Results 21 to 30 of about 196,301 (311)
IET Microwaves, Antennas & Propagation, 2021 This study reports a class of balanced‐to‐unbalanced (BTU) and balanced‐to‐balanced (BTB) filtering rat‐race couplers (FRCs) based on multilayer substrate integrated waveguide (SIW) cavities.
Xian Wang +5 more
doaj +1 more source
Earth, Planets and Space, 2022 The most important aim in interpreting an oblique ionogram is to obtain the accurate Junction Frequencies (JFs) of the ordinary (O) and extraordinary (X) mode.
Sun FengJuan +5 more
doaj +1 more source
Analysis of ionospheric parameters during Solar events and geomagnetic storms
E3S Web of Conferences, 2016 The paper shows new methods of analysis of ionospheric and magnetic data applying the models of multicomponent constructions (MCM models) developed by the authors.
Mandrikova Oksana +3 more
doaj +1 more source
Propagation of Waves in Helical Wave Guides [PDF]
Journal of Applied Physics, 1958 The field configuration near the conductors of a helical wave guide is obtained from the solution of the spatial-wave equation for a developed helix. This solution is first obtained for the case of tape conductors and then adapted to elliptical (including circular) conductors by conformal transformation.
openaire +3 more sources
Design of a polarization selective surface for co‐channel interference suppression
Electronics Letters, 2022 In this paper, a novel design of polarization selective surface (PSS) is proposed for co‐channel interference (CCI) suppression. By establishing a switchable doublet topology, two types of second‐order filtering responses with two transmission zeros are ...
Xian Wang +4 more
doaj +1 more source
Acoustic wave propagation in the solar sub-photosphere with localised magnetic field concentration: effect of magnetic tension [PDF]
, 2009 Aims: We analyse numerically the propagation and dispersion of acoustic waves in the solar-like sub-photosphere with localised non-uniform magnetic field concentrations, mimicking sunspots with various representative magnetic field configurations ...
Shelyag, S. +14 more
core +1 more source
Finite element heterogeneous multiscale methods for the wave equation [PDF]
, 2013 Wave phenomena appear in a wide range of applications such as full-waveform seismic inversion, medical imaging, or composite materials. Often, they are modeled by the acoustic wave equation.
Stohrer, Christian
core +1 more source
E3S Web of Conferences, 2016 The results of continuous measurements of AEF potential gradient by CS110 fluxmeter at Paratunka observatory are presented.
Khomutov Sergey +3 more
doaj +1 more source
Spectral-Element Simulations of 3-D Seismic Wave Propagation and Applications to Source and Structural Inversions [PDF]
, 2006 This thesis presents a concise introduction to the spectral-element method and its applications to the simulation of seismic wave propagation in 3-D earth models.
Liu, Qinya
core +1 more source
Methods and Algorithms of Subsurface Holographic Sounding
Remote Sensing, 2022 In our experiments, we develop and test portable multi-element receiver antenna arrays, electrically scanned in order to immediately obtain a recognizable image of subsurface objects.
A. V. Popov +5 more
doaj +1 more source