Results 31 to 40 of about 117,217 (324)

Preparation and Electrical Properties of Insulation Paper Composed of SiO<sub>2</sub> Hollow Spheres

open access: yesEnergies, 2012
SiO<sub>2</sub> hollow spheres and low relative permittivity insulation paper handsheets composed of these SiO<sub>2</sub> hollow spheres with different weight percentages were successfully prepared. Low-content SiO<sub>2<
Chao Tang   +5 more
doaj   +1 more source

Measurement of the effective relative permittivities of microstrip

open access: yesElectronics Letters, 1975
A new method for determining the effective relative permittivity of microstrip, even at high frequencies, is presented. Four microstrips having the same physical and geometric characteristics, but different lengths, are needed; the mismatch due to the launchers is completely overcome.
BIANCO, BRUNO, PARODI, MAURO
openaire   +2 more sources

Room temperature fabrication and post-impregnation of LMO-ST composites: Engineering and modeling of dielectric properties

open access: yesOpen Ceramics, 2023
In this work, the effect of changing the Li2MoO4-SrTiO3 (LMO-ST) compositional proportion (1–100 wt%) on the microstructure, dielectric properties, and relative density of LMO-ST composites fabricated at room temperature was investigated.
Nina Kuzmić   +4 more
doaj   +1 more source

Distortion of electric field homogeneity between two thin toroidal electrodes by a dielectric sphere [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2022
We assess the influence of a radius and a relative permittivity of an isotropic dielectric sphere on electric field homogeneity. The homogenous electric field is generated using two thin toroidal electrodes, charged by equal charges of opposite ...
Mančić Žaklina J.   +2 more
doaj   +1 more source

Dielectric properties of thin insulating layers measured by Electrostatic Force Microscopy [PDF]

open access: yes, 2010
In order to measure the dielectric permittivity of thin insulting layers, we developed a method based on electrostatic force microscopy (EFM) experiments coupled with numerical simulations.
Riedel, Clément   +8 more
core   +1 more source

Relative permittivity in the electrical double layer from nonlinear optics [PDF]

open access: yesThe Journal of Chemical Physics, 2018
Second harmonic generation (SHG) spectroscopy has been applied to probe the fused silica/water interface at pH 7 and the uncharged 11¯02 sapphire/water interface at pH 5.2 in contact with aqueous solutions of NaCl, NaBr, NaI, KCl, RbCl, and CsCl as low as several 10 μM. For ionic strengths up to about 0.1 mM, the SHG responses were observed to increase,
Mavis D. Boamah   +3 more
openaire   +3 more sources

Complex-structured 3D-printed wireframes as asteroid analogues for tomographic microwave radar measurements

open access: yesMaterials & Design, 2021
This study introduces a fused filament fabrication (FFF) process for manufacturing complex-structured asteroid analogue objects to be applied in tomographic microwave radar measurements and inversion studies. We describe an approach to control the volume
Liisa-Ida Sorsa   +5 more
doaj   +1 more source

The dielectric calibration of capacitance probes for soil hydrology using an oscillation frequency response model [PDF]

open access: yesHydrology and Earth System Sciences, 1998
Capacitance probes are a fast, safe and relatively inexpensive means of measuring the relative permittivity of soils, which can then be used to estimate soil water content.
D. A. Robinson   +6 more
doaj  

Permittivity of 3D-Printed Nylon Substrates with Different Infill Patterns and Densities for Design of Microwave Components

open access: yesDesigns, 2020
Printed circuit boards, chemical etching, and computer numerical control milling currently dominate industrial processes for manufacturing microwave components.
Hanxiong Hu   +3 more
doaj   +1 more source

The negative index of refraction demystified

open access: yes, 2002
We study electromagnetic wave propagation in mediums in which the effective relative permittivity and the effective relative permeability are allowed to take any value in the upper half of the complex plane.
Akhlesh Lakhtakia   +5 more
core   +2 more sources

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