Relevant bibliographies by topics / Numerical modelling of electromagnetic wave propagation

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Numerical modelling of electromagnetic wave propagation'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Numerical modelling of electromagnetic wave propagation.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Numerical modelling of electromagnetic wave propagation"

1

Lu, Jie, Yuguo Li, and Zhijun Du. "Fictitious wave domain modelling and analysis of marine CSEM data." Geophysical Journal International 219, no. 1 (2019): 223–38. http://dx.doi.org/10.1093/gji/ggz288.

Full text
Abstract:
SUMMARY Modelling marine controlled-source electromagnetic (CSEM) responses in the fictitious time domain is a novel approach, which facilitates the full exploration of EM diffusive properties in the fictitious wave domain (FWD). Concepts, such as reflections, refractions, diffractions and transmissions, which are used for the analysis of elastic wave propagation can thus be adopted in FWD for interpreting CSEM data. In this paper, we use a high-order finite difference time domain (FDTD) algorithm for modelling marine CSEM responses in both the fictitious time domain and the diffusive frequency domain. A complex frequency shifted perfectly matched layer (CFS–PML) boundary condition is adopted to the FDTD modelling. We demonstrate the performance of the CFS–PML boundary condition and validate the high-order FDTD code in the FWD with the half-space sea water model and in the frequency domain with the 1-D canonical reservoir model. We investigate and analyse the propagation characteristics of electromagnetic fields in the FWD, where we apply wave propagation concepts to interpret marine CSEM data. Similarities between wave and field propagations relevant for marine CSEM data are demonstrated through several 1-D to 3-D numerical examples.
APA, Harvard, Vancouver, ISO, and other styles
2

BAL, GUILLAUME, and OLIVIER PINAUD. "IMAGING USING TRANSPORT MODELS FOR WAVE–WAVE CORRELATIONS." Mathematical Models and Methods in Applied Sciences 21, no. 05 (2011): 1071–93. http://dx.doi.org/10.1142/s0218202511005258.

Full text
Abstract:
We consider the imaging of objects buried in unknown heterogeneous media. The medium is probed by using classical (e.g. acoustic or electromagnetic) waves. When heterogeneities in the medium become too strong, inversion methodologies based on a microscopic description of wave propagation (e.g. a wave equation or Maxwell's equations) become strongly dependent on the unknown details of the heterogeneous medium. In some situations, it is preferable to use a macroscopic model for a quantity that is quadratic in the wave fields. Here, such macroscopic models take the form of radiative transfer equations also referred to as transport equations. They can model either the energy density of the propagating wave fields or more generally the correlation of two wave fields propagating in possibly different media. In particular, we consider the correlation of the two fields propagating in the heterogeneous medium when the inclusion is absent and present, respectively. We present theoretical and numerical results showing that reconstructions based on this correlation are more accurate than reconstructions based on measurements of the energy density.
APA, Harvard, Vancouver, ISO, and other styles
3

Rucka, Magdalena, and Jacek Lachowicz. "Numerical and experimental analysis of electromagnetic field propagation for ground penetrating radar inspection." Budownictwo i Architektura 13, no. 2 (2014): 307–15. http://dx.doi.org/10.35784/bud-arch.1909.

Full text
Abstract:
This paper presents experimental tests by using the GPR method and numerical analysis of electromagnetic field propagation. The object of the experimental research was a ground floor structure. An antenna of frequency of emitted waves equal to 2 GHz was used for measurements. The paper also describes the numerical modelling of electromagnetic field with the use of the finite difference time domain method. Results of propagation of electromagnetic waves in a one-dimensional reinforced concrete specimen were presented.
APA, Harvard, Vancouver, ISO, and other styles
4

Smolkin, Eugene. "NUMERICAL METHOD FOR ELECTROMAGNETIC WAVE PROPAGATION PROBLEM IN A CYLINDRICAL INHOMOGENEOUS METAL DIELECTRIC WAVEGUIDING STRUCTURES." Mathematical Modelling and Analysis 22, no. 3 (2017): 271–82. http://dx.doi.org/10.3846/13926292.2017.1306809.

