit that converts this RF signal into a continuous (DC) signal that is used to supply the wireless sensors. In this manuscript, several rectennas will be presented, for different frequencies going from the GSM frequencies (868 MHz, 915 MHz) to the Ku/Ka bands
Jiang, Shan. "Optimum Wireless Power Transmission for Sensors Embedded in Concrete." FIU Digital Commons, 2011. http://digitalcommons.fiu.edu/etd/549.
Full textGidel, Vincent. "Contribution à la modélisation RF de diode Schottky intégrée en Technologie BiCMOS 55 nm et visant des applications sub-THz." Thesis, Université Côte d'Azur, 2020. http://www.theses.fr/2020COAZ4088.
Full textIn a world facing new challenges such as mobility or safety, the increasing demand of applications fitted to new ways of life has driven the emergence of new technology markets. The challenge twofold lies in the rise of global mobile data traffic and the design of more efficient LiDAR sensor’s systems. This dual trend has prompted research studies on millimeter-wave bands in order to contribute to the development of increasingly competitive electronics circuits. Scientific researches presented in this thesis falls within this perspective. The first part of the study deals with the development of an innovative Schottky diode architecture in BiCMOS 55 nm technology. The fabricated Schottky diodes show state-of-the-art intrinsic performance with cut-off frequencies nearby 1 THz. An analytical modeling strategy have been initiated by leveraging the architecture dimensions and physics to efficiently provide à fair agreement with the factor of merit extracted from measurements. Some of these devices are then included in two demonstrator circuits. The first one is a silicon-based subharmonic mixer operating around 106 GHz. The subharmonic mixer design relies on the collaborative use of the Schottky diode architecture and the analytical lumped model developed in BiCMOS 55nm technology. Despite a 20.3 dB conversion loss, the reception of QAM-16 demodulated signal with data rate up to 40 Gbit/s has been achieved. The second circuit concerns a unit pixel for imager applications operating at 2.5 THz. This second study also suggests a detailed strategy of the integrated antennas designed in silicon technology. This research work aims at determining the feasibility innovative circuits designed with commercially available silicon technologies in order to address 5G and LiDAR markets
Ren, Yu-Jiun. "Microwave and millimeter-wave rectifying circuit arrays and ultra-wideband antennas for wireless power transmission and communications." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1294.
Full textBouchouicha, Dhaou. "Etude de faisabilité de la récupération d'énergie électromagnétique ambiante." Thesis, Tours, 2010. http://www.theses.fr/2010TOUR4030/document.
Full textThe work of this thesis is focuse on designing, measuring and testing an antenna and rectifiercircuit (RECTENNA) optimized for incoming signals of low power density (~651W/m²). The rectenna is used to harvest the ambient electric energy from the RF signals that have been radiated by communication and broadcasting systems at (1GHz-3GHz) without matching circuit and the second is a narrow band (1.8GHz-1.9GHz) with a matching circuit between the antenna and the rectifier
Wijewardane, Samantha. "Assessment of Methods to Manipulate Thermal Emission and Evaluate the Quality of Thermal Radiation for Direct Energy Conversion." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4420.
Full textWang, Ce. "Study on Novel Rectifiers for Microwave Wireless Power Transfer System." Kyoto University, 2020. http://hdl.handle.net/2433/253503.
Full textAlaoui, abdallaoui Ismail. "Contribution à l'analyse CEM globale de structures et de circuits. Application aux antennes Vivaldi en présence d'un système non linéaire pour la récupération d'énergie : une approche FDTD." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMC213/document.
