Results 171 to 180 of about 3,039,671 (230)

Propagation of Radio Waves

1978
We summarized in Chapter I the character of the interaction with the atmosphere of that part of the electromagnetic spectrum capable of exciting transitions in individual neutral molecules. Longer wavelengths in the electromagnetic spectrum (microwaves) do not correspond to any strong interaction, whence a large transparent ‘window’ put to good use by ...
Alain Giraud, Michel Petit
openaire   +1 more source

Solar Scintillation Effects on the Deep Space Communication Performance for Radio Wave Propagation Through Non-Kolmogorov Turbulence

IEEE Antennas and Wireless Propagation Letters, 2018
Solar scintillation refers to the rapid amplitude fluctuations of the radio signal passing through large-scale coronal irregularities. In this letter, the scintillation index model is first derived to characterize radio wave propagation in coronal ...
Guan-Jun Xu, Zhaohui Song
semanticscholar   +1 more source

A Hybrid TDPE/FDTD Method for Site-Specific Modeling of O2I Radio Wave Propagation

IEEE Antennas and Wireless Propagation Letters, 2018
A hybrid time-domain parabolic equation/finite-difference time-domain (FDTD) method for site-specific modeling of outdoor-to-indoor (O2I) radio wave propagation is presented in this letter.
Ju Feng, Liang Zhou, Xiao-Min Xu, C. Liao   +3 more
semanticscholar   +1 more source

The Propagation of Radio Waves

1985
This book is concerned with the ionosphere and the magnetosphere, and the theory of their effect on radio waves. It includes accounts of some mathematical topics now widely used in this study, particularly W. K. B. approximations, Airy integral functions and integration by steepest descents.
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The propagation of radio waves

Institution of Electrical Engineers - Proceedings of the Wireless Section of the Institution, 1926
The paper gives the results obtained from a systematic study of the received intensities of various long-wave transmitting stations at four receiving stations over a period of nearly two years.The weekly averages of the results are studied, and it is shown that they are inconsistent with any law of steady decay.
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Radio Wave Propagation in the Heliosphere

Physica Scripta, 1987
The propagation of radio waves in the heliosphere is controlled by largescale structures and small-scale inhomogeneities of the interplanetary electron density. We review some recent observations of propagation effects due to these features: intensity scintillation of cosmic radio sources and scattering of interplanetary type III radio bursts.
S Hoang, J L Steinberg
openaire   +1 more source

Learning-Based Prediction Method for Radio Wave Propagation Using Images of Building Maps

IEEE Antennas and Wireless Propagation Letters, 2022
Kazuya Inoue, K. Ichige, Tatsuya Nagao, Takahiro Hayashi   +3 more
semanticscholar   +1 more source

The Role of the Ionosphere in Radio Wave Propagation

Transactions of the American Institute of Electrical Engineers, 1939
WHEN Marconi electrified the world in 1901 by sending radio signals across the Atlantic Ocean, he incidentally proved that the upper atmosphere is electrified. Diffraction was insufficient to explain the bending of the electromagnetic waves around the 30 degrees of the earth's curved surface. The waves could not penetrate the earth.
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The Propagation of Radio Waves in an Ionised Atmosphere

Mathematical Proceedings of the Cambridge Philosophical Society, 1931
Larmor has shown that if the upper atmosphere contains electrons (charge ε, mass m, density ν) and if collisions between these electrons and molecules—and also the forces between the electrons themselves—are negligible, then electric waves are propagated as if the dielectric constant of the medium were reduced by , from which it appears that, so long ...
openaire   +2 more sources

Propagation of Radio Waves

2022
Anatoly Ivanovich Kozlov, Yuri Grigoryevich Shatrakov, Dmitry Alexandrovich Zatuchny   +2 more
openaire   +1 more source