Full text
Abstract:
The propagation of monochromatic electromagnetic waves in metal circular cylindrical dielectric waveguides filled with inhomogeneous medium is considered. The physical problem is reduced to solving a transmission eigenvalue problem for a system of ordinary differential equations. Spectral parameters of the problem are propagation constants of the waveguide. Numerical results are found with a projection method. The comparison with known exact solutions (for particular values of parameters) is made.
APA, Harvard, Vancouver, ISO, and other styles
5

Barba, Ismael, Álvaro Gómez, Ana C. L. Cabeceira, José Represa, Ángel Vegas, and Miguel A. Solano. "Numerical study of electromagnetic wave propagation through layered structures with chiral media." International Journal of Numerical Modelling: Electronic Networks, Devices and Fields 23, no. 6 (2009): 411–24. http://dx.doi.org/10.1002/jnm.742.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Smolkin, Eugene, and Yury Smirnov. "NONLINEAR PROPAGATION OF LEAKY TE-POLARIZED ELECTROMAGNETIC WAVES IN A METAMATERIAL GOUBAU LINE." Mathematical Modelling and Analysis 26, no. 3 (2021): 372–82. http://dx.doi.org/10.3846/mma.2021.13077.

Full text
Abstract:
Propagation of leaky TE-polarized electromagnetic waves in the Goubau line (a perfectly conducting cylinder covered by a concentric dielectric layer) filled with nonlinear metamaterial medium is studied. The problem is reduced to the analysis of a nonlinear integral equation with a kernel in the form of the Green function of an auxiliary boundary value problem on an interval. The existence of propagating nonlinear leaky TE waves for the chosen nonlinearity (Kerr law) is proved using the method of contraction. For the numerical solution, a method based on solving an auxiliary Cauchy problem (a version of the shooting method) is proposed. New propagation regimes are discovered.
APA, Harvard, Vancouver, ISO, and other styles
7

Tikhov, S. V., and D. V. Valovik. "Perturbation of nonlinear operators in the theory of nonlinear multifrequency electromagnetic wave propagation." Communications in Nonlinear Science and Numerical Simulation 75 (August 2019): 76–93. http://dx.doi.org/10.1016/j.cnsns.2019.03.020.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

ALEXANDROV, OLEG, and GIULIO CIRAOLO. "WAVE PROPAGATION IN A 3-D OPTICAL WAVEGUIDE." Mathematical Models and Methods in Applied Sciences 14, no. 06 (2004): 819–52. http://dx.doi.org/10.1142/s0218202504003465.

Full text
Abstract:
In this paper we study the problem of electromagnetic wave propagation in a 3-D optical fiber. The goal is to obtain a solution for the time-harmonic field caused by a source in a cylindrically symmetric waveguide. The geometry of the problem, corresponding to an open waveguide, makes the problem challenging. To solve it, we construct a transform theory which is a nontrivial generalization of a method for solving a 2-D version of this problem given by Magnanini and Santosa.3 The extension to 3-D is made complicated by the fact that the resulting eigenvalue problem defining the transform kernel is singular both at the origin and at infinity. The singularities require the investigation of the behavior of the solutions of the eigenvalue problem. Moreover, the derivation of the transform formulas needed to solve the wave propagation problem involves nontrivial calculations. The paper provides a complete description on how to construct the solution to the wave propagation problem in a 3-D optical waveguide with cylindrical symmetry. A follow-up article will study the particular cases of a step-index fiber and of a coaxial waveguide. In those cases we will obtain concrete formulas for the field and numerical examples.
APA, Harvard, Vancouver, ISO, and other styles
9

Lakhliai, Z., D. Chenouni, C. Benoit, et al. "Numerical study of electromagnetic wave propagation in twisted birefringent layers by the spectral moments method." Modelling and Simulation in Materials Science and Engineering 4, no. 6 (1996): 597–611. http://dx.doi.org/10.1088/0965-0393/4/6/004.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Räbinä, Jukka, Lauri Kettunen, Sanna Mönkölä, and Tuomo Rossi. "Generalized wave propagation problems and discrete exterior calculus." ESAIM: Mathematical Modelling and Numerical Analysis 52, no. 3 (2018): 1195–218. http://dx.doi.org/10.1051/m2an/2018017.

Full text
Abstract:
We introduce a general class of second-order boundary value problems unifying application areas such as acoustics, electromagnetism, elastodynamics, quantum mechanics, and so on, into a single framework. This also enables us to solve wave propagation problems very efficiently with a single software system. The solution method precisely follows the conservation laws in finite-dimensional systems, whereas the constitutive relations are imposed approximately. We employ discrete exterior calculus for the spatial discretization, use natural crystal structures for three-dimensional meshing, and derive a “discrete Hodge” adapted to harmonic wave. The numerical experiments indicate that the cumulative pollution error can be practically eliminated in the case of harmonic wave problems. The restrictions following from the CFL condition can be bypassed with a local time-stepping scheme. The computational savings are at least one order of magnitude.
APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic "Numerical modelling of electromagnetic wave propagation"

1

Pelgur, Ali. "Modelling Of X-band Electromagnetic Wave Propagation." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608830/index.pdf.

