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Author : William E. Webb
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.3/5 (91 download)
Download or read book Measurement of Dielectric Properties of Minerals at Microwave Frequencies written by William E. Webb and published by . This book was released on 1986 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William E. Webb
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (247 download)
Download or read book Measurement of Dielectric Properties of Minerals at Microwave Frequencies written by William E. Webb and published by . This book was released on 1986 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bruce D. Sweeny
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.3/5 (121 download)
Download or read book Measurements of the Dielectric Properties of Wet Snow Using a Microwave Technique written by Bruce D. Sweeny and published by . This book was released on 1974 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: An accurate method of measuring liquid water in snow covers is required to determine the properties of wet snow. The dielectric properties of wet snow must be utilized to adequately measure its liquid water content. In this study the effect of liquid water on the complex dielectric constant of natural snow is determined in the microwave frequency range. Deloor's method for calculating the dielectric constant for mixtures and the results of waveguide experiments on samples of wet snow and glass beads are used to construct a calibration curve relating the measured dielectric loss factor directly to the water content of wet snow. The results are independent of porosity, past history and chemical impurities. A relation between the effective dielectric constant and the porosity and water content is proposed and tested experimentally. The general nature of this relation is described and suggestions are made for the development of a more precise relation. It is concluded that the dielectric constant is a function of porosity and water content only.
Author : Johanna B. Salsman end
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (228 download)
Download or read book Measurement of Dielectric Properties in the Frequency Range of 300 MHz to 3 GHz as a Function of Temperature Density written by Johanna B. Salsman end and published by . This book was released on 1992 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of the research effort on investigating the effects of microwave energy on the chemical and physical properties of minerals and ores, the U.S. Bureau of Mines, Tuscaloosa Research Center has conducted an extensive research program on identifying those properties of minerals that are affected by microwave energy, namely the dielectric constant and loss tangent. The objective was to establish a reliable data base for predicting the effects of microwave heating on minerals. The dielectric constant and loss tangent of minerals, commonly referred to as the dielectric properties, were determined utilizing the theory of microwave propagation through an open-ended air filled coaxial line that was terminated at its open end with the particular mineral under investigation and measuring the reflection coefficient of the mineral with a network analyzer. From the measured values of the reflection coefficient, the dielectric properties of the mineral could be determined. The dielectric properties of powdered minerals with medium to high electrical conductivities (tan>.0l) were measured in the frequency range of 300 MHz to 3 GHz. Since the minerals were prepared as powders, techniques were used to relate the measured dielectric properties of the powdered minerals to the dielectric properties of the mineral at its theoretical or natural density. Also, these measurements were performed as a function of temperature, from 25 deg to 325 deg C. The results of the dielectric constants and loss tangents using this method were determined to be precise within + or - 5 pct. This report describes the method of measurement and discusses the results of the Bureau's investigations into dielectric properties of minerals with the inclusion of typical measured data.
Author : Ronald H. Church
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.3/5 (91 download)
Download or read book Dielectric Properties of Low-loss Minerals written by Ronald H. Church and published by . This book was released on 1988 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. B. Salsman
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (33 download)
Download or read book A Technique for Measuring the Dielectric Properties of Minerals at Microwave Heating Frequencies Using an Open-ended Coaxial Line written by J. B. Salsman and published by . This book was released on 1994 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Vyacheslav V. Komarov
Publisher : Artech House
ISBN 13 : 160807529X
Total Pages : 186 pages
Book Rating : 4.6/5 (8 download)
Download or read book Handbook of Dielectric and Thermal Properties of Materials at Microwave Frequencies written by Vyacheslav V. Komarov and published by Artech House. This book was released on 2012 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of microwave energy for thermal processing of different materials and substances is a rapidly growing trend in modern science and engineering. In fact, optimal design work involving microwaves is impossible without solid knowledge of the properties of these materials. Heres a practical reference that collects essential data on the dielectric and thermal properties of microwaveable materials, saving you countless hours on projects in a wide range of areas, including microwave design and heating, applied electrodynamics, food science, and medical technology. This unique book provides hard-to-find information on complex dielectric permittivity of media at industrial, scientific, and medical frequencies (430 MHz, 915MHz, 2.45GHz, 5.8 GHz, and 24.125GHz). Written by a leading expert in the field, this authoritative book does an exceptional job at presenting critical data on various materials and explaining what their key characteristics are concerning microwaves.
Author : fawwaz T. Ulaby, Tom Bengal et al.
