Download or read book Microwave Properties of Partially Magnetized Ferrites written by Jerome J. Green and published by . This book was released on 1968 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The microwave properties of partially magnetized materials have been investigated. The real parts of the components of the permeability tensor have been measured as a function of the ratios of saturation magnetization to angular frequency and average magnetization to angular frequency and location on the magnetic hysteresis loop on a yttrium iron garnet (YIG) and magnesium manganese ferrite (MgMnF). The high power threshold has been measured on YIG as a function of sample shape, the polarization of the rf magnetic field and the orientation of the rf field to the static magnetization. The Suhl and Schloemann theories for high power non-linearity have been extended to include arbitrary ellipsoids, linearly polarized rf magnetic field, anti-Larmor circularly polarized rf magnetic field, and arbitrary orientation between the rf magnetic field and the static magnetization.

Download or read book The Use of Ferrites at Microwave Frequencies written by L. Thourel and published by Elsevier. This book was released on 2016-10-27 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Use of Ferrites at Microwave Frequencies describes the applications of ferrites at microwave frequencies and the apparatus involved. Topics covered range from the properties of ferrites to gyromagnetic and non-reciprocal effects, ferrite isolators, circulators, and modulators. The use of ferrites in variable frequency filter cavities is also discussed. Mathematical explanations are reduced to the strict minimum and only the results of calculations are indicated. This book consists of seven chapters and opens with a review of the theory of magnetism, touching on subjects such as the BOHR magneton, diamagnetism and paramagnetism, ferromagnetism and antiferromagnetism, ferrimagnetism, and demagnetizing. The next chapter deals with the elementary theory of gyromagnetic effects and covers the kinetic moment theorem, precession of the spin moment, gyromagnetic resonance, complex permeability, and gyromagnetic effects in the atom. The reader is then introduced to ferrites and their properties; non-reciprocal effects and their applications; and ferrite isolators, circulators, and modulators. The final chapter describes the use of ferrites in the design of cavities whose resonant frequency is controlled by a magnetic field or filters with variable characteristics. This monograph is written primarily for microwave and electronics engineers.

Download or read book Ferrites at Microwave Frequencies written by A. J. Baden Fuller and published by IET. This book was released on 1987 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes a full mathematical treatment of the interaction of an electromagnetic wave with a gyromagnetic ferrite material.

Download or read book Detection of Spinwave Instability Thresholds in Partially Magnetized Ferrites Using Dielectric Resonators written by Michael Geiler and published by . This book was released on 2016 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: Yittrium Iron Garnet Y2́3Fe2́6O2́12́2 and Lithium ferrite LiFe2́5O2́8 mono and poly crystals were investigated for their spinwave linewidth Î4Hk, ferromagnetic resonance linewidth Î4H and complex magnetic losses Îơ' and Îơ'' at L and S bands. Conventional methods of Spinwave linewidth typically require very high power microwave sources and associated high power components. Therefore, we developed a Dielectric Resonator (DR) based test method that allows for measurement of Î4Hk using low power, common microwave laboratory equipment, while providing additional capability to measure the other relevant magnetic material characteristics. The samples used in this research were 0.030" diameter, abrasive milled spheres provided by Pacific Ceramics Inc, and Ferrisphere Inc. and included a variety of standard off-the-shelf material offerings. The saturation magnetization Ms of the samples ranged from 75 Gauss to 3700 Gauss. The Î4H and Î4Hk of the samples were in the ranges of 0.5 to 200 Oersteds, and 0.5 to 30 Oersteds, respectively. Practical frequencies of operation for this system are 1 GHz to 20 GHz with less than 20W required RF power. Operation below 1 GHz and up to 40 GHz is possible. Reduction of intrinsic Ms in YIG in achieved by doping with Gadolinium and/or Aluminum. These additions were found to affect the microwave properties of the materials as well. Dopants like Cobalt, Manganese and Holmium do not effect the saturation magnetization but they do alter the high power microwave properties of the material similarly to Gd and Al. Several DRs were designed and modeled using Ansys HFSS electromagnetic finite element solver. We designed experiments that allow the measurement of all relevant microwave properties in one convenient test setup. This includes simultaneous control of multiple variables including RF field, frequency and power, and DC field strength.

Download or read book Microwave Ferrites and Ferrimagnetics written by Benjamin Lax and published by . This book was released on 1962 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research on Selected Microwave Properties of Ferrites Final Report written by Stanford University. Microwave Laboratory and published by . This book was released on 1965 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research on Selected Microwave Properties of Ferrites Quarterly Status Report No 6 written by Stanford University. Microwave Laboratory and published by . This book was released on 1963 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theory and Application of Ferrites written by Ronald F. Soohoo and published by . This book was released on 1960 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theory of ferrites -- Their science and technology -- Properties of matter in the solid state -- Dielectric properties of ferrites -- Magnetic properties of ferrites -- The permeability tensor -- Eddy current, hysterisis, and residual losses in ferrites -- Measurements of ferrite properties -- Propagation of electromagnetic waves in infinite anisotropic media -- Propagation of electromagnetic waves through anisotropic waveguides -- Application of ferrites below microwave frequencies -- Longitudinal field devices -- Transversely magnetized ferrite devices -- Dielectric loading and tapered field devices -- Field displacement devices -- Cutoff phenomena in magnetized ferrites -- Nonlinear ferrite devices -- System application of ferrite devices -- Mathematical formulae -- Derivation of the perturbation relations -- Transcendental equation involving the propagation constant -- Discussion of gaussian and mks practical units -- Some design problems of microwave ferrite devices.

Download or read book Research on Selected Microwave Properties of Ferrites Quarterly Status Report No 2 written by Stanford University. Microwave Laboratory and published by . This book was released on 1963 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ferrites at Microwave Frequencies written by Aleksandr Grigor'evich Gurevich and published by . This book was released on 1963 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research of Selected Microwave Properties of Ferrites written by and published by . This book was released on 1962 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Components and Devices written by T. Koryu Ishii and published by Elsevier. This book was released on 2013-10-22 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Microwave Technology, Volume I: Components and Devices is a compact reference tool which provides both the fundamentals and applications of microwave technology. This volume covers components and devices used in microwave circuits. Chapters in the book discuss topics on microwave transmission lines, microwave resonators, and microstrip line components. Microwave impedance matching techniques, applications of microwave thermionic density modulated devices, and microwave transistor oscillators and amplifiers are tackled as well. Technicians, scientists, engineers, and science and engineering students who are involved in microwave technology will find the text very useful.

Download or read book Research on Selected Microwave Properties of Ferrites Quarterly Status Report No 10 written by Stanford University. Microwave Laboratory and published by . This book was released on 1964 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research on Selected Microwave Properties of Ferrites Quarterly Status Report No 9 written by Stanford University. Microwave Laboratory and published by . This book was released on 1964 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research on Selected Microwave Properties of Ferrites Quarterly Status Report No 3 written by Stanford University. Microwave Laboratory and published by . This book was released on 1963 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Microwave Technology written by T. Koryu Ishii and published by Academic Press. This book was released on 1995-10-16 with total page 705 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Microwave Technology