Results 211 to 220 of about 54,450 (268)

Temperature Calibration in Dielectric Measurements

Journal of Thermal Analysis and Calorimetry, 2001
Dielectric experiments are often performed in non-isothermal conditions. Thus, there is a difference between the temperature of the sample and the sensor temperature. In this work we propose and compare three temperature calibration methods based on the detection of transitions or relaxations: i) the melting of high-purity metallic standards (indium ...
Mano, J. F., Lanceros-Méndez, S., Nunes, A. M., Dionísio, M.   +3 more
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Stripline dielectric measurements

Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1968, 1968
A stripline method for measuring dielectric constant and loss tangent of sheet insulation, particularly of stripline laminates, offers several advantages for laboratory study and routine quality control of microwave dielectric properties at frequencies above 300 MHz: (1) a stripline test circuit meets the requirement that, since many useful stripline ...
Murray Olyphant, James H. Ball
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Dielectric parameters measurement with waveguide-dielectric resonator

ICMWFST'96. 1996 4th International Conference on Millimeter Wave and Far Infrared Science and Technology. Proceedings, 2002
The method of low loss dielectric parameters measurement using microwave resonator was suggested. For these measurements the main E/sub 011/ oscillation from axial-symmetrical oscillations class of waveguide-dielectric resonator was used. The measuring section used a circular waveguide part with partial dielectric filling of its cross-section.
R.I. Belous, Yu.G. Makeev, A.P. Motornenko   +2 more
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International Comparison of Dielectric Measurements

IEEE Transactions on Instrumentation and Measurement, 1964
Three materials, i.e.,fused silica, glass, and alumina, were selected for comparison based on known or expected homogeneity, isotropy, and stability. Measurements were made by the three Government laboratories (U. K., U. S. A., and Canada), both in the radio-frequency range, using capacitor-type holders either with or without an air gap, and at ...
Bussey, H. E., Gray, J. E., Bamberger, E. C., Rushton, E., Russell, G., Petley, B. W., Morris, D.   +6 more
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Measurement of wetting of dielectrics

Electrical Engineering, 1934
Penetrability studies have been made to measure the wetting of dielectrics, in an effort to secure information on the electrical characteristics of impregnated fibrous structures. The results of these studies are discussed in this article, which includes studies of the penetration of water, benzene, and several insulating materials.
D. A. McLean, G. T. Kohman
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High-frequency dielectric measurements

IEEE Instrumentation & Measurement Magazine, 2010
The demands on dielectric material measurements have increased over the years as electrical components have been miniaturized and device frequency bands have increased. Well-characterized dielectric measurements on thin materials are needed for circuit design, minimization of crosstalk, and characterization of signal-propagation speed.
James Baker-Jarvis, Michael D. Janezic, Donald C. Degroot   +2 more
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Snow dielectric measurements

Advances in Space Research, 1989
Abstract Measurements of the dielectric constant and of the dielectric loss of Alpine snow with various stages of metamorphism are reported. The measurements covering the frequency range of up to 1GHz have been carried out in the natural snow cover; measurements in the microwave X-band (8 to 12 GHz) were recently made with natural snow samples in the
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Automated dielectric measurement

Physics Bulletin, 1978
In the study of the dielectric properties of materials by the Solid State Physics Group at Chelsea College, London, measurements are made in both the frequency and time domains under computer control. It is a feature of dielectric measurements that they involve a large range of either frequency or time, in addition to such common variables as ...
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Precision in dielectric measurements

Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1975, 1975
In this paper we shall survey measurements of dielectric properties of materials with respect to precision. We shall consider both optimum and extreme conditions, and try to indicate the source and magnitude of errors. To better acquaint conferees (and readers) with the National Bureau of Standards, we shall choose a disproportionate share of the ...
Martin G. Broadhurst, William P. Harris
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Microwave Materials Dielectric Measurements

MRS Proceedings, 1990
ABSTRACTTexas Instruments Defense Systems and Electronics Group develops radars, missile systems, infra-red systems and electronic systems for the Defense Department. Materials having special microwave properties are needed for radar systems, missile systems that home on microwave emissions, microwave emitter locator systems, and jamming systems.
Don Purinton, Leon Stiborek
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