Full text
Abstract:
Calculation of electromagnetic wave propagation over irregular terrain is an important problem in many applications such as coverage calculations for radars or communication links. Many different approaches to this problem may be found in the literature. One of the most commonly used methods to solve electromagnetic boundary value problems is the Method of Moments (MoM). However, especially at high frequencies, the very large number of unknows required in the MoM formulation, limits the applicability of this method, since the memory requirement and the operation count increases by O(N2) and O(N3), respectively, where N is the number of the unknowns. Several approaches have been proposed in the literature to reduce the memory requirement and the operation count of the MoM. These approaches rely on the special structure of the impedance matrix generated by the MoM. The Conjugate Gradient (CG) method is a non stationary iterative technique that can be used to solve general asymmetric/non-Hermitian systems with an operational cost of O(N2) per iteration. Furthermore, the computational time can be improved by the Fast Fourier Transform (FFT) algorithm to perform the matrix vector multiplication that appear in any iterative technique. This approach has been successfully used in the literature to solve scattering from electrically large objects and it has been shown that the computational cost and memory requirement can be reduced to O(KNlogN) with K being the number of iterations. In this thesis, CG method accelerated with Fast Fourier Transform (CG FFT) method is applied to the problem of electromagnetic propagation over irregular terrain. Applications for electrically large rough terrain profiles are presented. The accuracy of the method is compared to the direct solution of the MoM, CG method and Free Space model with recoveries by Hata model or multiple knife-edge diffraction and reflection. The solution works on quasi-planar surfaces and profiles with small deviation like little breezy sea surface properly.
APA, Harvard, Vancouver, ISO, and other styles
2

Häggblad, Jon. "Boundary and Interface Conditions for Electromagnetic Wave Propagation using FDTD." Licentiate thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-25744.

Full text
Abstract:
Simulating electromagnetic waves is of increasing importance, for example, due to the rapidly growing demand of wireless communication in the fields of antenna design, photonics and electromagnetic compatibility (EMC). Many numerical and asymptotic techniques have been developed and one of the most common is the Finite-Difference Time-Domain (FDTD) method, also known as the Yee scheme. This centered difference scheme was introduced by Yee in 1966. The success of the Yee scheme is based on its relatively high accuracy, energy conservation and superior memory efficiency from the staggered form of defining unknowns. The scheme uses a structured Cartesian grid, which is excellent for implementations on modern computer architectures. However, the structured grid results in loss of accuracy due to general geometry of boundaries and material interfaces. A natural challenge is thus to keep the overall structure of Yee scheme while modifying the coefficients in the algorithm near boundaries and interfaces in order to improve the overall accuracy. Initial results in this direction have been presented by Engquist, Gustafsson, Tornberg and Wahlund in a series of papers. Our contributions are new formulations and extensions to higher dimensions. These new formulations give improved stability properties, suitable for longer simulation times. The development of the algorithmsis supported by rigorous stability analysis. We also tackle the problem of controlling the divergence free property of the solution—which is of extra importance in three dimensions—and present results of a number of numerical tests.<br>QC 20101101
APA, Harvard, Vancouver, ISO, and other styles
3

