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Littérature scientifique sur le sujet « Open waveguides »

Auteur : Grafiati

Publié le 26 janvier 2024

Mis à jour le 14 décembre 2024

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Articles de revues sur le sujet "Open waveguides"

Dong, Hao, Jean-Baptiste Doc et Simon Félix. « Maximum directivity of flanged open-ended waveguides ». Journal of the Acoustical Society of America 154, n^o 1 (1 juillet 2023) : 115–25. http://dx.doi.org/10.1121/10.0020052.

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Directional beams have extensive applications in communication and sound reproduction. This paper investigates the theoretical maximum directivity of infinitely flanged open-ended waveguides and the radiation pattern synthesis. We derive a rigorous solution for the maximum directivity factor of a flanged aperture with arbitrary shape by projecting its surface velocity on the waveguide modes, enabling the creation of a directional beam in any desired direction. We present case studies for a three-dimensional circular waveguide and a bidimensional waveguide. The theoretical beam that is obtained in a subspace spanned by all the propagating modes can then be synthesized by a group of incident modes or a point-source array within the waveguide. The optimality of the beam is demonstrated by comparing it with Gaussian shaded modes radiated from the waveguide. If the evanescent modes are taken into account, the maximum directivity factor increases with considerable loss to the radiation efficiency. Nevertheless, the optimum aperture velocity dominated by its evanescent components is capable of precise beam steering in extreme directions and could be useful for designing material-filled horns. Our work provides benchmark directivity factors and patterns for the practical design of horn antennas. In addition, we present a generalized form of Bouwkamp's impedance theorem.

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Ishibashi, Akira, Tsuyoshi Kasai et Nobuo Sawamura. « Redirection Waveguide having Discrete Translational Symmetry for Photovoltaic Systems with Solar-Cell Units Placed at the Periphery ». Energies 11, n^o 12 (14 décembre 2018) : 3498. http://dx.doi.org/10.3390/en11123498.

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We have investigated a new type of redirection waveguides for concentration solar-cell systems. The solar cell units are to be placed in the peripheral region of the waveguide. The redirection waveguide converts three-dimensionally propagating (3D) photons into 2D photons that propagate in a planar waveguide which serves as the mainstream of the redirection waveguide. In this new type, the cladding layer on one side of the planar waveguide, not being spatially continuous, tangentially touches the core of the planar waveguide which, having an open geometry, is connected, through tributary waveguides, to the bottom plane where the 3D-photons come in vertically. Based on simulations, we have shown not only that good mainstream-to-mainstream propagation of light-wave can be obtained but also that the light propagation from the tributary waveguides to the mainstream is well done. We also have confirmed that light-waves from the tributary waveguides are well merged with those from the mainstream waveguide at the junction of the cores of the mainstream and the tributary waveguides. Light-waves injected from tributary waveguides propagates well in the core of the mainstream waveguide passing those junctions. The light-wave merging can be fulfilled in the waveguide with the discrete translational symmetry. Photons are shown to be well conveyed in the new waveguide losslessly for a distance of ~1 mm. The redirection waveguide is promising for the concentration photovoltaic systems with solar-cell units placed at its periphery.

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NICKELSON, L., S. ASMONTAS, V. MALISAUSKAS et R. MARTAVICIUS. « The dependence of open cylindrical magnetoactive p-Ge and p-Si plasma waveguide mode cutoff frequencies on hole concentrations ». Journal of Plasma Physics 75, n^o 1 (février 2009) : 35–51. http://dx.doi.org/10.1017/s0022377808007307.

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AbstractIn this article we give the solution of Maxwell's equations for the open circular cylindrical magnetoactive semiconductor plasma (-gyrotropy) waveguides. We describe the method that allowed us to arrive at a dispersion equation for the electrodynamical analyses of open circular cylindrical plasma (OCCP) waveguides. We numerically investigate the main and two higher modes' dispersion characteristics of p-Ge and p-Si waveguides placed in an external constant longitudinal magnetic field at several concentrations of two component hole charge carriers. We analyse the cutoff frequency and other electrodynamical characteristics of helicon modes with the left-handed (e+iϕ) circular polarization. We discover that the cutoff frequencies of the main mode and the working frequency range of OCCP p-Ge and p-Si waveguides are moving continuously towards the direction of higher frequencies when the hole concentration is increasing. We determine that the central frequency of the p-Si plasma waveguide is higher and its broadbandwidth is larger compared with the analogical p-Ge waveguide. We also numerically investigate the helicon mode cutoff frequencies of the infinitive p-Ge and p-Si plasma at several concentrations of two component hole charge carriers. We compare the cutoff frequencies of the helicon modes propagating in the infinite plasma and in the OCCP waveguides.

