Results 271 to 280 of about 71,789 (316)

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
openaire   +1 more source

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
openaire   +1 more source

Measurement of Dielectric Properties

2014
The ageing of the insulation of HV apparatus is not only caused by the high electric field strength but also by thermal and mechanical stresses that evolve during normal operation condition. This may lead to chemical processes associated with a gradual deterioration of the integral insulation properties.
Wolfgang Hauschild, Eberhard Lemke
openaire   +1 more source

Dielectric-resonator-based measuring devices: Relevance of the dielectric quality

2017 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2017
Sapphire-based, cylindrical dielectric — loaded microwave resonators are increasingly popular to measure the electrical, magnetic and dielectric response of various substances and materials. While it is generally accepted that “high-quality” dielectrics are necessary to obtain the best performances of a resonator as a measuring device, a quantitative ...
Torokhtif, Kostiantyn, Pompeo, Nicola, Silva, Enrico   +2 more
openaire   +1 more source

Millimeter-wave dielectric measurement of materials

Proceedings of the IEEE, 1985
It is no longer necessary to use extrapolated microwave dielectric values when designing millimeter-wave components and systems. Very recently, highly accurate millimeter-wave (5- to 1/2-mm) data on complex dielectric permittivity and loss tangent have become available to engineers for a variety of materials such as common ceramics, semiconductors ...
Mohammed N. Afsar, Kenneth J. Button
openaire   +1 more source

An overview of dielectric measurements

IEEE Transactions on Electrical Insulation, 1990
It is noted that, approximately 25 years ago, commercial electronic instruments were brought on the market that heralded a new era in dielectric measurements; this electronic era is now rapidly drawing to a close, and is on the verge of being eclipsed by an era that could be called intelligent instruments.
openaire   +1 more source

Dielectric measurements on electro-manipulation media

Biochimica et Biophysica Acta (BBA) - General Subjects, 1993
The permittivity and conductivity of solutions of sugars and sugar alcohols, such as are suitable for electric-field work on cells, were measured. The range of concentrations was 0-3 M (subject to solubility), and the frequency range was that commonly used in dielectrophoresis prior to electrofusion (200 kHz-2 MHz).
W M, Arnold, A G, Gessner, U, Zimmermann
openaire   +2 more sources

A coaxial-circular waveguide for dielectric measurement

IEEE Transactions on Geoscience and Remote Sensing, 1991
A two-port cell for the dielectric measurement of a variety of materials is described. The cell is a symmetric cylindrical sample holder connected to a coaxial line at each end. The cell has some important differences from the traditional two-port coaxial cell that is commonly used. In the proposed design, the sample is in the shape of a solid circular
Mohammad Reza Taherian, David J. Yuen, Tarek M. Habashy, Jin Au Kong   +3 more
openaire   +1 more source

The quadrant electrometer for the measurement of dielectric loss

Journal of the A.I.E.E., 1924
Walker, Skinner, Addenbrooke, Rayner, Orlich, Schultze, Thielers and others* have given a great amount of useful information on electrometers for the measurement of dielectric loss. We have found instruments made somewhat after the design of Skinner and Rayner, so rugged, and so useful as laboratory instruments, even when the instrument is subjected to
D. M. Simons, W. S. Brown
openaire   +1 more source

Generalized Bridge Network for Dielectric Measurements

Transactions of the American Institute of Electrical Engineers, 1940
RECENT experience with bridges for the determination of power factor and dielectric constant of small oil samples over a range of frequency has indicated the desirability of improving their characteristics. These improvements or developments have to do principally with changes in circuit arrangements, a generalized representation of the bridge network ...
J. C. Balsbaugh, A. H. Howell, J. V. Dotson   +2 more
openaire   +1 more source