نتایج جستجو برای: atmospheric electromagnetic wave propagation

تعداد نتایج: 443429  

Journal: :Optics express 2016
Theodore Stenmark R C Word R Könenkamp

Photoemission Electron Microscopy (PEEM) is a versatile tool that relies on the photoelectric effect to produce high-resolution images. Pulse lasers allow for multi-photon PEEM where multiple photons are required excite a single electron. This non-linear process can directly image the near field region of electromagnetic fields in materials. We use this ability here to analyze wave propagation ...

2008
Iwo Bialynicki-Birula

This article contains a review of an alternative theory of squeezing, based entirely on the wave function description of the squeezed states. Quantum field theoretic approach is used to describe the squeezing of the electromagnetic field in its most complete form that takes into account temporal and spatial characteristics of the squeezed state. An analog of the Wigner function for the full ele...

2005
Gang Bao G. W. Wei Shan Zhao

A wavelet-collocation scheme, constructed from the discrete singular convolution (DSC) is introduced for computational electromagnetics. The basic philosophy behind the DSC algorithm is studied. Four test problems, including waveguide analysis in both regular and irregular domains, electromagnetic wave scattering, electrostatic field estimation via potential functions, and electromagnetic wave ...

2010
A. G. Shalashov

The impedance technique, also known as the particular case of the invariant embedding approach, is generalized for modeling of electromagnetic wave propagation in the anisotropic and gyrotropic media with spatial dispersion such as hot magnetized plasmas. That provides a new way for analytical and numerical studies of “full wave” problems in plasma physics that require exact solutions of Maxwel...

2017
I. Barba A. Grande A.C.L. Cabeceira A. Gómez J. A. Pereda J. Represa

As part of the present wave of interest in electromagnetic propagation in complex materials (left-handed, chiral, nonreciprocal, nonlinear, etc.), a special mention may be made to bi-iso‐ tropic materials. After a period of relevance during the nineties [1-4], nowadays they enjoy a renewed interest, because of new fabrication techniques that allow the use of mature tech‐ nologies (printed or in...

1999
Robert Gibson David Norris Ted Farrell

Infrasound propagation models and upper-atmospheric characterizations have been integrated into a single software tool kit that allows for user-friendly model execution and data visualization. The tool kit, called InfraMAP, for Infrasonic Modeling of Atmospheric Propagation, can be applied to predict travel times, bearings, and amplitudes from potential event locations worldwide. Temporal and s...

2001
Drago Hercog

1 Drago Hercog, University of Ljubljana, Faculty of Electrical Engineering, Tržaška 25, SI-1000 Ljubljana, Slovenia, [email protected] Abstract  Physical phenomenon of wave propagation is intrinsically difficult to understand. The animation of analytical results can greatly improve student's understanding of them. This paper presents our experience in preparation and presentation of el...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه 1377

the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...

2016
Alexander P. Nickolaenko Yuri. P. Galuk Masashi Hayakawa

We introduce the vertical profile of atmospheric conductivity in the range from 2 to 98 km. The propagation constant of extremely low frequency (ELF) radio waves was computed for this profile by using the full wave solution. A high correspondence is demonstrated of the data thus obtained to the conventional standard heuristic model of ELF propagation constant derived from the Schumann resonance...

Journal: :J. Comput. Physics 2006
Andrei G. Borisov Sergei V. Shabanov

Maxwell’s equations for propagation of electromagnetic waves in dispersive and absorptive (passive) media are represented in the form of the Schrödinger equation i∂Ψ/∂t = HΨ, where H is a linear differential operator (Hamiltonian) acting on a multi-dimensional vector Ψ composed of the electromagnetic fields and auxiliary matter fields describing the medium response. In this representation, the ...

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