Full textElectronic systems are integrated into most objects that we use every day, also in different key sectors such as, automotive, railway, spacial, defense and consumer electronics... Conventional feeding techniques remain difficult to envisage in certain applications because they are limited in their autonomy energy, and they require periodic replacements and their recycling is expensive. In this mind, the wireless power transfer is a very interesting solution, less expensive and aesthetic. This solution needs to pick up the RF power transmitted through the free space by a Rectenna and convert it to a DC voltage, to feed one or several wireless devices or to increase the operating life of batteries.The high operating frequencies makes the microwave circuits faster. Frequency analysis can’t answer a number of questions in these circuits. The introduction of the temporal analysis becomes necessary to solve and answer all the problems encountered. In fact, we are interested in two complementary approaches:• Signal integrity, which represents the malfunction of the circuits due to the distortion of the signals• ElectroMagnetic Compatibility, which is the result of the congestion of the electronic components in the circuits.• The first approach is based on component models and can perfectly predict signal quality during placement and routing of electronic boards. On the other hand, it will be difficult to highlight the causes of the abnormal behavior of the circuit. The second approach, is complementary of the first one, which is the analysis by the electromagnetic compatibility, who will allow to cover the causes of the problems such as cross talk, radiation and defined the susceptibility of this systems to work correctly.The working method adopted in this thesis consists in first identifying the various problems. Then propose solutions via existing calculation codes (FDTD, FEM, MoM ...) who can be developed or via the software such as Spice, Matlab, EMPro, ADS …Key words: Wireless power transfer, UWB systems, numerical methods, Rectenna systems, RF/DC converter, EMC analysis
Essakhi, Brahim. "Modélisation électromagnétique 3D sur une large bande de fréquences par combinaison d'une méthode d'éléments finis et d'une approximation par fractions rationnelles : application aux structures rayonnantes." Paris 11, 2005. http://www.theses.fr/2005PA112151.
Full textThe tools for digital simulation know an intensive use in the resolution of the problems of CEM. One of the reasons is that the increasing complexity of the problems to be studied makes the experimentation difficult to realize. Moreover, measurements cannot be made that in a restricted number of points of space. The finite element method has the advantages of easily being able to take into account complex geometries and heterogeneous mediums. It uses a grid in conformity, which adapts to the geometry of the analyzed structure and which allows local refinements in the areas where variations of the physical properties, geometrical or of the fields are more significant. A temporal formulation allows the analysis of problems directly in the field of time. A frequential formulation results in solving a linear system for each frequency of study. In many applications, the electromagnetic quantities must be given on a broad frequency band and the linear system must be solved for each frequency of interest. This involves a cost of significant calculation. An alternative consists in seeking an approximation of the solution in the form of a development in series or of a rational fraction. A possible approach consists in developing the solution in Taylor series around a centre frequency. The interval of convergence of the series is limited but it is possible to extend this interval of validity while resorting to a rational approximation of Padé. The approximation of Chebyshev is an other method based on rational approximation, it consists in seeking an interpolation of the solution
Lacroux, Fabrice. "Contribution à la modélisation d'éléments localisés pour les simulations électromagnétiques en transitoire : Application en millimétrique et au transport d'énergie sans fil." Limoges, 2005. http://aurore.unilim.fr/theses/nxfile/default/b0c5314e-251a-454a-a365-a395d8c2b349/blobholder:0/2005LIMO0001.pdf.
Full textThis work has enabled to define new possibilities for the LE-FDTD algorithm (Lumped Element – Finite Difference Time Domain), and use it on two original applications. The first one allows to represent a distributed passive structure with its equivalent impedance. In this way, this work underscore parasitic phenomenon which are present with the insertion of the lumped elements into the FDTD meshgrid. Then, a solution is proposed to compensate them. As result, a transition from a microstrip line to a coaxial line is replaced by its equivalent impedance until 80GHz. The second application is dedicated to the reception system used in a wireless power transmission. This system has been studied in a global electromagnetic simulation (antenna, rectifier and load) in order to take all couplings and radiations into account. So, this global approach permits to determinate the conversion efficiency of such a system
Fantuzzi, Marco. "Progetto elettromagnetico di antenne per tag eco-compatibili a banda ultra-larga." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5969/.
Full textMichelon, Dino. "UHF energy harvester in CMOS technology." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4322.
Full textOne of the challenges of the Internet of Things and, more in general, of every wireless sensor network is to provide electrical power to every single one of its smart nodes. A typical solution uses batteries but various major concerns reduce the long-term feasibility of this approach (limited lifetime, maintenance and replacement costs, and environmental footprint).This thesis develops a possible solution based on the wireless transmission of power. A complete RF harvester composed of an antenna, a UHF rectifier and a step-up voltage converter is presented. This system captures electromagnetic waves and converts them to a stable DC voltage to supply power to common logic circuits like microcontrollers and sensors. The lack of an internal battery provides an extended flexibility, especially when its replacement is not a viable option (ex. implanted devices, large number of nodes, dangerous environments, etc.). An in-depth study of integrated Schottky and CMOS UHF rectifiers is carried out; various topologies and optimizations are analyzed. Moreover, the use of an additional step-up converter is proposed in order to increase the system output voltage; an early discrete implementation and a final, more compact, integrated version are discussed and tested. These developments lead to a complete system capable of potentially powering an application with an off-the-shelf microcontroller
Celesin, Michael Enoch. "Application and Characterization of Self-Assembled Monolayers In Hybrid Electronic Systems." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4875.
