Results 21 to 30 of about 24,613 (311)

Significant enhancement of dielectric properties in polyimides with sulfonyl groups in the side chains

open access: yesIET Nanodielectrics, 2023
Polymer dielectrics with excellent thermal resistance and superior energy storage behaviour are extensively demanded with the increasing development of film capacitors applied in hostile environments. In this study, novel diamine with sulfonyl‐containing
Jinpeng Luo   +4 more
doaj   +1 more source

Study on water absorption and dielectric response of epoxy resin impregnated paper bushing

open access: yesIET Generation, Transmission & Distribution, 2023
Epoxy‐impregnated paper transformer bushings are prone to water absorption due to the presence of water‐attracting moieties in the cellulose chemical structure and epoxy resin, leading to moisture‐induced insulation defects.
Daning Zhang   +6 more
doaj   +1 more source

Irregularities in a metal-dielectric shielded waveguide with low losses for the frequency range 90–100 GHz

open access: yesФизика волновых процессов и радиотехнические системы, 2022
This article is devoted to the study of waveguide metal-dielectric structures in the frequency range of 90100 GHz with low losses up to 0,05 dB/m. The paper considers the effect of sharp irregularities on a section of a regular line, which leads to a ...
Vladislav V. Krutskikh   +4 more
doaj   +1 more source

iGSE-CD—An Electric-/Displacement-Field Related Steinmetz Model for Class II Multilayer Ceramic Capacitors Under Low-Frequency Large-Signal Excitation

open access: yesIEEE Open Journal of Power Electronics, 2023
Multilayer Ceramic Capacitors (MLCCs) are of paramount importance in electronics and ferroelectric Class II dielectrics enable outstanding energy-density values.
David Menzi   +6 more
doaj   +1 more source

Piezoelectric properties and dielectric losses in PVDF-PMMA blends [PDF]

open access: yes, 1984
Piezoelectric properties and dielectric losses have been measured in polyvinylidene fluoride (PVDF)/polymethyl methacrylate (PMMA) blends to assess the value of this class of polymers as ultrasonic transducer materials.
DE ROSSI, DANILO EMILIO   +3 more
core   +1 more source

Dissipation Losses in Artificial Dielectric Layers [PDF]

open access: yes, 2018
Closed-form expressions to describe artificial dielectric layers (ADLs) with finite conductivity are presented. The propagation of a generic plane wave within the artificial material is described by means of transmission line models, where each layer is ...
Cavallo, D. (author), Cavallo, D.
core   +1 more source

Correction of dielectric losses in practical leaky-wave antenna designs [PDF]

open access: yes, 2007
In this paper, the leaky-mode theory is applied to take into account for the dielectric losses in millimetre waveband inhomogeneous leaky-wave antennas. A practical dielectric-filled cosine-tapered periodic leaky-wave antenna working in the 45GHz band is
Goussetis, George   +4 more
core   +1 more source

Complex Permittivity Measurement System for Solid Materials Using Complementary Frequency Selective Surfaces

open access: yesIEEE Access, 2020
This paper describes a novel method of characterizing complex permittivity using a complementary frequency selective surface (CFSS). The CFSS provides a passband behavior and the change in the passband when a material under test (MUT) is placed adjacent ...
Chih-Kuo Lee   +5 more
doaj   +1 more source

Electromagnetic Absorbers based on High-Impedance Surfaces: From ultra-narrowband to ultra-wideband absorption

open access: yesAdvanced Electromagnetics, 2012
Different electrically-thin absorbing designs based on  High-Impedance Surfaces (HIS) are presented and classified on the basis of the nature of loss. HIS structures allow achieving absorption by exploiting either dielectric or ohmic (resistive) losses ...
F. Costa, A. Monorchio
doaj   +1 more source

Static dielectric constant and dielectric loss of cellulose insulation: Molecular dynamics simulations

open access: yesHigh Voltage, 2021
Reducing the dielectric constant and loss of cellulose insulation can make the electric field distribution uniform in oil‐paper insulation systems and decrease the heat generation in dielectric materials, thus ensuring a reliable transformer operation ...
Wei Hou   +5 more
doaj   +1 more source

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