Results 111 to 120 of about 114,262 (333)

Using GPS to measure ground complex permittivity

open access: yesElectronics Letters, 1998
In personal satellite communications, ground specular reflection may be received along with the direct signal. To characterise this effect at L-band, fade measurements were taken over grass and asphalt surfaces using a GPS receiver. By matching experimental results to a simulation, ground electrical characteristics were derived, showing a novel method ...
Vogel, WJ, Kavak, ADNAN, Xu, GH
openaire   +2 more sources

Nonlocal Conduction in a Metawire

open access: yesAdvanced Materials, Volume 37, Issue 13, April 2, 2025.
A 1D metawire composed of twisted copper wires is designed and realized. This metamaterial exhibits pronounced effects of nonlocal electric conduction according to Ohm's law. The current at one location not only depends on the electric field at that location but also on other locations.
Julio Andrés Iglesias Martínez   +3 more
wiley   +1 more source

One-Port Coaxial Line Sample Holder Characterisation Method of Dielectric Spectra

open access: yesSensors
A technique for solving the one-port closed coaxial transmission line sample holder scattering equation for complex permittivity inversion for lossy materials is presented.
Iman Farhat   +5 more
doaj   +1 more source

Effect of low-dose-rate ionizing radiation on the complex dielectric permittivity of CdZnTe crystals

open access: diamond, 2023
O.O. Poluboiarov   +4 more
openalex   +2 more sources

Emergent Motility of Self‐Organized Particle‐Giant Unilamellar Vesicle Assembly

open access: yesAdvanced Materials, EarlyView.
Giant unilamellar vesicles (GUVs), when combined with silica particles under alternating electric fields, spontaneously self‐assemble into motile structures. Asymmetric particle decoration induces fluid flows that propel the assemblies, enabling persistent motion and reversible control.
Selcan Karaz   +5 more
wiley   +1 more source

Ferroelectric and Incipient Ferroelectric Properties of a Novel Sr_(9-x)PbxCe2Ti2O36 (x=0-9) Ceramic System

open access: yes, 2008
Sr_(9-x)PbxCe2Ti12O36 system is derived from the perovskite SrTiO3 and its chemical formula can be written as (Sr_(1-y)Pby)0.75Ce0.167TiO3. We investigated dielectric response of Sr_(9-x)PbxCe2Ti12O36 ceramics (x = 0-9) between 100 Hz and 100 THz at ...
Barrett J. H.   +29 more
core   +1 more source

Broadband Complex Permittivity Determination for Biomedical Applications [PDF]

open access: yes, 2010
The complex permittivity determination based on reflection coefficient measurement is suitable for the determination of the dielectric parameters of materials in wide bands. This method was described from the viewpoint of electromagnetic field theory and the coaxial probes were described with the equivalent circuit as an antenna in a lossy medium ...
Zajicek, Radim, Vrba, Jan
openaire   +2 more sources

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

open access: yesAdvanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades   +7 more
wiley   +1 more source

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