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Morozov, V. M., V. I. Magro et E. Yu Trakhtman. « Infinite linear waveguide antenna array with metal-dielectric structures in the "floquet channel" ». Journal of Physics and Electronics 28, n^o 1 (10 septembre 2020) : 91–96. http://dx.doi.org/10.15421/332015.

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An electrodynamics calculation is performed for an infinite waveguide antenna array in the form of open ends of waveguides, in the near zone of which a metal-dielectric structure is located. This metal-dielectric structure is located in the "Floquet channels" and is a combination of a dielectric coating over the antenna array and horns. In this case, the horns are not a continuation of the waveguides, but are located at some distance from them. The space between the waveguides and the horns is filled with a dielectric. A system of equations that allows calculating the reflection coefficients of incident waves in waveguides is obtained.

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Magro, V. I., et V. M. Morozov. « Study of a finite linear waveguide antenna array with dielectric plugs ». Journal of Physics and Electronics 30, n^o 2 (30 décembre 2022) : 75–80. http://dx.doi.org/10.15421/332223.

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A finite waveguide antenna array of open ends of the waveguides, which are surrounded by a metal screen, is under consideration. The influence of the permittivity and the height of dielectric plugs on the modulus of the reflection coefficient in waveguides of the finite antenna array is studied. Dielectric plugs with different values of permittivity are considered. It is shown that dielectric plugs effectively match the impedance of the antenna array for the case of a slight deviation of the beam from the normal to the array.

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Polat, Ersin, Henning Tesmer, Roland Reese, Matthias Nickel, Dongwei Wang, Peter Schumacher, Rolf Jakoby et Holger Maune. « Reconfigurable Millimeter-Wave Components Based on Liquid Crystal Technology for Smart Applications ». Crystals 10, n^o 5 (27 avril 2020) : 346. http://dx.doi.org/10.3390/cryst10050346.

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This paper presents recent development of tunable microwave liquid crystal (LC) components in the lower millimeter wave (mmW) regime up to the W-band. With the utilization of increasing frequency, conventional metallic waveguide structures prove to be impractical for LC-based components. In particular, the integration of the electric bias network is extremely challenging. Therefore, dielectric waveguides are a promising alternative to conventional waveguides, since electrodes can be easily integrated in the open structure of dielectric waveguides. The numerous subcategories of dielectric waveguides offer a high degree of freedom in designing smart millimeter wave components such as tunable phase shifters, filters and steerable antennas. Recent research resulted in many different realizations, which are analyzed in this paper. The first demonstrators of phased array antennas with integrated LC-based phase shifters are reviewed and compared. In addition, beam steering with a single antenna type is shown. Furthermore, the possibility to realize tunable filters using LC-filled dielectric waveguides is demonstrated.

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Kaddouri, Abdessalem, Bilel Hamdi, Mourad Aidi et Taoufik Aguili. « GLOBAL METHOD COMBINED WITH FLOQUET MODAL ANALYSIS TO MODEL AN ANTENNA BASED ON RECTANGULAR WAVEGUIDE ARRAY ». EPH - International Journal of Science And Engineering 4, n^o 2 (27 juin 2018) : 47–55. http://dx.doi.org/10.53555/eijse.v4i2.171.

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In this study, we propose a new formulation based on a global method to model a rectangular waveguide array as antenna. Our method consists to combine the method of moment (MoM), the generalized equivalent circuit method (GECM) and Floquet modal analysis. Looking for rigor, simplicity and rapidity, we repose always on the simple discontinuity in an open rectangular waveguide. So, we extended our pervious works to study in first step an infinite rectangular waveguides array and we achieve with a finite one. For validation purpose, we consider two rectangular waveguides and we compered it whit the same structure studied by direct method in our previous study. Obtained numerical results are presented and discussed. A good agreement is shown and the boundary conditions are verified.

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Divakov, Dmitriy, Anastasiia Tiutiunnik et Anton Sevastianov. « Algorithm for Numerical Solution of Diffraction Problem on the Joint of Two Open Three-Layer Waveguides ». MATEC Web of Conferences 186 (2018) : 01010. http://dx.doi.org/10.1051/matecconf/201818601010.