Moss, Christopher D. Q. (Christopher Doniert Q. ). 1973. "Numerical methods for electromagnetic wave propagation and scattering in complex media." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/26909.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.<br>Vita.<br>Includes bibliographical references (p. 227-242).<br>Numerical methods are developed to study various applications in electromagnetic wave propagation and scattering. Analytical methods are used where possible to enhance the efficiency, accuracy, and applicability of the numerical methods. Electromagnetic induction (EMI) sensing is a popular technique to detect and discriminate buried unexploded ordnance (UXO). Time domain EMI sensing uses a transient primary magnetic field to induce currents within the UXO. These currents induce a secondary field that is measured and used to determine characteristics of the UXO. It is shown that the EMI response is difficult to calculate in early time when the skin depth is small. A new numerical method is developed to obtain an accurate and fast solution of the early time EMI response. The method is combined with the finite element method to provide the entire time domain response. The results are compared with analytical solutions and experimental data, and excellent agreement is obtained. A fast Method of Moments is presented to calculate electromagnetic wave scattering from layered one dimensional rough surfaces. To facilitate the solution, the Forward Backward method with Spectral Acceleration is applied. As an example, a dielectric layer on a perfect electric conductor surface is studied. First, the numerical results are compared with the analytical solution for layered flat surfaces to partly validate the formulation. Second, the accuracy, efficiency, and convergence of the method are studied for various rough surfaces and layer permittivities. The Finite Difference Time Domain (FDTD) method is used to study metamaterials exhibiting both negative permittivity and permeability in certain frequency bands.<br>(cont.) The structure under study is the well-known periodic arrangement of rods and split-ring resonators, previously used in experimental setups. For the first time, the numerical results of this work show that fields propagating inside the metamaterial with a forward power direction exhibit a backward phase velocity and negative index of refraction. A new metamaterial design is presented that is less lossy than previous designs. The effects of numerical dispersion in the FDTD method are investigated for layered, anisotropic media. The numerical dispersion relation is derived for diagonally anisotropic media. The analysis is applied to minimize the numerical dispersion error of Huygens' plane wave sources in layered, uniaxial media. For usual discretization sizes, a typical reduction of the scattered field error on the order of 30 dB is demonstrated. The new FDTD method is then used to study the Angular Correlation Function (ACF) of the scattered fields from continuous random media with and without a target object present. The ACF is shown to be as much as 10 dB greater when a target object is present for situations where the target is undetectable by examination of the radar cross section only.<br>by Christopher D. Moss.<br>Ph.D.
APA, Harvard, Vancouver, ISO, and other styles
4

Oliveira, Filipa Simoes De Brito Ferreira De. "Numerical modelling of irregular wave propagation in the nearshore region." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266424.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Hamdan, Nawras. "Two-dimensional numerical modelling of wave propagation in soil media." Thesis, Heriot-Watt University, 2013. http://hdl.handle.net/10399/2675.

Full text
Abstract:
Wave propagation in soil media is encountered in many engineering applications. Given that the soil is unbounded, any numerical model of finite size must include absorbing boundary conditions implemented at the artificial boundaries of the domain to allow waves to radiate away to infinity. In this work, a finite element model is developed under plane strain conditions to simulate the effects of harmonic loading induced waves. The soil can be homogeneous or multi-layered where the soil properties are linear elastic. It may overlay rigid bedrock or half-space. It may also incorporate various discontinuities such as foundations, wave barriers, embankments, tunnels or any other structure. For the case of soil media over rigid bedrock, lateral wave radiation is ensured through the implementation of the consistent transmitting boundaries, using the Thin Layer Method (TLM), which allow replacing the two semi-infinite media, on the left and right of a central domain of interest, by equivalent nodal forces simulating their effect. Those are deduced from an eigenvalue problem formulated in the two semi-infinite lateral media. In the case of soil media over half-space, the Thin Layer Method is combined to the Paraxial Boundary Conditions to allow the incoming waves to radiate away to infinity laterally and in-depth. The performance of this coupled model is enhanced by incorporating a buffer layer between the soil medium and the underlain half-space. For extensive analyses, the eigenvalue problem related to the TLM may become computationally demanding, especially for soil media with multi-wavelength depths. As the TLM involves thin sub-layers, in comparison to the wavelength, the size of the eigenvalue problem increases with increasing depth. A modified version of the TLM is proposed in this work to reduce the computational effort of the related eigenvalue problem. This dissertation work led to the development of a Fortran computer code capable of simulating wave propagation in two-dimensional soil media models with either structured or unstructured triangular mesh grids. This latter option allows considering soil-structure problems with geometrical complexities, different soil layering configurations and various loading conditions. The pre- and post-processing as well as the analysis stages are all user friendly and easy.
APA, Harvard, Vancouver, ISO, and other styles
6

Chen, Yi. "Propagation and Excitation of Electromagnetic Modes for Travelling-wave MRI Applications." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449158025.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Bokaris, Jack. "Physical and numerical modelling of irregular wave propagation in coastal waters." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394373.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Torrens, Richard. "Numerical modelling of shock wave propagation through a layer of porous medium." Thesis, Brunel University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342392.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Lavoué, François. "Inversion des formes d'ondes électromagnétiques en 2D pour le géoradar : vers une imagerie multi-paramètre à partir des données de surface." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENU050/document.

