Download or read book Millimeter Wave Complex Dielectric Permittivity and Complex Magnetic Permeability Measurements of Absorbing Materials written by Igor Ivanovich Tkachov and published by . This book was released on 2000 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents new methods for characterization of materials in the millimeter wave range. Historically, this has been the most difficult part of the electromagnetic spectrum for accurate measurements of material properties. New instrumentation has now been developed for operation in this frequency band. The new techniques developed in the course of this work allowed precise measurement of dielectric properties as well as the separation of magnetic properties from dielectric in the millimeter wave range.
Download or read book Broad band Measurement of Complex Dielectric Permittivity and Magnetic Permeability of Materials at Millimeter and Submillimeter Wavelengths written by Hua Chi and published by . This book was released on 1992 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Precise Measurement of Refractive Index and Absorption Coefficient of Near Millimeter Wave and Far Infrared Materials written by Mohammed N. Afsar and published by . This book was released on 1987 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: A quasi-optical technique, namely, dispersive Fourier transform spectrometry, has now been improved to provide high-precision continuous data of complex refractive index, complex dielectric permittivity and loss tangent of materials and complex magnetic permeability of ferrite materials at millimeter and submillimeter wavelengths. The use of a polarizing two beam interferometric technique allowed a broad frequency coverage in particularly between 6mm and 0.5mm range. Non-polar polymers such as polyethylene and teflon exhibit extremely low-loss characteristics in the entire millimeter wavelength range.
Download or read book Interferometric Measurements of the Complex Dielectric Constant of Liquids written by William S. Lovell and published by . This book was released on 1968 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Collection of Complex Permittivity and Permeability Measurements written by and published by . This book was released on 1993 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of measurements of the complex permittivity and permeability over a frequency range of 0.1-5.1 GHz for a range of microwave absorbing materials used in a variety of accelerator applications. We also describe the automated measurement technique which uses swept-frequency S-parameter measurements made on a strip transmission line device loaded with the material under test.
Download or read book Millimeter and Submillimeter Waves written by and published by . This book was released on 1998 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic Measurement Techniques for Materials Characterization written by Victorino Franco and published by Springer Nature. This book was released on 2021-09-28 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the most commonly used techniques for characterizing magnetic material properties and their applications. It provides a comprehensive and easily digestible collection and review of magnetic measurement techniques. It also examines the underlying operating principles and techniques of magnetic measurements, and presents current examples where such measurements and properties are relevant. Given the pervasive nature of magnetic materials in everyday life, this book is a vital resource for both professionals and students wishing to deepen their understanding of the subject.
Download or read book The Use of Complex Dielectric Constant as a Diagnostic Tool for the Remote Sensing of Terrestrial Materials written by R. S. Vickers and published by . This book was released on 1971 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: A basic problem in remote sensing is to find parameters which can be measured that can lead to a unique signature of given target materials. Two such parameters are the dielectric coefficient and conductivity of the material. In this report the feasibility of measuring the complex dielectric constant of a smooth material from an aircraft or satellite by measuring the refelection of an incident electromagnetic wave is investigated. The results of several experimental approaches to the remote measurement of complex dielectric constant are reported. The methods investigated include X band swept frequency reflectance measurements, dual polarization, and short pulse measurements. For measurements at frequencies above 100 MHz it is shown that the dielectric constant can be determined with plus or minus 10% by measurement of the real part of the complex reflection coefficientto plus or minus 0.3 db. It is further shown that the complex polarization method for determining the complex dielectric constant is not usable for angles of incidence near the normal. (Author).
