Results 51 to 60 of about 26,887 (312)

A strategy for accurate prediction of dielectric permittivity and dielectric strength in polyimide

High Voltage
A strategy was proposed to predict accurately the dielectric permittivity and dielectric strength based on the Onsager local field theory. The molecular dynamic simulation was utilised to analyse the dipole moment fluctuation in polyimide (PI) to reflect
Yu Wang, Changhai Zhang, Jiaqi Lin, Hongguo Sun, Ying Yang, Wenlong Yang   +5 more
doaj   +1 more source

Development of large radii half-wave plates for CMB satellite missions

, 2014
The successful European Space Agency (ESA) Planck mission has mapped the Cosmic Microwave Background (CMB) temperature anisotropy with unprecedented accuracy.
Brown, M., de Bernardis, P., de Maagt, P., Ellison, B., Haynes, V., Henry, M., Maffei, B., Masi, S., Ng, M. W., Noviello, F., Pagano, L., Piacentini, F., Pisano, G., Salatino, M., Shortt, B.   +14 more
core   +1 more source

Exploring Dipolar Dynamics and Ionic Transport in Metal‐Organic Frameworks: Experimental and Theoretical Insights

Advanced Functional Materials, EarlyView.
In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund, Arthur Schulz, Peter Lunkenheimer, Maryana Kraft, Thomas Bergler, Harald Oberhofer, Dirk Volkmer   +6 more
wiley   +1 more source

Dual square split ring enclosed spiral shaped hybrid metamaterial resonator with size miniaturisation for microwave wireless applications

Scientific Reports, 2022
In this research work, the development of the metamaterial unit cell is used to investigate multifunctional characteristics, exhibit preferable and capable adjustability, reconfigurable by changing the phase response of applied electromagnetic wave. This
Air Mohammad Siddiky, Mohammad Rashed Iqbal Faruque, Sabirin Abdullah, Mohammad Tariqul Islam, Mayeen Uddin Khandaker, K. S. Al-Mugren   +5 more
doaj   +1 more source

Onsager model for a variable dielectric permittivity near an interface

, 2003
Using a generalisation of an Onsager type approach, we are able to predict a dielectric permittivity profile of an inhomogeneous dipolar fluid in the presence of a dielectric interface.
Ballenegger, Vincent, Finken, Reimar, Hansen, Jean-Pierre   +2 more
core   +1 more source

Gap and channelled plasmons in tapered grooves: a review [PDF]

, 2015
Tapered metallic grooves have been shown to support plasmons -- electromagnetically coupled oscillations of free electrons at metal-dielectric interfaces -- across a variety of configurations and V-like profiles.
Bozhevolnyi, Sergey I., Kristensen, Anders, Mortensen, N. Asger, Smith, Cameron L. C., Stenger, Nicolas   +4 more
core   +4 more sources

Analyzing Electronic Excitations and Exciton Binding Energies in Y6 Films

Advanced Functional Materials, EarlyView.
The Y6 molecule is used for increasing the efficiency of organic solar cells. The exciton binding energy is calculated for ensembles of Y6 molecules that are representative of the typically used films. The calculations show that the excitons typically spread out over many molecules.
Sahar Javaid Akram, Sophie Meißner, Stephan Kümmel   +2 more
wiley   +1 more source

Measurements of electric properties using an open-ended probe blocked by a non-conducting foil

Results in Physics, 2016
An open-ended coaxial probe separated from the investigated medium by a thin non-conducting layer (foil) is proposed for making dielectric permittivity measurements within the RF range.
Alicja Wolny, Kazimierz Orzechowski, Marek Rudowski   +2 more
doaj   +1 more source

Dielectric tuning and coupling of whispering gallery modes using an anisotropic prism

, 2016
Optical whispering gallery mode (WGM) resonators are a powerful and versatile tool used in many branches of science. Fine tuning of the central frequency and line width of individual resonances is however desirable in a number of applications including ...
Foreman, Matthew R., Leuchs, Gerd, Schwefel, Harald G. L., Sedlmeir, Florian   +3 more
core   +1 more source

Comb-shaped circularly polarised dielectric resonator antenna

Electronics Letters, 2006
A new shaped circularly polarised dielectric resonator antenna is proposed. This antenna, compared to some previous investigations, is easier to implement, free from a complicated feed network and offers wider axial ratio bandwidth. About 4% AR bandwidth (< 3 dB) with S 11 < -10 dB and 3.5 dBi peak gain is reported.
L.C.Y. Chu, D. Guha, Y.M.M. Antar
openaire   +1 more source