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.L/5 ( download)
Download or read book Microwave Dielectric Properties of Rocks written by fawwaz T. Ulaby, Tom Bengal et al. and published by . This book was released on with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Grigas
Publisher : CRC Press
ISBN 13 : 9782884491907
Total Pages : 352 pages
Book Rating : 4.4/5 (919 download)
Download or read book Microwave Dielectric Spectroscopy of Ferroelectrics and Related Materials written by Grigas and published by CRC Press. This book was released on 1996-02-19 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes some of the new broad-band techniques for obtaining spectra of dielectric permittivity and loss in ferroelectrics and related materials in the wavelength range of meter to submillimeter. Also presents spectroscopic results for many crystals, including low-dimensional and ferroelectric semiconductors, protonic conductors, quasi-one-dimensional H- bonded, and other order-disorder ferroelectrics. The methods and results are useful in developing new conducting materials for digital communications and radar systems. Annotation copyright by Book News, Inc., Portland, OR
Author : Antonio Cumbane
Publisher :
ISBN 13 : 9783838330327
Total Pages : 317 pages
Book Rating : 4.3/5 (33 download)
Download or read book Microwave Treatment of Minerals and Ores written by Antonio Cumbane and published by . This book was released on 2010-01 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jonathan Breeze
Publisher : Springer
ISBN 13 : 3319445472
Total Pages : 180 pages
Book Rating : 4.3/5 (194 download)
Download or read book Temperature and Frequency Dependence of Complex Permittivity in Metal Oxide Dielectrics: Theory, Modelling and Measurement written by Jonathan Breeze and published by Springer. This book was released on 2016-09-08 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the dielectric properties of metal-oxide ceramics at microwave frequencies. It also demonstrates for the first time that a theory of harmonic phonon coupling can effectively predict the complex permittivity of metal oxides as a function of temperature and frequency. Dielectric ceramics are an important class of materials for radio-frequency, microwave and emergent terahertz technologies. Their key property is complex permittivity, the real part of which permits the miniaturisation of devices and the imaginary part of which is responsible for the absorption of electromagnetic energy. Absorption limits the practical performance of many microwave devices such as filters, oscillators, passive circuits and antennas. Complex permittivity as a function of temperature for low-loss dielectrics is determined by measuring the resonant frequency of dielectric resonators and using the radial mode matching technique to extract the dielectric properties. There have been only a handful of publications on the theory of dielectric loss, and their predictions have often been unfortunately unsatisfactory when compared to measurements of real crystals, sometimes differing by whole orders of magnitude. The main reason for this is the lack of accurate data for a harmonic coupling coefficient and phonon eigenfrequencies at arbitrary q vectors in the Brillouin zone. Here, a quantum field theory of losses in dielectrics is applied, using results from density functional perturbation theory, to predict from first principles the complex permittivity of metal oxides as functions of frequency and temperature.
Author : Merlin Edward Olmstead
Publisher : Hassell Street Press
ISBN 13 : 9781013570827
Total Pages : 54 pages
Book Rating : 4.5/5 (78 download)
Download or read book Dielectric Constant Measurements at Microwave Frequencies written by Merlin Edward Olmstead and published by Hassell Street Press. This book was released on 2021-09-09 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author : Frank E. Harris
Publisher :
ISBN 13 :
Total Pages : 250 pages
Book Rating : 4.:/5 (28 download)
Download or read book Dielectric Properties of Aqueous Solutions at Microwave Frequencies written by Frank E. Harris and published by . This book was released on 1954 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher : ASTM International
ISBN 13 :
Total Pages : 107 pages
Book Rating : 4./5 ( download)
Download or read book Measurement of Dielectric Properties Under Space Conditions written by and published by ASTM International. This book was released on 1967 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sandra Costanzo
Publisher : BoD – Books on Demand
ISBN 13 : 9535108484
Total Pages : 174 pages
Book Rating : 4.5/5 (351 download)
Download or read book Microwave Materials Characterization written by Sandra Costanzo and published by BoD – Books on Demand. This book was released on 2012-11-14 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave Materials Characterization is an edited book discussing recent researches on basic and innovative measurement techniques for the characterization of materials at microwave frequencies, in terms of quantitative determination of their electromagnetic parameters, namely the complex permittivity and permeability. It is divided into two parts: Part 1, including original contributions on advanced techniques for the characterization of dielectric materials, and Part 2, devoted to the microwave characterization of biological tissues.
Author : E. S. Hotston
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (1 download)
Download or read book The Measurement of the Dielectric Properties of Glass at Microwave Frequencies written by E. S. Hotston and published by . This book was released on 1957 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jitendra Behari
Publisher : Springer Science & Business Media
ISBN 13 : 1402032889
Total Pages : 177 pages
Book Rating : 4.4/5 (2 download)
Download or read book Microwave Dielectric Behaviour of Wet Soils written by Jitendra Behari and published by Springer Science & Business Media. This book was released on 2006-03-10 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers detailed discussion of dielectric measurement and behaviour of wet soil, from theoretical and experiment points of view. The author describes numerous microwave measurement techniques and protocols, and shows how to evaluate and choose among them. The book is written primarily with the requirements of interdisciplinary researchers in agriculture and soil science in mind.