Download or read book Computational Methods and Experiments in Materials Characterization III written by C. A. Brebbia and published by WIT Press. This book was released on 2007 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Until recently, engineering materials could be characterized successfully using relatively simple testing procedures. As materials technology advances, interest is growing in materials possessing complex meso-, micro- and nano-structures, which to a large extent determine their physical properties and behaviour. The purposes of materials modelling are many: optimization, investigation of failure, simulation of production processes, to name but a few. Modelling and characterisation are closely intertwined, increasingly so as the complexity of the material increases. Characterisation, in essence, is the connection between the abstract material model and the real-world behaviour of the material in question. Characterisation of complex materials therefore may require a combination of experimental techniques and computation. This book publishes papers presented at the Third International Conference on Computational Methods and Experiments in Material Characterisation.Topics covered include: Composites; Ceramics; Alloys; Cements and Cement Based Materials; Biomaterials; Thin Films and Coatings; Advanced Materials; Imaging Analysis; Thermal Analysis; New Methods; Surface Chemistry, Nano Indentation; Continuum Methods; Particle Models; Damage Mechanics; Innovative Techniques; Stochastic Methods.
Download or read book Principles of Electronic Ceramics written by Larry L. Hench and published by Wiley-Interscience. This book was released on 1990-01-16 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modern introduction to the physical principles of electronic ceramic materials. Describes theory in structural terms via the language of quantum mechanics and statistical mechanics, bridging the gap between purely theoretical solid-state texts and strictly applied materials science texts. Most of the equations employed are derived from first principles. Each chapter describes the relevant properties of the materials covered, presents applications of the theory, and includes a graded set of problems (some to be done on a computer). Adopts the convention of the American Ceramic Society. Contains tables and figures.
Download or read book Advances in Composite Materials written by Brahim Attaf and published by BoD – Books on Demand. This book was released on 2011-03-16 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: By adopting the principles of sustainable design and cleaner production, this important book opens a new challenge in the world of composite materials and explores the achieved advancements of specialists in their respective areas of research and innovation. Contributions coming from both spaces of academia and industry were so diversified that the 28 chapters composing the book have been grouped into the following main parts: sustainable materials and ecodesign aspects, composite materials and curing processes, modelling and testing, strength of adhesive joints, characterization and thermal behaviour, all of which provides an invaluable overview of this fascinating subject area. Results achieved from theoretical, numerical and experimental investigations can help designers, manufacturers and suppliers involved with high-tech composite materials to boost competitiveness and innovation productivity.
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.
Download or read book Conference Digest International Conference on Infrared and Millimeter Waves written by and published by . This book was released on 1987 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Dielectric Spectroscopy of Electronic Materials written by Yuriy Poplavko and published by Woodhead Publishing. This book was released on 2021-07-06 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dielectric Spectroscopy of Electronic Materials: Applied Physics of Dielectrics incorporates the results of four decades of research and applications of dielectric spectroscopy for solids, mostly for the investigation of materials used in electronics. The book differs from others by more detailed analysis of the features of dielectric spectra conditioned by specific mechanisms of electrical polarization and conductivity. Some original methods are presented in the simulation of frequency distributions (relaxers and oscillators), with methods proposed for various ferroelectrics frequency-temperature dielectric spectra. Also described are original methods for ferroelectrics on microwaves investigation, including the features of thin films study. The book is not burdened by complex mathematical proofs and should help readers quickly understand how to apply dielectric spectroscopy methods to their own research problems. More advanced readers may also find this book valuable as a review of the key concepts and latest advances on the topics presented. Introduces critical material characterization techniques by an expert with more than 40 years of experience in dielectric spectroscopy Reviews advances in dielectric spectroscopy methods to enable advances such as the miniaturization of electronics at the nanoscale Provides an overview of polarization mechanisms utilizing different models (i.e., oscillator and relaxation)
Download or read book Low dimensional Materials and Applications written by Ying Jia and published by Walter de Gruyter GmbH & Co KG. This book was released on 2017-12-18 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low-dimensional Materials and Applications systematically introduces the preparation and performance of low-dimensional materials, such as carbon fiber, carbon nanotubes, graphene etc, as well as their applications in environmental pollution control, electronics, coating industry and defense technologies. Written with a practical focus and containing abundant examples, it is well suited for both researchers and engineers.
Download or read book Electrical Electronics Abstracts written by and published by . This book was released on 1997 with total page 1948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