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This paper describes the algorithm for the numerical solution of the diffraction problem of waveguide modes at the joint of two open planar waveguides. For planar structures under consideration, we can formulate a scalar diffraction problem, which is a boundary value problem for the Helmholtz equation with a variable coefficient in two-dimensional space. The eigenmode problem for an open three-layer waveguide is the Sturm-Liouville problem for a second-order operator with piecewise constant potential on the axis, where the potential is proportional to the refractive index. The described problem is singular and has a mixed spectrum and therefore the Galerkin method can not be used in this definition. One way to adapt the Galerkin method for the problem solution is to artificially limit the area, which is equivalent to placing the open waveguide in question in a hollow closed waveguide whose boundaries are remote from the real boundaries of the waveguide layer of the open waveguide. Thus, we obtain a diffraction problem on a finite interval and with a discrete spectrum, which can be solved by the projection method, as done in this paper.

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Pochernyaev, V. N., et N. M. Syvkova. « EXTERNAL PARAMETERS OF THE CONNECTION OF A RECTANGULAR WAVEGUIDE PARTIALLY FILLED OF LINEAR DIELECTRIC WITH A RECTANGULAR WAVEGUIDE PARTIALLY FILLED OF NONLINEAR DIELECTRIC ». Visnyk Universytetu “Ukraina”, n^o 1 (28) 2020 (2020) : 100–105. http://dx.doi.org/10.36994/2707-4110-2020-1-28-09.

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. In the article, the external parameters of the connection of a rectangular waveguide partially filled of linear dielectric with a rectangular waveguide partially filled of a nonlinear dielectric are determined. Knowledge of the external parameters of such a connection ensures the design of devices with open nonlinear elements. Promising microwave paths of radio engineering systems based on rectangular waveguides partially filled of dielectric include a wide variety of active and passive microwave devices. The plane-transverse junction of these waveguides is considered for various geometric dimensions of dielectric plates and their relative permittivity. Such a junction is characterized by reactive conductivity, which is determined through the sum of the reactive conductivities of local fields. The transverse electric field at the junction is represented through the eigenvector function of the geometric surface, which coincides with the cross section of the waveguides. The scattering matrix of the plane-transverse junction is determined through the conductivity of the sections of the two waveguides and the conductivity of the plane-transverse junction. The dependences of the traveling wave coefficient and the modulus of the reflection coefficient on the geometric dimensions of the dielectric plate are plotted taking into account the local fields generated at the plane transverse junction. At the junction of two waveguides, not only changed the geometric dimensions of the dielectric plates along the wide and narrow walls of the waveguide, but also their relative permittivity. In one case, two higher types of waves were taken into account: quasi - H30 and quasi - H12, in the other case - four higher types of waves: quasi - H30, quasi - H12, quasi - E12, quasi - H50. Calculations show that an increase in the number of higher types of waves has practically no effect on the accuracy of calculations. The results obtained indicate the rapid internal convergence of the obtained solutions and the correct choice of the transverse electric eigenvector function of rectangular waveguides partially filled of dielectric as approximate the field on the junction of two waveguides.

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Divakov, Dmitriy, Anastasiia Tiutiunnik et Anton Sevastianov. « Symbolic-Numeric Computation of the Eigenvalues and Eigenfunctions of the Leaky Modes in a Regular Homogeneous Open Waveguide ». MATEC Web of Conferences 186 (2018) : 01009. http://dx.doi.org/10.1051/matecconf/201818601009.

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In this paper the algorithm of finding eigenvalues and eigenfunctions for the leaky modes in a three-layer planar dielectric waveguide is considered. The problem on the eigenmodes of open three-layer waveguides is formulated as the Sturm-Liouville problem with the corresponding boundary and asymptotic conditions. In the case of guided and radiation modes of open waveguides, the Sturm-Liouville problem is formulated for self-adjoint second-order operators on the axis and the corresponding eigenvalues are real quantities for dielectric media. The search for eigenvalues and eigenfunctions corresponding to the leaky modes involves a number of difficulties: the boundary conditions for the leaky modes are not self-adjoint, so that the eigenvalues can turn out to be complex quantities. The problem of finding eigenvalues and eigenfunctions will be associated with finding the complex roots of the nonlinear dispersion equation. In the present paper, an original scheme based on the method of finding the minimum of a function of several variables is used to find the eigenvalues. The paper describes the algorithm for searching for eigenvalues, the algorithm uses both symbolic transformations and numerical calculations. On the basis of the developed algorithm, the dispersion relation for the weakly flowing mode of a three-layer open waveguide was calculated in the Maple computer algebra system.

