1 edition of **A transfer function approach to scalar wave propagation in lossy and lossless media** found in the catalog.

A transfer function approach to scalar wave propagation in lossy and lossless media

Timothy D. Merrill

- 291 Want to read
- 3 Currently reading

Published
**1987**
.

Written in English

- Electrical and computer engineering

The Physical Object | |
---|---|

Pagination | 71 p. |

Number of Pages | 71 |

ID Numbers | |

Open Library | OL25461991M |

Plane Wave Propagation in lossy dielectric medium: A lossy dielectric is a medium in which an EM wave loses power as it propagates due to poor conduction. In other words, a lossy dielectric is a partially conducting medium (imperfect dielectric or imperfect conductor) with a ¥= 0, as distinct from a lossless dielectric (perfect or good. 3 Wave Equation and its Solutions 99 Introduction 99 Time-Varying Electromagnetic Fields 99 Time-Harmonic Electromagnetic Fields Solution to the Wave Equation ; 4 Wave Propagation and Polarization Introduction Transverse Electromagnetic Modes Transverse Electromagnetic Modes in Lossy Media

Figure shows an incident wave E i propagating in a medium with permittivity ε 1, conductivity σ 1, and permeability μ wave encounters the interface between material (1) and material (2), which is a general lossy dielectric with permittivity ε 2, conductivity σ 2, and permeability μ on the definition of angle of incidence in the previous section, the incident wave hits Author: Nathan Ida. Transcranial focused ultrasound (tcFUS) is an attractive noninvasive modality for neurosurgical interventions. The presence of the skull, however, compromises the efficiency of tcFUS therapy, as its heterogeneous nature and acoustic characteristics induce significant distortion of the acoustic energy deposition, focal shifts, and thermal gain by:

Full text of "Partial wave analysis of electromagnetic wave propagation in inhomogeneous media" See other formats UARI REPORT NO. 18 PARTIAL WAVE ANALYSIS OF ELECTROMAGNETIC WAVE PROPAGATION IN INHOMOGENEOUS MEDIA by F. H. Mitchell, Jr. F. J. Tischer (ACCESSION NUMBER)"?JLL_15_ (PAOES> UIAIIA UW OK JM'x OR AD NUMBER) " This research work was . Open Resonator Microwave Sensor Systems for Industrial Gauging: A practical design approach Nathan Ida Open resonator microwave sensors allow accurate sensing, monitoring and measurement of properties such as dimension and moisture content in materials including dielectrics, rubber, polymers, paper, fabrics and wood veneers.

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Merrill, A transfer function approach to scalar wave propagation in lossy and lossless media, Master’s thesis, Naval Postgraduate School, Monterey, California, March Google Scholar [5]Author: John P. Powers, Benito Baylosis, Peter Gatchell, William Reid.

Circuit model for mode extraction in lossy/lossless photonic crystal waveguides Article (PDF Available) in Journal of the Optical Society of America B 29(1) January with Reads. Merrill, A transfer function approach to scalar wave propagation in lossy and lossless media, Master’s thesis, Naval Postgraduate School, Monterey, California, March Google Scholar [13]Author: John P.

Powers, William Reid, John G. Upton, Ray Van de Veire. Propagation of electromagnetic waves generated by modulated moving source in dispersive lossy media Article in Mathematical Methods in the Applied Sciences 38(10) June with 63 Reads. A transfer matrix function (TMF) is derived for the analysis of electromagnetic (EM) wave propagation in dielectric waveguides with arbitrary profiles, situated inside rectangular metal tubes.

Pulse propagation in porous media is usually modeled by synthesizing the signal via a Fourier transform of the continuous wave results. On th e other hand, experimental measurements are. We revisit the classical problem of electromagnetic wave refraction from a lossless dielectric to a lossy conductor, where both media are considered to be non-magnetic, linear, isotropic and.

Introduction. It is well-known that the attenuation of plane acoustic waves propagating in a wide variety of lossy media obey an empirical power law frequency dependence that, over a broad range of frequencies is well approximated by (1) α(ω)=α 0 ω n, where ω is the angular frequency, and α 0 and n are the real positive constants.