Full textValenta, Christopher Ryan. "Microwave-energy harvesting at 5.8 GHz for passive devices." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52295.
Full textOlgun, Ugur. "Efficient Microwave Energy Harvesting Technology and its Applications." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1348776239.
Full textKrishnan, Subramanian. "Thin film metal-insulator-metal tunnel junctions for millimeter wave detection." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002759.
Full textBerges, Romain. "Dispositif conformable de récupération d'énergie radiofréquence : vers l'autonomie des objets communicants." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0117/document.
Full textElectronics has undergone an unquestionable evolution in recent years. The progress made gives more efficient circuits and smaller, but especially more and more energy efficient. This evolution, combined with advances in the digital and IT domain, has enabled the expansion of Internet of Things (IoT) applications based on the massive deployment of autonomous wireless communicating sensors. The first generations of sensor could only work during the time of discharge of their battery. One of the proposed ways to extend the autonomy of objects is to use the ambient energy. Several technologies have been developed to optimize the energy harvesting depending on the environment of the sensor. The work of this thesis allows developing RF energy harvesters in three steps. The first part studies antennas structures compatible with the energy harvesting. Each antenna is optimized to either recover more energy or better integrate into the environment. The second step focuses on the RF / DC conversion circuit. The study of different circuits architectures, diodes and number of stages potentially relevant for our application, allowed realising circuits able to work with our antennas. Each circuit was then optimized to increase its conversion efficiency and its sensitivity. The final step was to assemble an antenna with a rectifier to characterize the complete harvester according two different scenarios: opportunistic energy harvesting and energy transfer conditions
Vandelle, Erika. "Exploration de solutions antennaires et de formation passive de faisceaux pour la récupération et le transfert d’énergie sans fil." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAT060.
Full textWireless energy harvesting (WEH) of ambient or intentional electromagnetic power sources of frequency ranging from 100 MHz to 10 GHz, has appeared as a promising solution to develop self-powered electronics in the past decades. However, the low power densities available, usually lower than 1 uW.cm-2, result in a limited RF-to-DC conversion efficiency and sensitivity of the energy harvesting system (rectenna) and the ambient signal diversities (unknown and time-varying direction of arrival, polarization) prohibit the use of directive antennas.In this thesis, the power combination techniques of Radio Frequency (RF) or Direct Current (DC) power in multi-antenna WEH systems, together with original structures, are investigated to address those challenges. Besides, a new Figure-of-Merit (harvesting capability) for rectennas operating in ambient scenarios is derived with probabilistic terms representing the frequency, polarization and spatial diversities of ambient signals.The first part of this thesis focuses on the design of efficient antenna and rectenna elements. Eco-responsible and low-cost prototypes are proposed by using a paper substrate along with an original strategy for the reduction of the losses.In the second part of this work, the rectification efficiency of a WEH system is enhanced through the combination of the RF power prior to the rectification process, without reduction of the spatial coverage. For this, a 3D multidirectional structure of scanning antenna arrays using passive beam-forming networks is designed to obtain a multidirectional high gain aggregate pattern. This radar-inspired solution involving Butler matrices results in a highly efficient RF-to-DC power conversion along with an optimal angular coverage, which leads to a harvesting capability higher than the state-of-the-art.The last part of this work addresses the limited sensitivity of the RF combination technique compared to that obtained with the series DC combination technique thanks to a reconfigurable system. To this end, modular rectenna unit cells are designed to form a scalable and adaptative interferometric beam-forming network, which offers the possibility to achieve a highly efficient and sensitive WEH system. This solution is suitable for low-power energy harvesting, autonomous passive tracking or RFID applications
Brunel, Damien. "Nano-antennes plasmoniques avec des diodes moléculaires rectifiantes pour la captation d'énergie et la photodétection : synthèse de dérivés de ferrocène par chimie click fonctionnant comme diodes moléculaires pour application rectenna." Electronic Thesis or Diss., Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0267.
