Results 31 to 40 of about 4,278,237 (303)

Fused filament fabrication of functionally graded polymer composites with variable relative permittivity for microwave devices

, 2020
Fused filament fabrication (FFF) is a continuously growing additive manufacturing technology that aside from physical prototypes can also deliver functional prototypes and devices for radiofrequency (RF) and microwave applications.
A. Goulas, Shiyu Zhang, J. McGhee, Darren A. Cadman, W. Whittow, J. Vardaxoglou, D. Engstrøm   +6 more
semanticscholar   +1 more source

Measurement of the effective relative permittivities of microstrip

Electronics 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

An empirical correlation for the relative permittivity of liquids in a wide temperature range: Application to the modeling of electrolyte systems with a GE/EoS approach

Fluid Phase Equilibria, 2020
Relative permittivity, also known as static dielectric constant, is a key property of solvents in electrolyte solutions. It strongly influences the solubility of solutes and, therefore, it can be used as a predictive tool in chemical engineering ...
I. Raspo, É. Neau
semanticscholar   +1 more source

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

Serbian 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., Petković Bojana R., Cvetković Zlata Ž.   +2 more
doaj   +1 more source

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

Open 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, Srečo Davor Škapin, Mikko Nelo, Heli Jantunen, Matjaž Spreitzer   +4 more
doaj   +1 more source

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

Materials & 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, Christelle Eyraud, Alain Hérique, Mika Takala, Sampsa Pursiainen, Jean-Michel Geffrin   +5 more
doaj   +1 more source

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

Hydrology 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, D. A. Robinson, C. M. K. Gardner, J. Evans, J. D. Cooper, M. G. Hodnett, J. P. Bell   +6 more
doaj  

Frequency Response Analysis of FAU, LTA and MFI Zeolites Using UV-Vis and Electrochemical Impedance Spectroscopy

Optics, 2023
Zeolites are porous materials that have cavities interconnected by channels. These crystalline materials are composed of Si-O tetrahedral structures, and according to the assembly of such tetrahedral structures, specific crystalline structures are ...
Fabian N. Murrieta-Rico, Joel Antúnez-García, Rosario I. Yocupicio-Gaxiola, Armando Reyes Serrato, Vitalii Petranovskii, Mufei Xiao, Oleg Sergiyenko, Wendy Flores-Fuentes, Julio C. Rodríguez-Quiñonez   +8 more
doaj   +1 more source

Evaluating the Relationship Between Relative Permittivity and Infill Density in 3D Printed Dielectric Slabs

IEEE Access
This paper investigates the relationship between relative permittivity and infill density in 3D printed dielectric slabs. As the infill density of a 3D printed substrate is varied, its relative permittivity also varies which affects the performance of ...
Bibek Kattel, Winn Elliott Hutchcraft, Richard K. Gordon   +2 more
doaj   +1 more source

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

AIP 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, Yun Wu, Kai Kang, Yuanfu Chen, Yanrong Li, Tangsheng Chen, Yuehang Xu   +6 more
doaj   +1 more source