Download or read book An Investigation of Microwave Dielectric Resonators written by Hung-Yuet Yee and published by . This book was released on 1963 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microwave Dielectric Resonators written by Sally J. Nauman and published by . This book was released on 1965 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: The resonant frequencies for the fundamental modes in circular cylindrical and rectangular parallelopiped high dielectric resonators have been calculated by computer for a range of values of physical dimensions and relative dielectric constant. The frequency range extends from zero to 50,000 Mc/sec, the relative dielectric constant from 50 to 1800, and physical dimensions from zero to 500 mils. Results are presented in tabular and graphical form with frequency plotted versus resonator length for parametric values of relative dielectric constant and cross sectional dimensions. A brief review of earlier work with high dielectric resonators is included. Expressions for the resonant frequency and fundamental mode field configurations are given. (Author).

Download or read book Investigation of Microwave Dielectric Resonator Filters written by Seymour B. Cohn and published by . This book was released on 1964 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microwave Dielectric Resonator tuning written by Uve H. W. Lammers and published by . This book was released on 1974 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dielectric resonators have applications as low-loss compact filters in the microwave region. Tuning characteristics of dielectric resonators that might allow for temperature compensation and frequency variability were investigated both theoretically and experimentally at L band. A secondary dielectric resonator that is offset in frequency from the tuned resonator provides a maximum tuning range of approximately 10 percent before an additional filter loss of 3 dB is incurred; the rate of tuning is slow since it is done by changing the resonator coupling (spacing). For fast tuning, a varactor is used in a coupled resonant circuit. Frequency changes can then be made in a time interval approaching 1/(filter bandwidth), but in this case the maximum tuning range before an additional filter loss of 3 dB is incurred is reduced to 2 percent of the filter frequency.

Download or read book Microwave Dielectric Resonators written by Sally J. Nauman and published by . This book was released on 1965 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The resonant frequencies for the fundamental modes in circular cylindrical and rectangular parallelopiped high dielectric resonators have been calculated by computer for a range of values of physical dimensions and relative dielectric constant. The frequency range extends from zero to 50,000 Mc/sec, the relative dielectric constant from 50 to 1800, and physical dimensions from zero to 500 mils. Results are presented in tabular and graphical form with frequency plotted versus resonator length for parametric values of relative dielectric constant and cross sectional dimensions. A brief review of earlier work with high dielectric resonators is included. Expressions for the resonant frequency and fundamental mode field configurations are given. (Author).

Download or read book Microwave Materials and Applications written by Mailadil T. Sebastian and published by John Wiley & Sons. This book was released on 2017-03-02 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent rapid progress in wireless telecommunication, including the Internet of Things, 5th generation wireless systems, satellite broadcasting, and intelligent transport systems has increased the need for low-loss dielectric materials and modern fabrication techniques. These materials have excellent electrical, dielectric, and thermal properties and have enormous potential, especially in wireless communication, flexible electronics, and printed electronics. Microwave Materials and Applications discusses the methods commonly employed for measuring microwave dielectric properties, the various attempts reported to solve problems of materials chemistry and crystal structure, doping, substitution, and composite formation, highlighting the processing techniques, morphology influences, and applications of microwave materials whilst summarizing many of the recent technical research accomplishments in the area of microwave dielectrics and applications Chapters examine: Oxide ceramics for dielectric resonators and substrates HTCC, LTCC and ULTCC tapes for substrates Polymer ceramic composites for printed circuit boards Elastomer-ceramic composites for flexible electronics Dielectric inks EMI shielding materials Microwave ferrites A comprehensive Appendix presents the fundamental properties for more than 4000 low-loss dielectric ceramics, their composition, crystal structure, and their microwave dielectric properties. Microwave Materials and Applications presents a comprehensive view of all aspects of microwave materials and applications, making it useful for scientists, industrialists, engineers, and students working on current and emerging applications of wireless communications and consumer electronics.

