Results 241 to 250 of about 2,247,954 (292)

Measurements of Microstrip Effective Relative Permittivities

IEEE Transactions on Microwave Theory and Techniques, 1987
This paper presents normalized wide-bandwidth measurements of microstrip effective relative pemrittivities (epsilon/sub eff/) which were made on large-scale microstrip models. The experimental techniques are discussed, and the data are compared to the predictions of two recent closed-form design equations.
S. Deibele, J.B. Beyer
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Converse flexoelectricity with relative permittivity gradient

Applied Physics Letters, 2019
Flexoelectricity represents the linear relationship between the strain/electric gradient field and the induced electric polarization/mechanical stress in dielectric materials. This electro-mechanical behavior is important for prospective applications due to its size effect and other advantages. In this work, a converse flexoelectric effect is generated
Shuwen Zhang, Kaiyuan Liu, Xin Wen, Tonghui Wu, Minglong Xu, Shengping Shen   +5 more
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Electrical conductivity and relative permittivity of KHCO3

Physica Status Solidi (a), 1994
The electrical conductivity σ and the relative permittivity (κ) as function of temperature 300 K < T < 400 K are measured and presented for potassium hydrogen carbonate KHCO3. It seems likely that the compound undergoes tow structural phase transitions at ≈ 318 and ≈ 365 K.
M. M. Abdel-Kader, M. Fadly, M. Abu Taleb, K. Eldehamy, A. I. Ali   +4 more
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Relative permittivity detector for cable insulators

PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409), 2002
This paper presents a new measurement technique of relative permittivity (/spl epsi//sub r/) for cable insulators. The travelling wave and reflection wave theory are applied to generate low voltage pulse signal feeding cable lines that need to know /spl epsi//sub r/ of insulators.
P. Kerdonfag, S. Potivejkul, S. Jamnian, V. Kinnares   +3 more
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Variation of the relative permittivity of charged dielectrics

Applied Physics Letters, 1998
The variation of the relative permittivity of charged dielectrics with trapped charge density has been investigated by a time-resolved current method, in conjunction with a mirror image method employing a scanning electron microscope. The calculation is made by a mathematical expression derived from classical electromagnetic theory.
Ong, C.K., Song, Z.G., Oh, K.H., Gong, H., Le Gressus, C.   +4 more
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Static relative permittivity of electrolyte solutions

Electrochimica Acta, 1988
Abstract An equation has been derived for the calculation of static relative permittivity in concentrated electrolyte solutions, which takes into account both the volume exclusion by the ions and the effect of dielectric saturation caused by the strong electric field of the ions.
Jánoz Liszi, Attila Felinger, Erzsébet H. Kristóf   +2 more
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The Influence of Space Radiation on the Relative Permittivity of Dielectrics

2020
&lt;p&gt;In the study of internal charging of dielectrics inside the spacecraft, we mainly focus on the influence of conductivity of dielectrics induced by space radiation(Radiation Induced Conductivity), and regard the relative permittivity as constant.
Siyu Song, Hongfei chen, Xiangqian Yu, Qiugang Zong   +3 more
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Polarization Effects of Fluorine on the Relative Permittivity in Polyimides

Macromolecules, 1994
The effect of fluorine incorporation on dielectric properties has been studied for a series of polyimides in order to distinguish between several contributing mechanisms to the generally observed decrease in the relative permittivity. Using low-frequency capacitance measurements after exhaustive in situ drying, in conjunction with refractive index ...
G. Hougham, G. Tesoro, A. Viehbeck, J. D. Chapple-Sokol   +3 more
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The Contemporary Definition of Complex Relative Permittivity

Journal of ASTM International, 2008
Abstract ASTM D150 [Standard Test Methods for AC Loss Characteristic and Permittivity (Dielectric Constant) of Solid Electrical Insulation, 2004] is the standard for measurement of alternating current (AC). Aimed at an analysis of this standard and proceeding from the information transmission characteristic of the dielectric, the ...
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The relative permittivity transition in solid camphor

Journal of Physics C: Solid State Physics, 1972
Three-terminal measurements of capacitance and dissipation factor have been made on samples of d-camphor, dl-camphor and l-camphor at frequencies between 200 Hz and 10 kHz over the temperature range -196 degrees C to +20 degrees C. The dielectric relaxation processes in d-camphor, below the transition temperature, have been studied and the change in ...
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