Results 21 to 30 of about 28,237 (308)
Complex analysis of pre-seismic geoacoustic and electromagnetic emission signals [PDF]
E3S Web of Conferences, 2019 The article describes the results of complex analysis of pre-seismic signals of electromagnetic and geoacoustic radiation. We analyzed the frequency content of single sferics and geoacoustic impulses recorded before the Zhupanov earthquake that occurred ...
Lukovenkova Olga +3 more
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Tidal Structures in the Mesosphere and Lower Thermosphere and Their Solar Cycle Variations
Atmosphere, 2022 We studied the correlations between the migrating and non-migrating tides and solar cycle in the mesosphere and lower thermosphere (MLT) regions between 60° S and 60° N, which are in LAT-LON Earth coordinates, by analyzing the simulation datasets from ...
Ruidi Sun +3 more
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The exact theory for scattering of waves by thick holes in a slab and other objects with non-separable geometries [PDF]
, 2011 The theory for scattering of electromagnetic waves is developed for scattering objects for which the natural modes of the field inside the object do not couple one-to-one with those outside the scatterer.
B. J. Hoenders +2 more
core +1 more source
Research on small-scale structures of ice particle density and electron density in the mesopause region [PDF]
Annales Geophysicae, 2019 The formation of ice particle density irregularities with a meter scale in the mesopause region is explored in this paper by developing a growth and motion model of ice particles based on the motion equation of a variable mass object.
R. Tian +12 more
doaj +1 more source
Earth, Planets and Space, 2019 Spread-F is known as the electron density inhomogeneous structures in F layer of ionosphere and can usually be classified as frequency spread-F (FSF) and range spread-F (RSF).
Ning Wang +6 more
doaj +1 more source
Electromagnetic Wave Propagation for Industry and Biomedical Applications [PDF]
, 2022 This book highlights original research and high-quality technical briefs on electromagnetic wave propagation, radiation, and scattering, and their applications in industry and biomedical engineering.
core +2 more sources
Design of Low-Profile Frequency-Selective Rasorbers Based on Three-Legged Loaded Element
International Journal of Antennas and Propagation, 2020 A novel low-profile dual-polarization frequency-selective rasorber (FSR) with a transmissive window in the absorption band is proposed in this paper. Based on the equivalent circuit model (ECM), the principles of the impedance design are theoretically ...
Yu Qiang +3 more
doaj +1 more source
Radio-Wave Propagation and Electromagnetic Surface Waves [PDF]
Proceedings of the National Academy of Sciences, 1947 A Discrepancy and Its Resolution. - The problem of the propagation of radio-waves along the surface of the (plane) earth was first treated in a celebrated paper by A. Sommerfeld (1909).(1) Let the (r, φ)-plane of a cylindric system of coordinates coincide with the plane of the earth surface and let the z-axis point vertically upward.
openaire +3 more sources
Advances in Materials Science and Engineering, 2015 An equalizer based on multilayered half mode substrate integrated waveguide (HMSIW) structures with high Q-factor, low loss, and compact size is proposed for the first time.
Shuxing Wang +4 more
doaj +1 more source
Spread-F occurrences and relationships with foF2 and h′F at low- and mid-latitudes in China
Earth, Planets and Space, 2018 Ionospheric irregularities are an important phenomenon in scientific studies and applications of radio-wave propagation. Spread-F echoes in ionograms are a type of high-frequency band irregularities that include frequency spread-F (FSF), range spread-F ...
Ning Wang +4 more
doaj +1 more source