Electromagnetic Scattering by a Linearly Oscillating Target
Electromagnetic Scattering by a Linearly Oscillating Target

Author: Ralph E. Kleinman

Publisher:

Published: 1975

Total Pages: 44

ISBN-13:

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A theoretical analysis is presented in this report which shows that when a plane electromagnetic wave is incident upon a perfectly conducting, linearly oscillating, arbitrarily shaped target, the scattered far field differs only in phase from the field scattered when the target is motionless. The explicit form of the phase modulation factor is derived to an accuracy of the order of v/c, where v and c are the velocities of target motion and electromagnetic waves respectively. Spectral analysis of the modulation shows that the power distribution varies with the shape of the motion, wavelength of the incident field, and magnitude of the projections of the oscillation in the incident and receiver directions. Power spectra are calculated for square, triangular, and sinusoidal periodic target motion as well as a superposition of two sinusoids of different frequency and amplitude. The results indicate that even small amplitude oscillations produce measurable modulations of the scatter field. (Author).

Electromagnetic Scattering by Particles and Particle Groups
Electromagnetic Scattering by Particles and Particle Groups

Author: Michael I. Mishchenko

Publisher: Cambridge University Press

Published: 2014-04-24

Total Pages: 470

ISBN-13: 1139867121

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This self-contained and accessible book provides a thorough introduction to the basic physical and mathematical principles required in studying the scattering and absorption of light and other electromagnetic radiation by particles and particle groups. For the first time the theories of electromagnetic scattering, radiative transfer, and weak localization are combined into a unified, consistent branch of physical optics directly based on the Maxwell equations. A particular focus is given to key aspects such as time and ensemble averaging at different scales, ergodicity, and the physical nature of measurements afforded by actual photopolarimeters. Featuring over 120 end-of-chapter exercises, with hints and solutions provided, this clear, one-stop resource is ideal for self-study or classroom use, and will be invaluable to both graduate students and researchers in remote sensing, physical and biomedical optics, optical communications, optical particle characterization, atmospheric physics and astrophysics.

Relativity and Engineering
Relativity and Engineering

Author: Jean van Bladel

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 414

ISBN-13: 3642691986

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The main feature of this book is the emphasis on "practice". This approach, unusual in the relativistic literature, may be clarified by quoting some problems discussed in the text: - the analysis of rocket acceleration to relativistic velocities - the influence of gravitational fields on the accuracy of time measurements - the operation of optical rotation sensors - the evaluation of the Doppler spectrum produced by the linear (or ro- tional) motion of an antenna or scatterer - the use of the Cerenkov effect in the design of millimeter-wave power generators - the influence of the motion of a plasma on the transmission of electrom- netic waves through this medium. A correct solution of these (and analogous) problems requires the use of re lativistic principles. This remark remains valid even at low velocities, since first-order terms in (v/c) often playa fundamental role in the equations. The "applicational" approach used in the text should be acceptable to space engineers, nuclear engineers, electrical engineers, and more generally, ap plied physicists. Electrical engineers, in particular, are concerned with re lativity by way of the electrodynamics of moving bodies. This discipline is of decisive importance for power engineers, who are confronted with problems such as - the justification of a forcing function (-D~/Dt) in the circuit equation of a moving loop - a correct formulation of Maxwell's equations in rotating coordinate systems - the resolution of "sliding contact" paradoxes - a theoretically satisfying analysis of magnetic levitation systems.

Theory and Approach of Information Retrievals from Electromagnetic Scattering and Remote Sensing
Theory and Approach of Information Retrievals from Electromagnetic Scattering and Remote Sensing

Author: Ya-Qiu Jin

Publisher: Springer Science & Business Media

Published: 2006-07-10

Total Pages: 393

ISBN-13: 140204030X

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Advances in space-borne remote sensing have significantly changed the mankind viewpoint how to observe our own Earth planet. Great amount of remote sensing data and images presents new resources to quantitatively describe and monitor our Earth environment, atmosphere, oceanic and land surfaces. In remote sensing, electromagnetic (EM) scattering, emission and wave propagation, as interaction with the Earth environment, lay the physical basis for understanding and extracting geoscientific information. Study of electromagnetic waves with remote sensing application has become an active and interdisciplinary area. This book presents some new progress on the theoretical and numerical approaches for information retrieval of the remote sensing via EM scattering and emission. We begin in Chapter 1 with the vector radiative transfer (VRT) theory for inhomogeneous scatter media. The VRT takes account of multiple scattering, emission and propagation of random scatter media, and quantitatively leads to insights of elucidating and understanding EM wave-terrain surface interaction. Meanwhile, it is extensively applicable to carrying out data interpretation and validation, and to solving the inverse problem, e.g. iteratively, physically or statistically. In Chapter 1, iterative solutions of multiple scattering and emission from inhomogeneous dense scatter media, and inhomogeneous non-spherical scatter media are discussed. Three-dimensional VRT equation (3D-VRT) for spatially inhomogeneous random scatter media for high resolution observation is also investigated. The polarimetric imagery of synthetic aperture radar (SAR) technology is one of most important advances in space-borne microwave remote sensing during recent decades.

Trends in Electromagnetism
Trends in Electromagnetism

Author: Victor Barsan

Publisher: BoD – Books on Demand

Published: 2012-03-23

Total Pages: 305

ISBN-13: 9535102672

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Among the branches of classical physics, electromagnetism is the domain which experiences the most spectacular development, both in its fundamental and practical aspects. The quantum corrections which generate non-linear terms of the standard Maxwell equations, their specific form in curved spaces, whose predictions can be confronted with the cosmic polarization rotation, or the topological model of electromagnetism, constructed with electromagnetic knots, are significant examples of recent theoretical developments. The similarities of the Sturm-Liouville problems in electromagnetism and quantum mechanics make possible deep analogies between the wave propagation in waveguides, ballistic electron movement in mesoscopic conductors and light propagation on optical fibers, facilitating a better understanding of these topics and fostering the transfer of techniques and results from one domain to another. Industrial applications, like magnetic refrigeration at room temperature or use of metamaterials for antenna couplers and covers, are of utmost practical interest. So, this book offers an interesting and useful reading for a broad category of specialists.