Full textThe sun is an unlimited source of power and seems to be a perfect solution for the fight against global warming. However, this last years, the efficiencies associated to the photovoltaic technologies are moderate (< 50 %). Considering the wave–particle duality, it is possible to use the wave properties of the light in order to produce electricity. Such object called rectenna solar cells was described theoretically in the 70s. The rectenna consists in the association of an antenna with a diode. Experimental realisation of rectenna was impossible in the 70's. Recently innovative design of rectenna solar cells at IM2NP was developed. The diode element in such design was not deeply studied. The subject of this PhD is the synthesis and characterisation of these diodes. It is ferrocene based molecular diodes, so where the molecules act as a diode. They are pioneering since it is possible to anchor them to two different metal surfaces in controlled way. Such control is done by a reaction on the metal surface. The reaction chosen belongs to the click chemistry. The subject of this PhD is the synthesis and the fabrication of molecular diode on metal surface in controlled way. First by describing the rectenna and their components. Secondly describing the tools used in the project to realize the diode. Then the different synthesis of the new ferrocene based molecular diode will be presented. Finally, the characterisation and the fabrication of the diode on real devices will be discussed. This PhD has a multidisciplinary aspect where chemists and physicists work together in order to create an object in technological rupture in technology of production of electricity
黄, 勇. "マイクロ波無線送電に適用した超広負荷範囲に対応できるレクテナの開発." Kyoto University, 2015. http://hdl.handle.net/2433/199523.
Full textAbabneh, Majdi M. "Design of Micro-Scale Energy Harvesting Systems for Low Power Applications Using Enhanced Power Management System." Scholar Commons, 2018. http://scholarcommons.usf.edu/etd/7117.
Full textIbrahim, Rony. "Focalisation des ondes électromagnétiques pour la transmission d'énergie sans fil." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI109.
Full textMost recent developments in Wireless Energy Transmission (WET) using electromagnetic (EM) waves focus on designing systems to recover the electromagnetic energy lost by common wireless systems such as Wi-Fi networks. However, the intermittent and unpredictable nature of these ambient sources makes harvesting energy critical for some applications. Hence, the WET over considerable distances using microwaves appears in this context allowing the remote wake-up and wireless powering of electronic devices in a myriad of applications that are a part of the constantly evolution of the way of life. Wireless powering of an electronic device eliminates the need of the battery, which reduces its size and cost. The work presented in this thesis belong to the WET in indoor environments field. When energy is voluntarily transmitted by microwaves, systems using continuous waves are not necessarily the most efficient. The aim of this research project is to achieve a complete WET system by focusing of EM waves at the receiver in order to increase the overall energy transfer efficiency. The studies presented during this thesis show that the time reversal technique (TR) is optimal for the focusing of EM waves. The procedure is carried out in two stages. In the first stage called \textit{learning stage}, a low energy pulse is transmitted by an emitting antenna. Another antenna placed in other location in the medium receives and records a signal made of a succession of delayed pulses, more or less attenuated, and related to reflections on the environment. In a second stage called \textit{focusing stage}, a high-energy signal constructed from the time reversal of the recorded signal is transmitted by one of the antennas. Using this technique, it results that the temporally inverted signal focuses spatio-temporally on the receiving antenna in the form of a Pulsed Wave (PW). These properties are particularly important for the WET. At the receiver circuit, the \textit{rectenna} (rectifying antenna) is the device for capturing and converting focused PW to DC voltage. In this research project, we introduce a novel rectenna design based on Schottky diodes with a current-doubler topology designed, developed and optimized to ensure optimum conversion performance of PW. Experimental measurements demonstrate good performance predicted by the design procedure. Moreover, the performances obtained are perfectly distinct from those found in the state of the art, making this work an innovation in WET domain
Kanoun, Mariem. "Contribution à l'étude et à la conception d'un système de transfert et de récupération d'énergie électromagnétique à 5.8 GHZ." Thesis, Poitiers, 2019. http://www.theses.fr/2019POIT2310.
