Wideband Relative Permittivity Characterization of Thin Low Permittivity Textile Materials Based on Ridge Gap Waveguides

2016 ◽  
Vol 64 (11) ◽  
pp. 3839-3850 ◽  
Author(s):  
Shoukry I. Shams ◽  
Muhammad M. Tahseen ◽  
Ahmed A. Kishk
Keyword(s):  
Relative Permittivity ◽  
Textile Materials ◽  
Low Permittivity

Processing and characterization of Pb(Zr, Ti)O3 films, up to 10 μm thick, produced from a diol sol-gel route

1996 ◽  
Vol 11 (10) ◽  
pp. 2556-2564 ◽  
Author(s):  
Y. L. Tu ◽  
S. J. Milne
Keyword(s):  
Film Thickness ◽  
Relative Permittivity ◽  
Sol Gel ◽  
Dissipation Factor ◽  
Multilayer Coatings ◽  
A Value ◽  
Pzt Film ◽  
Interface Layers ◽  
Low Permittivity

A recently developed diol sol-gel route has been modified in order to produce multilayer PbZr0.53Ti0.47O3 films on platinized sapphire substrates. Up to 20 depositions of a 1.1 M sol were carried out leading to a final film thickness of 10 μm. A similar thickness could be achieved from 12 coatings of a more concentrated 1.6 M sol. Decomposition and crystallization of the multilayer coatings were performed using a two-stage prefiring sequence, at 350 °C and 600 °C, followed by a final firing step at 700 °C. Ferroelectric remanant polarization increased with increasing film thickness to a value of 40 μC cm−2 for a 10 μm film, with a corresponding coercive field of 30 kV cm−1; the relative permittivity of this film was ∼1000 and the dissipation factor 0.04. The thickness dependence of relative permittivity could be modeled on a simple series capacitor circuit representing the ferroelectric Pb(Zr, Ti)O3 (PZT) film and low-permittivity interface layers; but other possible contributory factors are also discussed.

PREPARATION AND CHARACTERIZATION OF MECHANICALLY FLEXIBLE RUBBER-CERAMIC COMPOSITE DIELECTRICS

2013 ◽  
Vol 22 ◽  
pp. 148-152
Author(s):  
DHANESH THOMAS ◽  
M. T. SEBASTIAN
Keyword(s):  
Dielectric Loss ◽  
Hot Pressing ◽  
Relative Permittivity ◽  
Ceramic Composite ◽  
Temperature Stability ◽  
Theoretical Models ◽  
Butyl Rubber ◽  
Low Dielectric

Butyl rubber — Ca 4 La 6( SiO 4)4( PO 4)2 O 2 — composites have been prepared by sigma mixing and hot pressing. The relative permittivity of the composites varies from 3 to 5.3 at 1 MHz. All the composites show low dielectric loss of the order of 10−3 at 1 MHz. The experimentally observed values of relative permittivity are correlated with those calculated using various theoretical models. The composites show good temperature stability of relative permittivity.

Material Characterization Of Methyl Siloxane Sogs

1995 ◽  
Vol 381 ◽  
Author(s):  
Ken Numata ◽  
Thomas R. Seha ◽  
Shin-Puu Jeng ◽  
Tsuyoshi Tanaka
Keyword(s):  
Material Characterization ◽  
Interesting Property ◽  
Moisture Resistance ◽  
Filling Material ◽  
Number Density ◽  
Gap Filling ◽  
Leakage Currents ◽  
Ft Ir ◽  
Low Permittivity

AbstractMethyl siloxane spin-on-glass (SOG) is a conventional gap-filling material. In accordance with the requirement of low permittivity, many of major SOG suppliers are developing new types of methyl siloxane SOGs.The most interesting property of these SOGs is their permittivity, which we measured by making stack structures of Al-0.5%Cu / TEOS CVD SiO2 / SOG / n+ Si. We also studied I-V characteristics, refractive indices, FT-IR spectra, stress, and moisture resistance.All of the SOGs showed small stress and fair moisture resistance. Leakage currents were less than 2.5E-10 A/cm2 for bias voltages up to 5V. Permittivities ranged from 2.9 to 3.6. We observed a correlation between permittivity and FT-IR spectral features associated with Si-O-Si bonds. Reducing the number density of Si-O-Si bonds may be an effective way to lower the permittivity of this class of SOGs

Electrical characterization of low permittivity materials for ULSI inter-metal-insulation

2000 ◽  
Vol 40 (4-5) ◽  
pp. 675-678 ◽  
Author(s):  
J Cluzel ◽  
F Mondon ◽  
Y Loquet ◽  
Y Morand ◽  
G Reimbold
Keyword(s):  
Electrical Characterization ◽  
Low Permittivity

Characterization and Formulation of Microstrip-Slot Impedance with Different Thickness and Relative Permittivity

2015 ◽  
Vol 781 ◽  
pp. 53-56
Author(s):  
Khairul Huda Yusof ◽  
Norhudah Seman ◽  
Mohd Haizal Jamaluddin ◽  
D.N.A. Zaidel
Keyword(s):  
Curve Fitting ◽  
Relative Permittivity ◽  
Slot Line ◽  
Fitting Method ◽  
Curve Fitting Method ◽  
Different Thickness ◽  
Cst Microwave Studio

This paper presents the characterization of a microstrip-slot line in terms of its impedance and dimension. The characterization is made by referring to the analysis of different relative permittivity and thicknesses of substrates, which conducted by using CST Microwave Studio. Based on the characterization with the use of completing square curve fitting method, new formulated equations are proposed for microstrip-slot line. These formulated equations are suitable for thin substrate with low relative permittivity. The characterization is made based on the substrates with the selected thickness of 0.508 mm, 0.762 mm and 1.542 mm, for relative permittivity of 4.5 (TMM4), 3.38 (RO 4003C) and 2.94 (RT 6002).

scholarly journals Experimental Research on Textile and Non-Textile Materials with Applications to Ensure Electromagnetic and Bio-Electromagnetic Compatibility

2019 ◽  
Vol 25 (3) ◽  
pp. 13-18
Author(s):  
Octavian Baltag ◽  
Alina Lacrămioara Apreutesei ◽  
Georgiana Roșu ◽  
George Mihai
Keyword(s):  
Composite Structures ◽  
Electromagnetic Compatibility ◽  
Metal Structure ◽  
Cellular Systems ◽  
Electromagnetic Properties ◽  
Carbon Powder ◽  
Textile Materials ◽  
Properties And Characterization ◽  
Functional Textiles

Abstract The paper presents a synthesis of the research performed on the electromagnetic properties and characterization of textile and non-textile materials with applications in shielding and protection from the electromagnetic field. The composite structures of functional textiles intended for protective clothing or general applications for electromagnetic immunity are presented and characterized. There are analyzed composite textiles with amorphous, ferrous or non-ferromagnetic metallic threads manufactured by means of woven and knitting classical technologies as well as materials using non-metallic, electrically conductive powders. The properties of the plain jersey, rib jersey, full and half cardigan fabric, Milano rib, are presented, too. Besides textiles, there are also characterized some composite and non-composite structures using metallic yarns and carbon powder. Another direction of interest relates to the use of textile materials with amorphous metal structure with the scope of achieving a more efficient protection to the electromagnetic fields used in cellular systems and Wi-Fi networks. In addition, a comparative analysis of the methods of characterization of composite structures is made.

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