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Thèses sur le sujet "Open waveguides"

Vasilevskaya, Elizaveta. « Open periodic waveguides : Theory and computation ». Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCD008/document.

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Cette thèse porte sur la propagation des ondes acoustiques dans des milieux périodiques.Ces milieux ont des propriétés remarquables car le spectre associée à l’opérateur d’ondesdans ces milieux a une structure de bandes : il existe des plages de fréquences danslesquelles les ondes monochromatiques ne se propagent pas. Plus intéressant encore, enintroduisant des défauts linéiques dans ce type de milieux, on peut créer des modes guidésà l’intérieur de ces bandes de fréquences interdites. Dans ce manuscrit nous montrons qu’ilest possible de créer de tels modes guidés dans le cas de milieux périodiques particuliersde type quadrillage : plus précisément, le domaine périodique considéré est constitué duplan R2 privé d’un ensemble infini d’obstacles rectangulaires régulièrement espacés (d’unedistance ") dans deux directions orthogonales du plan, que l’on perturbe localement endiminuant la distance entre deux colonnes d’obstacles. Les résultats sont ensuite étendusau cas 3D.Ce travail comporte un aspect théorique et un aspect numérique. Du point de vue théoriquel’analyse repose sur le fait que, comme " est petit, le spectre de l’opérateur associé ànotre problème est "proche" du spectre d’un problème posé sur le graphe obtenu commela limite géométrique du domaine quand " tend vers 0. Or, pour le graphe limite, il estpossible de calculer explicitement le spectre. Ensuite, en utilisant des méthodes d’analyseasymptotique on étudie le spectre de l’opérateur non-limite. On illustre les résultats théoriquespar des résultats numériques obtenus à l’aide d’une méthode numérique spécialementdédiée aux milieux périodiques : cette dernière est basée sur la réduction du problèmede valeurs propres initial (linéaire) posé dans un domaine non-borné à un problème nonlinéaireposé dans un domaine borné (en utilisant l’opérateur de Dirichlet-to-Neumannexact)
The present work deals with propagation of acoustic waves in periodic media. Thesemedia have particularly interesting properties since the spectrum associated with theunderlying wave operator in such media has a band-gap structure: there exist intervals offrequences for which monochromatic waves do not propagate. Moreover, by introducinglinear defects in this kind of media, one can create guided modes inside the bands offorbidden frequences. In this work we show that it is possible to create such guidedmodes in the case of particular periodic media of grid type: more precisely, the periodicdomain in question is R2 minus an infinite set of rectangular obstacles periodically spacedin two orthogonal directions (the distance between two neighbour obstacles being "),which is locally perturbed by diminishing the distance between two columns of obstacles.The results are extended to the 3D case.This work has a theoretical and a numerical aspect. From the theoretical point of view theanalysis is based on the fact that, " being small, the spectrum of the operator associatedwith our problem is "close" to the spectrum of a problem posed on a graph which is ageometric limit of the domain as " tends to 0. However, for the limit graph the spectrumcan be computed explicitly. Then, we study the spectrum of the non-limit operatorusing asymptotic analysis. Theoretical results are illustrated by numerical computationsobtained with a numerical method developed for study of periodic media: this method isbased on the reduction of the initial (linear) eigenvalue problem posed in an unboundeddomain to a non-linear problem posed in a bounded domain (using the exact Dirichletto-Neumann operator)

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McDougall, Marc J. « Infinite elements for the analysis of open dielectric waveguides ». Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=64088.

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Chang, C. S. « A rigorous analysis of cascaded step discontinuities in open waveguides ». Thesis, University of Bath, 1993. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317348.

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Law, Hong-Tat Philip. « Analysis of electromagnetic scattering by open-ended waveguides containing complex obstacles / ». The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu148768520496745.

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Ott, Julian [Verfasser], et A. [Akademischer Betreuer] Kirsch. « Halfspace Matching : a Domain Decomposition Method for Scattering by 2D Open Waveguides / Julian Ott ; Betreuer : A. Kirsch ». Karlsruhe : KIT-Bibliothek, 2017. http://d-nb.info/113602171X/34.

