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Готові списки джерел за темами / Open waveguides

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Статті в журналах

Добірка наукової літератури з теми "Open waveguides"

Автор: Grafiati

Опубліковано: 26 січня 2024

Оновлено: 14 грудня 2024

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Статті в журналах з теми "Open waveguides"

1

Dong, Hao, Jean-Baptiste Doc, and Simon Félix. "Maximum directivity of flanged open-ended waveguides." Journal of the Acoustical Society of America 154, no. 1 (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

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2

Ishibashi, Akira, Tsuyoshi Kasai, and Nobuo Sawamura. "Redirection Waveguide having Discrete Translational Symmetry for Photovoltaic Systems with Solar-Cell Units Placed at the Periphery." Energies 11, no. 12 (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 waveg

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3

NICKELSON, L., S. ASMONTAS, V. MALISAUSKAS, and 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, no. 1 (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 ot

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4

Morozov, V. M., V. I. Magro, and E. Yu Trakhtman. "Infinite linear waveguide antenna array with metal-dielectric structures in the "floquet channel"." Journal of Physics and Electronics 28, no. 1 (2020): 91–96. http://dx.doi.org/10.15421/332015.

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Анотація:

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 o

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5

Magro, V. I., and V. M. Morozov. "Study of a finite linear waveguide antenna array with dielectric plugs." Journal of Physics and Electronics 30, no. 2 (2022): 75–80. http://dx.doi.org/10.15421/332223.

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Анотація:

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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6

Polat, Ersin, Henning Tesmer, Roland Reese, et al. "Reconfigurable Millimeter-Wave Components Based on Liquid Crystal Technology for Smart Applications." Crystals 10, no. 5 (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 waveg

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7

Kaddouri, Abdessalem, Bilel Hamdi, Mourad Aidi, and 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, no. 2 (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 t

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8

Divakov, Dmitriy, Anastasiia Tiutiunnik, and 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 proble

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9

Pochernyaev, V. N., and 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”, no. 1 (28) 2020 (2020): 100–105. http://dx.doi.org/10.36994/2707-4110-2020-1-28-09.

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Анотація:

. 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 d

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10

Divakov, Dmitriy, Anastasiia Tiutiunnik, and 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 corresp

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