Results 31 to 40 of about 113,538 (326)

Complex Relative Permittivity Measurement Techniques [PDF]

open access: yesWarasan Witthayasat Lae Theknoloyi Mahawitthayalai Mahasarakham, 2019
This article presents a review of the techniques for measuring complex relative permittivity and also explains basic properties for understanding the principle of complex relative permittivity measurement.
Nawarat Piladaeng
doaj  

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

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

Reflectionless Sharp Bends and Corners in Waveguides Using Epsilon-Near-Zero Effects [PDF]

open access: yes, 2008
Following our recent theoretical and experimental results that show how zero-permittivity metamaterials may provide anomalous tunneling and energy squeezing through ultranarrow waveguide channels, here we report an experimental investigation of the ...
Alu, Andrea   +3 more
core   +4 more sources

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

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 Effect of Interfacial Zone Due to Nanoparticle–Surfactant Interaction on Dielectric Properties of Vegetable Oil Based Nanofluids

open access: yesIEEE Access, 2021
Nanoparticles are generally anti-lipophilic and have a tendency to aggregate when they are embedded in nanofluids. Thus, surfactants have a major role in achieving long term dispersion stability of nanofluids through surface modification of nanoparticles.
Rizwan A. Farade   +8 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  

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

Characterization of CVD graphene permittivity and conductivity in micro-/millimeter wave frequency range

open access: yesAIP Advances, 2016
The permittivity and conductivity of chemical vapor deposited monolayer graphene are investigated up to 40 GHz. The characterization method is based on a coplanar waveguide transmission line structure that is fabricated on a multilayer substrate of Si ...
Yunqiu Wu   +6 more
doaj   +1 more source

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