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Leclerc, Augustin. « Calculs de mοdes électrοmagnétiques guidés dans des guides d'οndes tοrsadés et οuverts ». Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMIR28.

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Cette thèse explore la modélisation et le calcul des modes électromagnétiques (EM) dans des guides d'ondes de géométries complexes, notamment dans des câbles électriques torsadés en milieux ouverts. L'objectif est de développer des méthodes numériques pour résoudre les équations de Maxwell afin de mieux comprendre la propagation des champs électromagnétiques dans des configurations réalistes. Cette étude est motivée par les enjeux liés à la réduction du rayonnement électromagnétique et à l'amélioration des performances des câbles en termes de confinement des champs. Nous traitons deux principales configurations : les guides d’ondes droits et les guides d'ondes torsadés. Pour les guides droits, des méthodes semi-analytiques sont mises en œuvre, notamment pour les câbles coaxiaux, permettant de tester les modèles numériques. Nous étendons ces méthodes aux guides d'ondes ouverts, où des conditions aux limites absorbantes (CLA) sont introduites pour modéliser un environnement infini en limitant les réflexions parasites. Dans les câbles torsadés, une géométrie hélicoïdale est exploitée afin de reformuler les équations de propagation des ondes EM dans un cadre numérique adapté, permettant d'obtenir des simulations en basse fréquence. Un travail sur la construction de CLA dans ce cadre a également été initié. Les résultats obtenus fournissent une meilleure compréhension des phénomènes électromagnétiques à basse fréquence et ouvrent des perspectives pour la conception de dispositifs plus performants et l'étude des systèmes électromagnétiques dans des environnements hétérogènes réels
This thesis explores the modelling and calculation of electromagnetic (EM) modes in waveguides with complex geometries, particularly in twisted electric cables in open environments. The aim is to develop numerical methods for solving Maxwell's equations in order to better understand the propagation of electromagnetic fields in realistic configurations. This study is motivated by the challenges of reducing electromagnetic radiation and improving cable performance in terms of field containment. We deal with two main configurations: straight waveguides and twisted waveguides. For straight waveguides, semi-analytical methods are used, particularly for coaxial cables, to test numerical models by comparison with precise solutions. We extend these methods to open waveguides, where absorbing boundary conditions (ABC) are introduced to model an infinite environment while limiting spurious reflections. In twisted cables, a helical geometry is exploited to reformulate the EM wave propagation equations in a suitable numerical framework, enabling low-frequency simulations to be obtained. Work on the construction of ABCs within this framework has also been initiated. The results that we obtain provide a better understanding of low-frequency electromagnetic phenomena and open up prospects for the design of more efficient devices and the study of electromagnetic systems in real heterogeneous environments

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Sibbald, Christopher L. « Open-ended waveguide structures ». Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/5576.

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Altintas, Ayhan. « Electromagnetic Scattering from a Class of Open-Ended Waveguide Discontinuities ». Connect to resource, 1986. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1208793684.

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Fitzmaurice, Michael G. « A new finite-difference time-domain method applied to an open waveguide structure ». Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/7950.

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The study makes use of a variation of the Finite-Difference Time-Domain (FDTD) method as first proposed by Yee to simulate electromagnetic field distribution and propagation in an open waveguide structure. In order to prove that this new method is valid, a reflection coefficient is calculated with simulation data and compared to measurements. The agreement between measurement and simulation data, while not exact, is enough to establish the veracity of the new method. This study contains a detailed discussion of the discrepancies which were observed. Also presented are colour images of the simulation which give the reader an idea as to the nature and level of detail of the information which can be obtained from the simulation.

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Burkholder, Robert J. « High-frequency asymptotic methods for analyzing the EM scattering by open-ended waveguide cavities / ». The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487599963593742.

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Livres sur le sujet "Open waveguides"

Burkholder, R. J. High-frequency asymptotic methods for analyzing the EM scattering by open-ended waveguide cavities. Cleveland, Ohio : National Aeronautics and Space Administration, Lewis Research Center, 1989.

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H, Pathak P., Burnside W. D et Langley Research Center, dir. Electromagnetic scattering from a class of open-ended waveguide discontinuities. Columbus, Ohio : Ohio State University, ElectroScience Laboratory, Dept. of Electrical Engineering, 1986.