Full text
Abstract:
Les premiers mètres à centaines de mètres de la proche surface terrestre sont le siège de processus naturels dont la compréhension requiert une caractérisation fine de la subsurface, via une estimation quantifiée de ses paramètres. Le géoradar est un outil de prospection indirecte à même d'ausculter les milieux naturels et d'en estimer les propriétés électriques (permittivité et conductivité). Basé sur la propagation d'ondes électromagnétiques à des fréquences allant du MHz à quelques GHz, le géoradar est utilisé à des échelles et pour des applications variées concernant la géologie, l'hydrologie ou le génie civil. Dans ce travail de thèse, je propose une méthode d'imagerie quantitative des propriétés électriques sur des sections 2D de la subsurface, à partir de données radar acquises à la surface du sol. La technique mise en oeuvre est l'inversion des formes d'ondes, qui utilise l'intégralité du champ d'ondes enregistré.Dans une première partie, je présente les principes physiques et l'outil de modélisation numérique utilisés pour simuler la propagation des ondes électromagnétiques dans les milieux hétérogènes à deux dimensions. Pour cela, un algorithme de différences finies en domaine fréquentiel développé dans le cadre des ondes visco-acoustiques est adapté au problème électromagnétique 2D grâce à une analogie mathématique.Dans une deuxième partie, le problème d'imagerie est formulé sous la forme d'une optimisation multi-paramètre puis résolu avec l'algorithme de quasi-Newton L-BFGS. Cet algorithme permet d'estimer l'effet de la matrice Hessienne, dont le rôle est crucial pour la reconstruction de paramètres de différents types comme la permittivité et la conductivité. Des tests numériques montrent toutefois que l'algorithme reste sensible aux échelles utilisées pour définir ces paramètres. Dans un exemple synthétique représentatif de la proche surface, il est cependant possible d'obtenir des cartes 2D de permittivité et de conductivité à partir de données de surface, en faisant intervenir des facteurs d'échelle et de régularisation visant à contraindre les paramètres auxquelles l'inversion est la moins sensible. Ces facteurs peuvent être déterminés en analysant la qualité de l'ajustement aux données, sans hypothèse a priori autre que la contrainte de lissage introduite par la régularisation.Dans une dernière partie, la méthode d'imagerie est confrontée à deux jeux de données réelles. Dans un premier temps, l'examen de données expérimentales permet de tester la précision des simulations numériques vis-à-vis de mesures effectuées en environnement contrôlé. La connaissance des cibles à imager permet en outre de valider la méthodologie proposée pour l'imagerie multiparamètre dans des conditions très favorables puisqu'il est possible de calibrer le signal source et de considérer l'espace libre environnant les cibles comme modèle initial pour l'inversion.Dans un deuxième temps, j'envisage le traitement d'un jeu de données radar multi-offsets acquises au sein d'un massif calcaire. L'interprétation de ces données est rendue beaucoup plus difficile par la complexité du milieu géologique environnant, ainsi que par la méconnaissance des caractéristiques précises des antennes utilisées. L'application de la méthode d'inversion des formes d'ondes à ces données requiert donc une étape préliminaire impliquant une analyse de vitesse plus classique, basée sur les arrivées directes et réfléchies, et des simulations numériques dans des modèles hypothétiques à même d'expliquer une partie des données. L'estimation du signal source est effectuée à partir d'arrivées sélectionnées, simultanément avec des valeurs moyennes de conductivité et de hauteur d'antennes de façon à reproduire au mieux les amplitudes observées. Un premier essai d'inversion montre que l'algorithme est capable d'expliquer les données dans la gamme de fréquences considérée et de reconstruire une ébauche des principaux réflecteurs<br>The quantitative characterization of the shallow subsurface of the Earth is a critical issue for many environmental and societal challenges. Ground penetrating radar (GPR) is a geophysical method based on the propagation of electromagnetic waves for the prospection of the near subsurface. With central frequencies between 10~MHz and a few GHz, GPR covers a wide range of applications in geology, hydrology and civil engineering. GPR data are sensitive to variations in the electrical properties of the medium which can be related, for instance, to its water content and bring valuable information on hydrological processes. In this work, I develop a quantitative imaging method for the reconstruction of 2D distributions of permittivity and conductivity from GPR data acquired from the ground surface. The method makes use of the full waveform inversion technique (FWI), originating from seismic exploration, which exploits the entire recorded radargrams and has been proved successful in crosshole GPR applications.In a first time, I present the numerical forward modelling used to simulate the propagation of electromagnetic waves in 2D heterogeneous media and generate the synthetic GPR data that are compared to the recorded radargrams in the inversion process. A frequency-domain finite-difference algorithm originally developed in the visco-acoustic approximation is adapted to the electromagnetic problem in 2D via an acoustic-electromagnetic mathematical analogy.In a second time, the inversion scheme is formulated as a fully multiparameter optimization problem which is solved with the quasi-Newton L-BFGS algorithm. In this formulation, the effect of an approximate inverse Hessian is expected to mitigate the trade-off between the impact of permittivity and conductivity on the data. However, numerical tests on a synthetic benchmark of the literature display a large sensitivity of the method with respect to parameter scaling, showing the limits of the L-BFGS approximation. On a realistic subsurface benchmark with surface-to-surface configuration, it has been shown possible to ally parameter scaling and regularization to reconstruct 2D images of permittivity and conductivity without a priori assumptions.Finally, the imaging method is confronted to two real data sets. The consideration of laboratory-controlled data validates the proposed workflow for multiparameter imaging, as well as the accuracy of the numerical forward solutions. The application to on-ground GPR data acquired in a limestone massif is more challenging and necessitates a thorough investigation involving classical processing techniques and forward simulations. Starting permittivity models are derived from the velocity analysis of the direct arrivals and of the reflected events. The estimation of the source signature is performed together with an evaluation of an average conductivity value and of the unknown antenna height. In spite of this procedure, synthetic data do not reproduce the observed amplitudes, suggesting an effect of the radiation pattern of the shielded antennae. In preliminary tests, the inversion succeeds in fitting the data in the considered frequency range and can reconstruct reflectors from a smooth starting model
APA, Harvard, Vancouver, ISO, and other styles
10