Download or read book Processing and Analysis of Microwave Dielectric Resonators in the System BaO Nd subscript 2 O subscript 3 TiO subscript 2 written by Frederick John Ubic and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dielectric Resonator Antennas written by Kwai Man Luk and published by Research Studies Press Limited. This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of dielectric resonator as a resonant antenna was proposed in 1983. Due to the absence of metallic loss, the dielectric resonator antenna (DRA) is highly efficient when operated at millimetre wave frequencies. With the use of high dielectric constant material, the DRA can also be used as a small and low profile antenna operated at low microwave frequencies. Low cost dielectric materials are now easily available commercially, encouraging more antenna engineers to design communication systems with DRAs.

Download or read book Wave dynamical Properties of Dielectric Resonators Investigated with Microwaves written by Stefan Bittner and published by . This book was released on 2010 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microwave Dielectric Resonator tuning written by Uve H. W. Lammers and published by . This book was released on 1974 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dielectric resonators have applications as low-loss compact filters in the microwave region. Tuning characteristics of dielectric resonators that might allow for temperature compensation and frequency variability were investigated both theoretically and experimentally at L band. A secondary dielectric resonator that is offset in frequency from the tuned resonator provides a maximum tuning range of approximately 10 percent before an additional filter loss of 3 dB is incurred; the rate of tuning is slow since it is done by changing the resonator coupling (spacing). For fast tuning, a varactor is used in a coupled resonant circuit. Frequency changes can then be made in a time interval approaching 1/(filter bandwidth), but in this case the maximum tuning range before an additional filter loss of 3 dB is incurred is reduced to 2 percent of the filter frequency.

Download or read book Dielectric Materials for Wireless Communication written by Mailadil T. Sebastian and published by Elsevier Science. This book was released on 2008-09-26 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave dielectric materials play a key role in our global society with a wide range of applications, from terrestrial and satellite communication including software radio, GPS, and DBS TV to environmental monitoring via satellite. A small ceramic component made from a dielectric material is fundamental to the operation of filters and oscillators in several microwave systems. In microwave communications, dielectric resonator filters are used to discriminate between wanted and unwanted signal frequencies in the transmitted and received signal. When the wanted frequency is extracted and detected, it is necessary to maintain a strong signal. For clarity it is also critical that the wanted signal frequencies are not affected by seasonal temperature changes. In order to meet the specifications of current and future systems, improved or new microwave components based on dedicated dielectric materials and new designs are required. The recent progress in microwave telecommunication, satellite broadcasting and intelligent transport systems (ITS) has resulted in an increased demand for Dielectric Resonators (DRs). With the recent revolution in mobile phone and satellite communication systems using microwaves as the propagation media, the research and development in the field of device miniaturization has been a major challenge in contemporary Materials Science. In a mobile phone communication, the message is sent from a phone to the nearest base station, and then on via a series of base stations to the other phone. At the heart of each base station is the combiner/filter unit which has the job of receiving the messages, keeping them separate, amplifying the signals and sending then onto the next base station. For such a microwave circuit to work, part of it needs to resonate at the specific working frequency. The frequency determining component (resonator) used in such a high frequency device must satisfy certain criteria. The three important characteristics required for a dielectric resonator are (a) a high dielectric constant which facilitates miniaturization (b) a high quality factor (Qxf) which improves the signal-to-noise ratio, (c) a low temperature coefficient of the resonant frequency which determines the stability of the transmitted frequency. During the past 25 years scientists the world over have developed a large number of new materials (about 3000) or improved the properties of known materials. About 5000 papers have been published and more than 1000 patents filed in the area of dielectric resonators and related technologies. This book brings the data and science of these several useful materials together, which will be of immense benefit to researchers and engineers the world over. The topics covered in the book includes factors affecting the dielectric properties, measurement of dielectric properties, important low loss dielectric material systems such as perovskites, tungsten bronze type materials, materials in BaO-TiO2 system, (Zr,Sn)TiO4, alumina, rutile, AnBn-1O3n type materials, LTCC, ceramic-polymer composites etc. The book also has a data table listing all reported low loss dielectric materials with properties and references arranged in the order of increasing dielectric constant. Collects together in one source data on all new materials used in wireless communication Includes tabulated properties of all reported low loss dielectric materials In-depth treatment of dielectric resonator materials

Download or read book Dielectric Resonators for Use in Microwave and Millimeter Wave GaAs Circuits written by B. E. Spielman and published by . This book was released on 1983 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report represents the results of an investigation of dielectric resonators to be processed in GaAs substrates for application to microwave and millimeter-wave monolithic integrated circuits. Zeroth-and first order analyses are described. These analyses are applied to dielectric resonator structures to be formed in GaAs substrate material by etching an annular gap in the substrate, thereby effectively leaving a circular cylindrical disc of dielectric material to function as a resonator. Plots of geometric parameter variations with frequency are provided for these resonator structures. Tables are presented to show specific resonant structures for frequency-scaled microwave and non-scaled millimeter-wave resonators. Results are discussed, conclusions drawn, and suggestions for further work set forth. (Author).