Experimental measurements on water over a very wide Cited by: Analyze the effect of a constant, uniform magnetic field B 0, parallel to the direction n of electromagnetic wave propagation, on the wave's dispersion in plasma, within the same simple model that was used in section of the lecture notes for the derivation of Eq.

Multiplicationof a Vector by a Scalar Addition and Subtraction The Dot (Scalar) Product The Cross (Vector) Product THE GRADIENT AND THE DEL OPERATOR The Gradient CurvilinearCoordinates (a) Cylindrical (b) Spherical The Line Integral FLUX AND DIVERGENCE Flux Divergence Acoustic Wave Equation.

Acoustic wave equation is defined as()∂2p∂xi2−1c2∂2p∂t2=0where p stands for fluid pressure inside the chambers, xi are spatial coordinates in Cartesian coordinate system, c is the speed of sound, and t is time.

From: Computational Modeling in Bioengineering and Bioinformatics, Related terms. Introduction. Boundary Integral Equations (BIEs) can be an effective technique for solving wave scattering problems in homogeneous media.

The partial differential equations that hold in the medium may be reformulated as an integral equation that holds on the boundary of the obstacle, thereby reducing the dimensionality of the problem and allowing unbounded homogeneous media to be modelled Author: Jonathan A.

Hargreaves, Yiu W. Lam. Now let us discuss electromagnetic wave propagation in dielectric waveguides. The conceptually simplest, step-index waveguide (see figures b and ) consists of an inner core and an outer shell (in the optical fiber technology lingo, called the cladding) with a higher wave propagation speed, i.e.

lower index of refraction. In order to model our acoustic FWs in an attenuating medium, we have to modify the language previously used by us for optical FWs propagating in lossy media, by taking in mind that, given an excitation frequency ω 0, in an acoustic absorbing medium a plane wave possesses a complex wavenumber k ¯ obeying relationship and has the complex sound Cited by: 2.

An image could be defined as a two-dimensional (2-D) function, f (x, y), where x and y are spatial (plane) coordinates, and the amplitude of f at any pair of coordinates (x, y) is called the brightness, intensity or grey the image can be processed, it needs to be digitised.

In a digital images f (i, j), i and j are integer values as shown in Fig. by: This research suggests an effective approach for image compression using Stationary Wavelet Transform (SWT) and Vector Quantization which is a Linde Buzo Gray (LBG) vector quantization in order to compressed input images in four phases; namely preprocessing, image transformation, zigzag scan, and lossy/lossless compression.

This equation is a source-free wave equation in lossless media. It is a commonly used form of the wave equation and forms the basis of the remaining chapters of this book. Equation is called the Helmholtz equation for the electric field intensity in lossless media.

In lossy media, we use : Nathan Ida. Digital Communications is a classic book in the area that is designed to be used as a senior or graduate level text.

The text is flexible and can easily be used in a one semester course or there is enough depth to cover two semesters.

Its comprehensive nature makes it a great book for students to keep for reference in their professional careers. You can write a book review and share your experiences.

Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. Presented in two parts, this book takes an analytical approach on the subject and emphasizes new ideas and applications used today.

Part one covers fundamentals of electromagnetic wave propagation, radiation, and scattering. It provides ample end-of-chapter problems and offers a page solution manual to help readers check and comprehend their. The formulation was based on the stretched-coordinate approach first proposed in and subsequently derived for scalar wave equations in.

The two solver variants were parallelized for both multi-core systems using OpenMP and GPU devices using NVIDIA’s CUDA, resulting in a speedup factor of up to 45 times in the case of the latter, in order to Cited by: Electromagnetic and Optical Pulse Propagation: Volume 1: Spectral Representations in Temporally Dispersive Media Kurt E.

Oughstun In two volumes, this book presents a detailed, systematic treatment of electromagnetics with application to the propagation of transient electromagnetic fields (including ultrawideband signals and ultrashort pulses.An electromagnetic metamaterial affects electromagnetic waves that impinge on or interact with its structural features, which are smaller than the wavelength.

To behave as a homogeneous material accurately described by an effective refractive index, its features must be much smaller than the wavelength. [citation needed]For microwave radiation, the features are on the order of millimeters.