Results 11 to 20 of about 28,237 (308)

High Selectivity Single Wideband and Quad-Band HTS Filters Using Novel Quad-Mode Resonators With Self-Coupled Structure

open access: yesIEEE Access, 2021
This paper presents improved quad-mode resonators based on the open/short-end load of the center stub, which introduces the self-coupled structure. Compared with the traditional stub-loaded stepped impedance resonator (SLSIR), the proposed quad-mode ...
Junjie Zhang   +3 more
doaj   +1 more source

Electromagnetic Wave Propagation in Random Waveguides [PDF]

open access: yesMultiscale Modeling & Simulation, 2015
42 pages, 3 ...
Ricardo Alonso, Liliana Borcea
openaire   +2 more sources

Application of Semi-Airborne Frequency Domain Electromagnetic Data Based on Improved Ant-Colony-Optimized Wavelet Threshold Denoising Method

open access: yesIEEE Access, 2022
The semi-airborne frequency domain electromagnetic detection method is a popular electromagnetic detection method in which the transmission system is excited on the ground and the reception system coil is in the air to measure the vertical magnetic field
Jigen Xia   +5 more
doaj   +1 more source

Dielectric permittivity of dusty plasma in the Earth's mesosphere

open access: yesEarth and Planetary Physics, 2021
This paper deals with the dielectric permittivity of dusty plasma in the earth’s mesosphere. We give expressions for the complex dielectric permittivity of dusty plasma, taking into account the effects of the dust charging process and magnetic field.
Hui Li, Jian Wu
doaj   +1 more source

The Comparison of Electron Density between CSES In Situ and Ground-Based Observations in China

open access: yesRemote Sensing, 2022
As the observation accuracy of parameters in the ionosphere cannot be directly checked, the comparison with other observations is the main way to evaluate the data quality of satellite measurements.
Jing Liu   +3 more
doaj   +1 more source

Plasma Mismatching with Microwave Transmission Characteristics for Diagnostic Purposes [PDF]

open access: yesJournal of Nuclear Research and Applications, 2023
Many remote diagnostics systems rely on transmission and reflection of electromagnetic waves. In diagnostics facilities such as microwave reflectometers which operate in the cut-off frequency range, collisionality of the plasma can affect the ...
E. Noori
doaj   +1 more source

First Comparative Analysis of the Simultaneous Horizontal Wind Observations by Collocated Meteor Radar and FPI at Low Latitude through 892.0-nm Airglow Emission

open access: yesRemote Sensing, 2021
The Fabry–Pérot interferometer (FPI) and meteor radar are two important techniques for measuring the horizontal wind field in mesopause region, the observations of which still lack comprehensive comparison.
Shengyang Gu   +7 more
doaj   +1 more source

Dual-Mode Microstrip Patch Bandpass Filters With Generalized Frequency Responses

open access: yesIEEE Access, 2019
A basic two-pole bandpass filter based on the dual-mode square patch resonator is presented and analyzed to realize generalized frequency responses in terms of two finite transmission zeros (FTZs).
Qing Liu   +4 more
doaj   +1 more source

Hereditary Mathematical Model of the Dynamics of Radon Accumulation in the Accumulation Chamber

open access: yesMathematics, 2023
Mathematical modeling is used to study the hereditary mechanism of the accumulation of radioactive radon gas in a chamber with gas-discharge counters at several observation points in Kamchatka.
Dmitrii Tverdyi   +2 more
doaj   +1 more source

On precursors of electromagnetic wave propagation [PDF]

open access: yesSymposium - International Astronomical Union, 1979
The precursor theory of an electromagnetic wavetrain propagating through a dispersive medium is briefly reviewed. The few successful experimental determinations of these precursors, which have been reported in the literature, are limited to transients in waveguides. The determination of precursors in the optical frequency range appears to be achievable
openaire   +1 more source

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