Wilson, Glenn Andrew, and glenn wilson@griffith edu au. "Plane Wave Propagation Problems in Electrically Anisotropic and Inhomogeneous Media with Geophysical Applications." Griffith University. School of Microelectronic Engineering, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030325.210206.

Full text
Abstract:
Boundary value problems required for modelling plane wave propagation in electrically anisotropic and inhomogeneous media relevant to the surface impedance methods in electromagnetic geophysics are formally posed and treated. For a homogeneous TM-type wave propagating in a half space with both vertical and horizontal inhomogeneities where the TM-type wave is aligned with one of the elements of the conductivity tensor, it is shown using exact solutions that the shearing term in the homogeneous Helmholtz equation for inclined anisotropic media: [Equation 1], unequivocally vanishes and solutions need only be sought to the homogeneous Helmholtz equation for biaxial media: [Equation 2]. This implies that those problems posed with an inclined uniaxial conductivity tensor can be identically stated with a fundamental biaxial conductivity tensor, provided that the conductivity values are the reciprocal of the diagonal terms from the Euler rotated resistivity tensor: [Equation 3], [Equation 4], [Equation 5]. The applications of this consequence for numerical methods of solving arbitrary two-dimensional problems for a homogeneous TM-type wave is that they need only to approximate the homogeneous Helmholtz equation and neglect the corresponding shearing term. The self-consistent impedance method, a two-dimensional finite-difference approximation based on a network analogy, is demonstrated to accurately solve for problems with inclined uniaxial anisotropy using the fundamental biaxial anisotropy equivalence. The problem of a homogeneous plane wave at skew incidence upon an inclined anisotropic half space is then formally treated. In the half space, both TM- and TE-type waves are coupled and the linearly polarised incident TM- and TE-type waves reflect TE- and TM-type components. Equations for all elements of the impedance tensor are derived for both TM- and TE-type incidence. This offers potential as a method of predicting the direction of anisotropic strike from tensor impedance measurements in sedimentary environments.
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Numerical modelling of electromagnetic wave propagation"

1

Levy, M. Parabolic equation methods for electromagnetic wave propagation. Institution of Electrical Engineers, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

International Conference on Mathematical and Numerical Aspects of Wave Propagation Phenomena (1st 1991 Strasbourg, France). Mathematical and numerical aspects of wave propagation phenomena. Society for Industrial and Applied Mathematics, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

International Conference on Mathematical and Numerical Aspects of Wave Propagation (2nd 1993 Newark, Del.). Second International Conference on Mathematical and Numerical Aspects of Wave Propagation. Society for Industrial and Applied Mathematics, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