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Burkholder, R. J. Analysis of the EM scattering from arbitrary open-ended waveguide cavities using axial Gaussian beam tracking. Columbus, Ohio : Ohio State University, ElectroScience Laboratory, Dept. of Electrical Engineering, 1989.

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Law, P. H. A hybrid asymptotic-modal analysis of the EM scattering by an open-ended S-shaped rectangular waveguide cavity. Columbus, Ohio : Ohio State Uniersity, ElectroScience Laboratory, Dept. of Electrical Engineering, 1989.

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Open Electromagnetic Waveguides. Institution of Engineering & Technology, 2011.

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Rozzi, T., et M. Mongiardo. Open Electromagnetic Waveguides (Ieee Electromagnetic Waves Series). Institution of Electrical Engineers, 1997.

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High-frequency asymptotic methods for analyzing the EM scattering by open-ended waveguide cavities. Cleveland, Ohio : National Aeronautics and Space Administration, Lewis Research Center, 1989.

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Chapitres de livres sur le sujet "Open waveguides"

Shestopalov, Yury, Yury Smirnov et Eugene Smolkin. « Open Waveguides of Arbitrary Cross Section ». Dans Optical Waveguide Theory, 221–58. Singapore : Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-0584-1_5.

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Qaddoumi, Nasser, Radin Mirshahi, Emarit Ranu, Vladimir Otashevich, Christian Huber, Philip Stepanek, Reza Zoughi et J. David McColskey. « Analysis of Loading vs. Microwave Fatigue Crack Detection Sensitivity using Open-Ended Waveguides ». Dans Nondestructive Characterization of Materials VIII, 311–16. Boston, MA : Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-4847-8_49.

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Weik, Martin H. « open waveguide ». Dans Computer Science and Communications Dictionary, 1149. Boston, MA : Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_12832.

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Huber, C., M. L. Peterson et J. Bourland. « Comparison of Two Electromagnetic Models for Microwave Surface Crack/Slot Detection Using Open-Ended Waveguides ». Dans Review of Progress in Quantitative Nondestructive Evaluation, 679–85. Boston, MA : Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-5947-4_89.

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Zanetto, Francesco. « Low-Noise Mixed-Signal Electronics for Closed-Loop Control of Complex Photonic Circuits ». Dans Special Topics in Information Technology, 55–64. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-85918-3_5.

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AbstractAn increasing research effort is being carried out to profit from the advantages of photonics not only in long-range telecommunications but also at short distances, to implement board-to-board or chip-to-chip interconnections. In this context, Silicon Photonics emerged as a promising technology, allowing to integrate optical devices in a small silicon chip. However, the integration density made possible by Silicon Photonics revealed the difficulty of operating complex optical architectures in an open-loop way, due to their high sensitivity to fabrication parameters and temperature variations. In this chapter, a low-noise mixed-signal electronic platform implementing feedback control of complex optical architectures is presented. The system exploits the ContactLess Integrated Photonic Probe, a non-invasive detector that senses light in silicon waveguides by measuring their electrical conductance. The CLIPP readout resolution has been maximized thanks to the design of a low-noise multichannel ASIC, achieving an accuracy better than −35 dBm in light monitoring. The feedback loop to stabilize the behaviour of photonic circuits is then closed in the digital domain by a custom mixed-signal electronic platform. Experimental demonstrations of optical communications at high data-rate confirm the effectiveness of the proposed approach.

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Huber, C., H. Abiri, S. Ganchev et R. Zoughi. « Electromagnetic Modeling of the Interaction of Cracks in Metallic Surfaces with Open-Ended Waveguides Using an Equivalent Magnetic Current ». Dans Review of Progress in Quantitative Nondestructive Evaluation, 719–26. Boston, MA : Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0383-1_94.

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Bois, Karl, Aaron Benally et Reza Zoughi. « A Multi-Mode Solution for Analysis of the Reflection Coefficient of Open-Ended Rectangular Waveguides Radiating into a Dielectric Infinite Half-Space ». Dans Review of Progress in Quantitative Nondestructive Evaluation, 705–11. Boston, MA : Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5339-7_91.

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Rambousky, R., et H. Garbe. « Analysis of Open TEM-Waveguide Structures ». Dans Ultra-Wideband, Short-Pulse Electromagnetics 10, 49–58. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-9500-0_4.

