Dielectric constant
DIELECTRIC CONSTANT OBTAINED FROM TDR AND VOLUMETRIC MOISTURE OF SOILS IN SOUTHERN BRAZIL
... The result of the adjustments of the equations proposed by Topp et al. (1980) and Ledieu et al. (1986) considering the soils studied is presented in figure 2. Both equations overestimated the values of volumetric ...
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Microstrip antenna on a high dielectric constant substrate: BaTiO3 (BTO)CaCu3Ti4O12(CCTO) composite screenprinted thick films
... a dielectric constant at 1 kHz of ;10,000 that is nearly constant from room temperature to ...high dielectric constants (K), which lead this class of materials to be used in a large number of ...
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Retrieval of the thickness of undeformed sea ice from simulated C-band compact polarimetric SAR images
... Abstract. In this paper we introduce a parameter for the re- trieval of the thickness of undeformed first-year sea ice that is specifically adapted to compact polarimetric (CP) syn- thetic aperture radar (SAR) images. ...
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Mat. Res. vol.18 número5
... the dielectric constant increases with an increase in the ...the dielectric constant at low frequencies can be attributed to the lower electrostatic binding strength, arising due to the space ...
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STRUCTURAL AND DIELECTRIC STUDIES ON Sr0.5-3y/2LayBa0.5Nb2O6 CERAMIC SYSTEMS WITH VARIED SINTERING TIME AND La CONCENTRATION
... the dielectric constant for La doped SBN from are shown in Figure 9a and b ...the dielectric constant increased except for 7 % (see Figure ...the dielectric constant signiicantly ...
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BRAZILIAN ARCHIVES OF BIOLOGY AND TECHNOLOGY
... own dielectric constant, organic solvents posses lower dielectric constantthan inorganic solvents, so water possesses higher dielectric constant than organic solvents, therefore from ...
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Braz. J. Phys. vol.34 número1
... Before discussing the solvent effects on the conformational equilibrium of furfural, it is interesting to mention that this molecule may exist in two possible conformations: OO-cis and OO-trans (Fig. 1). The OO-trans ...
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Synthesis of Cerium Dioxide High-k Thin Films as a Gate Dielectric in MOS Capacitor
... high dielectric constant (high-k) oxides in order to over- come the gate delay and other related issues [1-3]. It is clear from the development of high-k materials that only replacing the gate insulator may ...
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Cerâmica vol.58 número345
... Conventionally ferrites are used phase shifter in microwave-tuned circuits for the construction of phased array antennas. But these materials are costly and devices made from them are bulky. Therefore for the purpose of ...
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Mat. Res. vol.20 número2
... the dielectric constant showed a decreasing tendency with doping content and with increasing frequency for pseudo- cubic nanometric barium titanate doped with gadolinium (Gd 3+ ) where[r] ...
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Study on Optical Constants and Refractive Index Dispersion of Neutral red Doped Polymer Film
... The investigation of the optical constants such as refractive index, extinction coefficient and dielectric constant of the 3- amino-7-dimethylamino-2-methyl phenazine doped polymer film are important for ...
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A Novel Low-Cost Instrumentation System for Measuring the Water Content and Apparent Electrical Conductivity of Soils
... The soil drying procedure consists on placing the structure shown in Figure 4 in the climate chamber, which was scheduled to reach 50 ± 1 °C for three hours and go back to 25 ± 1 °C for five hours, until the soil gets ...
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Electrical characterization of in situ polymerized polyaniline thin films
... the dielectric constant as function of doping level, but also the activation energy for hop- ping carriers below and above the possible glass transition of the material around 227 ...
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art fnafreire DIELECTRIC
... and theoretical characteristics of the antenna like return loss, band- width, input impedance, and radiation patterns are in good agreement. Numerical validation is done, tacking into account the air gaps between the ...
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Dielectric and electrical properties of a mulliteglass composite from a kaolinite claymica-rich kaolin waste mixture (Propriedades dielétricas e elétricas de compósito mulitafase vítrea obtido a partir de uma mistura argila cauliníticaresíduo de caulim)
... the dielectric pattern may be attributed to different types of polarization (ionic, electronic, atomic, interfacial, ...measured dielectric constant at 1 MHz agreed with previous results for ...
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art aflalmeida dielectric permittivity
... ceramic were studied by X-ray powder diffraction, infrared and Raman scattering spectroscopy. After 30 h of milling the formation of CCTO was con®rmed by X- ray powder diffraction. The infrared and Raman scattering ...
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art fnafreire chitosan
... the dielectric constant for all the ...the dielectric constant below the value of the ceramic sample BITC (K ⫽ ...the dielectric loss is shown as function of ...bulk dielectric ...
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of dielectric properties of screenprinted MgTiO3–CaTiO3 composite thick films in the microwave frequency range
... The dielectric properties of MTO, CTO and MTO(x)– CTO(1-x) composite screen-printed thick films at room temperature were measured in the frequency range from 50 MHz to 20 GHz using the coplanar waveguide (CPW) ...
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J. Microw. Optoelectron. Electromagn. Appl. vol.16 número3
... The second step is the substrate characterization in order to get accurate values for dielectric constant and loss tangent. In this case we demonstrated that we can measure them by using only 1- port ...
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Mat. Res. vol.7 número4
... the dielectric constant of a gypsum sample with 45% moisture on the L and C microwave ...the dielectric constant is different from the usual one described in the recent ...
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