International Conference on Mathematical and Numerical Aspects of Wave Propagation (5th 2000 Santiago de Compostela, Spain). Fifth International Conference on Mathematical and Numerical Aspects of Wave Propagation. Society for Industrial and Applied Mathematics, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

International, Conference on Mathematical and Numerical Aspects of Wave Propagation (3rd 1995 Mandelieu-la-Napoule France). Third International Conference on Mathematical and Numerical Aspects of Wave Propagation. Society for Industrial and Applied Mathematics, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Sasiela, Richard J. Electromagnetic wave propagation in turbulence: Evaluation and application of Mellin transforms. 2nd ed. SPIE, 2007.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Sasiela, Richard J. Electromagnetic wave propagation in turbulence: Evaluation and application of Mellin transforms. 2nd ed. SPIE Press, 2007.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Sasiela, Richard J. Electromagnetic wave propagation in turbulence: Evaluation and application of Mellin transforms. Springer-Verlag, 1994.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

International, Conference on Mathematical and Numerical Aspects of Wave Propagation (6th 2003 Jyväskylä Finland). Mathematical and numerical aspects of wave propagation: WAVES 2003 : proceedings of the Sixth International Conference on Mathematical and Numerical Aspects of Wave Propagation, held at Jyväskylä, Finland, 30 June-4 July 2003. Springer, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

1941-, DeSanto J. A., and International Conference on Mathematical and Numerical Aspects of Wave Propagation, eds. Mathematical and numerical aspects of wave propagation. Society for Industrial and Applied Mathematics, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Numerical modelling of electromagnetic wave propagation"

1

Buldakov, Eugeny. "Wave Propagation Models for Numerical Wave Tanks." In Advanced Numerical Modelling of Wave Structure Interactions. CRC Press, 2020. http://dx.doi.org/10.1201/9781351119542-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Abrahams, I. David, and Gregory A. Kriegsmann. "Electromagnetic Wave Propagation Through Small Diameter Tube Bundles." In Mathematical and Numerical Aspects of Wave Propagation WAVES 2003. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55856-6_67.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Urbach, H. Paul. "Spectral Theory of Resonances in Electromagnetic Gratings." In Mathematical and Numerical Aspects of Wave Propagation WAVES 2003. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55856-6_133.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Laghrouche, Omar, Peter Bettess, and Jon Trevelyan. "Three Dimensional Plane Wave Basis Finite Elements for Short Wave Modelling." In Mathematical and Numerical Aspects of Wave Propagation WAVES 2003. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55856-6_121.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Ayari, Mohamed Yassine, Arnaud Coatanhay, and Ali Khenchaf. "Electromagnetic Propagation in Troposphere: Inverse Problem Using Optimization Approaches." In Mathematical and Numerical Aspects of Wave Propagation WAVES 2003. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55856-6_89.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Kemm, Friedemann, Claus-Dieter Munz, Rudolf Schneider, and Eric Sonnendrücker. "Divergence Corrections in the Numerical Sim-ulation of Electromagnetic Wave Propagation." In Hyperbolic Problems: Theory, Numerics, Applications. Birkhäuser Basel, 2001. http://dx.doi.org/10.1007/978-3-0348-8372-6_14.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Martikainen, Janne, Tuomo Rossi, Kevin Rogovin, and Jari Toivanen. "Fast Direct Solver for a Time-harmonic Electromagnetic Problem with an Application." In Mathematical and Numerical Aspects of Wave Propagation WAVES 2003. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55856-6_109.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Collino, Francis, M’Barek Fares, and Houssem Haddar. "On the Validation of the Linear Sampling Method in Electromagnetic Inverse Scattering Problems." In Mathematical and Numerical Aspects of Wave Propagation WAVES 2003. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55856-6_105.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Adamson, Peep. "Numerical Analysis of Transverse Localization of Radiation in Freely Propagating Electromagnetic Bessel Beams." In Mathematical and Numerical Aspects of Wave Propagation WAVES 2003. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55856-6_49.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Chaigne, Antoine. "Challenges and Requirements in the Modelling of Musical Instruments." In Mathematical and Numerical Aspects of Wave Propagation WAVES 2003. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55856-6_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Numerical modelling of electromagnetic wave propagation"

1

Vukovic, Ana, Ella Bekker, Bobo Hu, Phillip Sewell, and Trevor Benson. "Modelling Electromagnetic Wave Propagation through Time-Varying Media: Comparison of Analytical and Numerical Methods." In 2006 International Conference on Transparent Optical Networks. IEEE, 2006. http://dx.doi.org/10.1109/icton.2006.248228.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Clarissa, Albuquerque Detomi, S. Curet, and L. Boillereaux. "MICROWAVE PROCESSING OF FOOD SAMPLES: INFLUENCE OF CAVITY DESIGN AND DIELECTRIC PROPERTIES." In Ampere 2019. Universitat Politècnica de València, 2019. http://dx.doi.org/10.4995/ampere2019.2019.9911.