Full textThe work presented in this thesis is a contribution to the design of a Wireless Power Transfer system (WPT) as a reliable source to supply “Wireless Sensor Network” (WSN). The beamforming concept is used to efficiently transfer the energy wirelessly by focusing the radiation pattern toward each sensor forming the WSN. In the first part of this work, the design and the implementation of a fully integrated active phase shifter, in a BiCMOS SiGe:C 0,25 µm technology, for beamforming was presented. This phase shifter is based on an original architecture using an Injection-Locked Oscillator (ILO) associated with an in-phase/quadrature (IQ) modulator.The circuit was manufactured and the measurement results show a continuously controlled 360° phase shiftrange. Applied to each element of the antenna array, this phase shifter covers the entire beam-scanning range of the radiation pattern. In the second part, the design and implementation of an RF energy harvester system at 5.8 GHz is presented. After detailing the design methodology of the rectifier circuit in microstrip technology, the prototype was manufactured, measured and validated. Finally, the "rectenna" was combined to a commercial power management circuit to supply a resistive load emulating the behaviour of a sensor. The complete WPT system was tested experimentally in the laboratory and excellent performances are demonstrated
Peter, Thomas. "Optically transparent UWB antenna for wireless application & energy harvesting." Thesis, Brunel University, 2012. http://bura.brunel.ac.uk/handle/2438/7024.
Full textHaboubi, Walid. "Développements de circuits Rectennae bi-polarisation, bi-bande pour la récupération et conversion d’énergie électromagnétique à faible niveau." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1089/document.
Full textImproving energy autonomy of communication systems constitutes one of the major concerns for their massive deployment in our environment. We want to make these electronic devices (sensors and sensor networks) completely autonomous, avoiding the embedded energy sources that require replacement operations or periodic charging. Among the available energy sources that can be harvested, there are electromagnetic waves. The device that can capture this energy and convert it into useful DC power is called Rectenna (Rectifying antenna), combining antenna with diode-based rectifier. In recent few years, rectennas have reached a significant number of papers in the literature. The main challenge consists in improving performances in term of efficiency, in an attempt to overcome the electromagnetic wave attenuation and the low available field level. According to this context, this PhD work supported by the ANR project REC-EM has taken place. In this study, we have developed, designed and characterized planar structures that have interesting properties:- In term of orthogonal polarizations, so energy harvesting becomes feasable regardless the arbitrary orientation of the incident wave on the rectenna. A dual-circularly polarized rectenna at 2.45 GHz with dual-access will be set up to overcome the 3 dB power loss in the case of linearly-polarized incident wave with unknown orientation.- In term of multiple resonances, so the amount of total RF power collected by the antenna can be increased and consequently the converted DC power level can also be improved. A dual-frequency rectenna (1.8 and 2.45 GHz) with single access will be designed, as well as a rectenna based upon a dual-frequency antenna array.- In term of size compactness by avoiding the use of the HF filter between the antenna and the rectifier for all developed rectenna structures during this work. In all cases, it will be necessary to define the most suitable rectifier topology to each antenna and select, if it is appropriated, the optimum DC recombination technique to overcome the effects of RF power imbalance that may occur between the different antenna accesses. Besides, single-diode circuits will be designed and fulfilled for each structure. Finally, we will miniaturize the dual-circularly polarized dual-access antenna, and exploit it to power a LCD display temperature sensor. To enhance the DC voltage level required to activate the sensor, a DC-DC converter is inserted between the rectenna and the sensor. Such energy management device should be able to operate under low delivered DC power. Two converters will be used. The first one is developed by Ampere Lab at Ecole Centrale de Lyon and SATIE Lab at ENS Cachan. This converter was the subject of another dissertation also supported by the ANR under the REC-EM project
Zhou, Yuwei. "Contribution à la récupération de l'énergie électromagnétique ambiante pour les objets communicants autonomes." Nantes, 2013. http://archive.bu.univ-nantes.fr/pollux/show.action?id=1662e015-4123-47ef-a212-53bb99182204.
Full textThe research works of this thesis are focused on the ambient electromagnetic energy harvesting to improve the life time of wireless autonomous devices. The waves produced by cellular telephones, Wireless Internet and also radio and television transmissions may be captured and rectified to produce a continuous voltage able to supply mobile phones, environment data sensors, computers, etc. Broadband or multiband antennas, combined to a high frequency rectifying circuits with Schottky diodes must be optimized for the reception and rectifying of a very low level electromagnetic power (about a few micro watts per cm2). In this thesis, an important optimization work is done in frequency domain and especially in power domain. The high frequency circuit simulator ADS and high frequency electromagnetic simulator HFSS, are used to design the rectenna. The obtained conversion efficiencies place our laboratory in the international state of the art in electromagnetic energy harvesting