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Szałatkiewicz, Jakub, Roman Szewczyk, Eugeniusz Budny, Mateusz Kalinowski, Juhani Kataja, Peter Råback et Juha Ruokolainen. « Advances in FEM Based Modeling of Waveguide and Waveguide Systems for Microwave Applications, Using Newly Developed Open Source Software ». Dans Recent Advances in Systems, Control and Information Technology, 172–86. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48923-0_22.

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Liu, John M., et M. Allen Matteson. « Effects of Lift-Off on Microwave NDE Using an Open-Ended Rectangular Waveguide ». Dans Review of Progress in Quantitative Nondestructive Evaluation, 713–18. Boston, MA : Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0383-1_93.

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Actes de conférences sur le sujet "Open waveguides"

Troles, J., L. Szymczyk, F. Cheviré, C. Boussard-Pledel, A. Gautier, F. Charpentier, Y. Guimond, M. Roze et G. Renversez. « Microstructured optical fibers made by additive manufacturing of chalcogenide glasses ». Dans Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, JTh4A.6. Washington, D.C. : Optica Publishing Group, 2024. http://dx.doi.org/10.1364/bgpp.2024.jth4a.6.

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Chalcogenide preforms obtained by an additive manufacturing process have been drawn into chalcogenide optical fibers. Those results open a way for the elaboration of chalcogenide microstructured optical fibers, especially for hollow-core fibers.

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Cotillard, Romain, et Nicolas Roussel. « High order fiber Bragg gratings using point-by-point femtosecond laser technique ». Dans Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, BM3A.3. Washington, D.C. : Optica Publishing Group, 2024. http://dx.doi.org/10.1364/bgpp.2024.bm3a.3.

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Here we describe the inscription of high-order Bragg gratings. These optical components feature the combined properties of Bragg gratings and Fabry-Perot cavities, open new possibilities both for sensor applications and as optical components, such as wavelength references or fiber-optic verniers.

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Veremey, Vladimir, et Raj Mittra. « Open Waveguide Wideband Antennas ». Dans 2024 IEEE International Symposium on Antennas and Propagation and INC/USNC‐URSI Radio Science Meeting (AP-S/INC-USNC-URSI), 1297–98. IEEE, 2024. http://dx.doi.org/10.1109/ap-s/inc-usnc-ursi52054.2024.10686917.

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« Open waveguides ». Dans 2008 12th International Conference on Mathematical Methods in Electromagnetic Theory. IEEE, 2008. http://dx.doi.org/10.1109/mmet.2008.4581036.

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Peng, S. T. « Transitions In Open Millimeter Waveguides ». Dans 1985 Technical Symposium East, sous la direction de James C. Wiltse. SPIE, 1985. http://dx.doi.org/10.1117/12.948253.

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Das, Prosenjit, et Sudhabindu Ray. « NDT using open-ended waveguides ». Dans 2016 International Symposium on Antennas and Propagation (APSYM). IEEE, 2016. http://dx.doi.org/10.1109/apsym.2016.7929149.

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Petrescu, Camelia. « Study of Cylindrical Dielectric-Conductor Open Waveguides ». Dans 2019 International Conference on Electromechanical and Energy Systems (SIELMEN). IEEE, 2019. http://dx.doi.org/10.1109/sielmen.2019.8905819.

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Legenkiy, M., et A. Butrym. « Mode basis method for open dielectric waveguides ». Dans 2008 International Conference on Mathematical Methods in Electromagnetic Theory (MEET). IEEE, 2008. http://dx.doi.org/10.1109/mmet.2008.4581005.

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Dong, H., J. B. Doc et S. Félix. « Maximum Directivity of Flanged Open-Ended Waveguides ». Dans 10th Convention of the European Acoustics Association Forum Acusticum 2023. Turin, Italy : European Acoustics Association, 2022. http://dx.doi.org/10.61782/fa.2023.0842.

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Rajo-Iglesias, Eva, et Stefano Maci. « Broadband, compact hard waveguide and its application to open-ended waveguides dense arrays ». Dans 2012 6th European Conference on Antennas and Propagation (EuCAP). IEEE, 2012. http://dx.doi.org/10.1109/eucap.2012.6206416.

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Rapports d'organisations sur le sujet "Open waveguides"

Mitchell, Gregory, et Wasyl Wasylkiwskyj. Modal Decomposition Matrix (MDM) Method for Directly Calculating the Far Field of an Open Rectangular Waveguide with an Infinite Flange. Fort Belvoir, VA : Defense Technical Information Center, juillet 2013. http://dx.doi.org/10.21236/ada587493.

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