Full text
Abstract:
Microwave-material interactions and electromagnetic propagation phenomena are important to optimize the microwave heating process of food samples. In this study, a 3D numerical modelling of a TE10 rectangular waveguide including microwave antenna and impedance matching elements is proposed. The microwave applicator is aimed to process both solid and liquid food samples. The model illustrates the standing wave patterns and microwave absorbed power within the cavity by taking into account the influence of the screw tuner, quartz windows, shorting plunger, and additional dielectric support plates. The results reveal the importance to consider the real cavity design and the precise dielectric characterization to predict accurate temperature profiles within the food product during the microwave heating. Such a model can be now be used to optimize the food sample geometry to achieve minimum reflected power and better heating uniformity.
APA, Harvard, Vancouver, ISO, and other styles
3

Didier, Eric, Maria Graça Neves, Luís Gil, and Conceição Fortes. "NUMERICAL MODELLING OF WAVE PROPAGATION AND WAVE BREAKING." In Proceedings of the 31st International Conference. World Scientific Publishing Company, 2009. http://dx.doi.org/10.1142/9789814277426_0022.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Junning, Pan, Zuo Qihua, and Wang Hongchuan. "NUMERICAL MODELLING OF IRREGULAR WAVE PROPAGATION IN HARBOURS." In Proceedings of the 2nd International Conference. WORLD SCIENTIFIC, 2004. http://dx.doi.org/10.1142/9789812703040_0040.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Velasco-Segura, Roberto, and Pablo L. Rendón. "Numerical modelling of nonlinear full-wave acoustic propagation." In RECENT DEVELOPMENTS IN NONLINEAR ACOUSTICS: 20th International Symposium on Nonlinear Acoustics including the 2nd International Sonic Boom Forum. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4934439.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Belov, P. A., and C. R. Simovski. "Analytical modelling of semi-infinite electromagnetic crystal's excitation by plane electromagnetic wave." In IEEE Antennas and Propagation Society Symposium, 2004. IEEE, 2004. http://dx.doi.org/10.1109/aps.2004.1330170.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Prior, M. "Underwater acoustic propagation modelling for Royal Navy applications." In IEE Colloquium on Common Modelling Techniques for Electromagnetic Wave and Acoustic Wave Propagation. IEE, 1996. http://dx.doi.org/10.1049/ic:19960360.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Paik, Joongcheol. "Numerical Modelling of Slide-induced Bore-like Wave Propagation." In The 3rd World Congress on Mechanical, Chemical, and Material Engineering. Avestia Publishing, 2017. http://dx.doi.org/10.11159/htff17.161.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Holm, P., and A. Waern. "Wave propagation over a forest - edge parabolic equation modelling vs. GTD modelling." In 2003 IEEE International Symposium on Electromagnetic Compatibility, 2003. EMC '03. IEEE, 2003. http://dx.doi.org/10.1109/icsmc2.2003.1429018.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Donnelly, M. "Underwater acoustic propagation modelling using wide angle parabolic equations." In IEE Colloquium on Common Modelling Techniques for Electromagnetic Wave and Acoustic Wave Propagation. IEE, 1996. http://dx.doi.org/10.1049/ic:19960361.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Numerical modelling of electromagnetic wave propagation"

1

Litchinitser, Natalia M. Electromagnetic Wave Propagation in Optical Guiding Structures: Numerical Modeling. Defense Technical Information Center, 2007. http://dx.doi.org/10.21236/ada483124.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Petropoulos, Peter G. Numerical Modeling and Analysis of Transient Electromagnetic Wave Propagation and Scattering. Defense Technical Information Center, 2000. http://dx.doi.org/10.21236/ada380053.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Kuo, S. P. Experiments and Numerical Simulations of Electromagnetic Wave Propagation in Plasma Varying Rapidly in Space and Time. Defense Technical Information Center, 1993. http://dx.doi.org/10.21236/ada274376.

Full text
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography