Properties of Electro‐magnetic Waves in Plasma

Near-field effects in radiative transfer refer to the collective influence of interference, diffraction, and tunneling of electro-magnetic waves on energy transfer between two or more objects. Most studies of near-field radiative transfer have so far focused on the enhancement due to tunneling of surface polaritons. In this work, we show the existence of sharp peaks in the radiative transfer spectrum between two spheres of polar materials that are not due to surface polaritons. The peaks, which are present on either side of the restrahlen band, are because of Mie resonances.

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The Diffraction of Transient Electro-Magnetic Waves by a Wedge

Proceedings of the Edinburgh Mathematical Society ◽

10.1017/s0013091500010774 ◽

1958 ◽

Vol 11 (2) ◽

pp. 95-103 ◽

Cited By ~ 1

Author(s):

A. C. Butcher ◽

J. S. Lowndes

Keyword(s):

Wave Equation ◽

Time Dependence ◽

Half Plane ◽

Line Source ◽

Time Dependent ◽

Dimensional Case ◽

Two Dimensional ◽

Electro Magnetic ◽

Infinite Wedge ◽

Magnetic Waves

Much of the work on the theory of diffraction by an infinite wedge has been for cases of harmonic time-dependence. Oberhettinger (1) obtained an expression for the Green's function of the wave equation in the two dimensional case of a line source of oscillating current parallel to the edge of a wedge with perfectly conducting walls. Solutions of the time-dependent wave equation have been obtained by Keller and Blank (2), Kay (3) and more recently by Turner (4) who considered the diffraction of a cylindrical pulse by a half plane.

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XXIII. Electro-Magnetic Waves and Cathode Rays

Half-Hours with Great Scientists ◽

10.3138/9781487595531-026 ◽

1948 ◽

pp. 474-489

Keyword(s):

Electro Magnetic ◽

Magnetic Waves

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Directional propagation channel estimation and analysis in urban environment with panoramic photography

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078711001139 ◽

2012 ◽

Vol 4 (1) ◽

pp. 3-13 ◽

Cited By ~ 1

Author(s):

Jean-Marc Conrat ◽

Patrice Pajusco

Keyword(s):

Channel Estimation ◽

Urban Environment ◽

Noise Level ◽

Three Dimensional ◽

Direction Of Arrival ◽

Channel Modeling ◽

Propagation Channel ◽

Physical Understanding ◽

Electro Magnetic ◽

Magnetic Waves

This article aims to provide readers with a physical understanding of the propagation channel that is complementary to mathematical channel modeling. It presents an analysis of the directional propagation channel based on radiophotos. Radiophotos are graphical objects where directions of arrival are superimposed on three-dimensional (3D) panoramic photographs. The interaction between electro magnetic waves and the environment is immediately identified with these representations. This paper focuses on the direction of arrival at mobile in an urban macrocell environment. The first radiophoto collection illustrates the major propagation phenomena such as reflection, diffraction, or street canyoning. The second collection illustrates typical propagation channel profiles that are classified according to delay, azimuth, and elevation spread values. The paper also describes an original panorama-based method for estimating noise level in the azimuth–elevation domain.

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