Download or read book Microwave Analysis of Unconventional Superconductors with Coplanar Resonator Techniques written by Gianluca Ghigo and published by Springer Nature. This book was released on 2022-01-29 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a thorough overview of methods and approaches to the experimental characterization of superconductors at microwave frequencies, and includes a detailed description of the two main techniques, both based on the use of coplanar waveguide resonators, that the authors employed to investigate the properties of unconventional superconductors. In the second part several case studies are described, covering a large spectrum of materials and issues. Particular emphasis is given to recent hot topics concerning iron-based superconductors, both of fundamental nature and relevant for applications. The book is intended as a learning tool for researchers in the field, and serves as a guide providing inspiring examples of the use of coplanar resonator techniques to address key topics in the field of unconventional superconductivity.

Download or read book A Study of Whispering Gallery Modes in Microwave Dielectric Resonators Using Finite Integration Technique written by Siou Teck Chew and published by . This book was released on 1993 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dielectric Resonators written by Darko Kajfez and published by Noble Publishing. This book was released on 1998-01-01 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the definite reference text on dielectric resonators used in filters and oscillators. This second edition includes corrections and updates, a new chapter on how to use the program included on a new disk. Sections are devoted to properties of materials, coupling techniques and filter and oscillator design using dielectric resonators. Programs implement the models presented in the book and identify the frequencies of all the modes. Author's Comments After the first publication of Dielectric Resonators by Artech House ran out of print, the book was reprinted by Vector Forum, and that version is also out of print now. As the book has become a popular reference for microwave and RF engineers, it is hoped that the present second edition will be just as useful. No matter what the major use of dielectric resonators will be in the future, the prerequisite for an intelligent application is an understanding of the basic principles of these devices. This book aims to provide that understanding. Publisher's Comments With renewed interest in dielectric resonator technology for modern wireless communications equipment, this book is an excellent reference for its understanding and application. The accompanying programs provided on disk implement the models presented in the book and identify the frequencies of all resonance modes

Download or read book Whispering Gallery Mode Dielectric Resonator Oscillators written by Imtiaz U. Khairuddin and published by . This book was released on 1994 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years high permittivity whispering gallery mode (WGM) dielectric resonators (DR's) are showing more flexibility over their counterpart fundamental mode dielectric resonators. This is because of their high quality factors, good suppression of spurious modes and reasonable mechanical dimensions even at millimetres wavelength frequencies. For practical use, DR's are normally placed on top of substrates in order to couple with external microstrip lines. For this case a simple model based on dielectric waveguide is used in order to predict the microwave resonant frequencies of whispering gallery mode planar structured DRs. The measured resonant frequencies have shown an accuracy up to half a percent in most cases. A relatively simple mathematical model of the coupling between a dielectric resonator acting in WGE mode and a quasi-TEM mode microstrip line is proposed. Measured quality factors are found to be in good agreement with the proposed model. A relatively simple configuration of a WGM dielectric resonator oscillator employing shunt feedback and commercially available GaAs FET at 6.44 GHz is presented. Apart from having good efficiency, low frequency pushing and no hysteresis effect it features a low phase noise comparable to conventional dielectric resonator oscillators. Due to the restrictions imposed by conventional resonators, a stable low frequency source normally is multiplied up to millimetric frequencies. The characteristics of commercially available low parasitic mm-wave beam lead varactors have been employed for a simulated design of a frequency tripler from 18 GHz to 55 GHz. This design proved to be not only highly efficient, it most importantly could solve the design problems imposed by shunt-mounted packaged and chip varactor diodes in practice. The merits and de-merits of this conventional technique are then compared with the whispering gallery dielectric resonator mode oscillator.

Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1966-06 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt: