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Author: Joseph Helszajn
Publisher: John Wiley & Sons
ISBN: 0470264144
Category : Technology & Engineering
Languages : en
Pages : 450
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Book Description
Stripline circulator theory and applications from the world's foremost authority The stripline junction circulator is a unique three-port non-reciprocal microwave junction used to connect a single antenna to both a transmitter and a receiver. Its operation relies on the interaction between an electron spin in a suitably magnetized insulator with an alternating radio frequency magnetic field. In its simplest form, it consists of a microwave planar gyromagnetic resonator symmetrically coupled by three transmission lines. This book explores the magnetic interaction involved in the stripline circulator's operation, the nature of the microwave resonator shape, and the network problem that arises in coupling the microwave resonator to the microwave circuit. The stripline circulator is an important device met across a wide range of industries, including wireless, military, radar, and satellite communications. The book's design tables are a unique feature, offering valuable design support. Written by an international authority on non-reciprocal microwave circuits and devices, the book is organized into logical blocks of chapters that focus on specific effects and circuit aspects of the stripline circulator. Among the highlights of coverage are: Spatial shape demagnetizing factors of magnetic insulators Standing wave solutions of wye gyromagnetic planar resonators Lumped element circulators Negative permeability tracking and semi-tracking circulators Four-port single-junction circulators Fabrication of very weakly and weakly magnetized microstrip circulators The final chapter explores important and continuing discrepancies between theoretical models and actual practice. For designers building circulators, isolators, and phase shifters; researchers working on the limitation of ferrite devices; and graduate students intending to work in the field, Dr. Helszajn's insights and perspectives are invaluable.
Author: Joseph Helszajn
Publisher: John Wiley & Sons
ISBN: 0470264144
Category : Technology & Engineering
Languages : en
Pages : 450
Get Book Here
Book Description
Stripline circulator theory and applications from the world's foremost authority The stripline junction circulator is a unique three-port non-reciprocal microwave junction used to connect a single antenna to both a transmitter and a receiver. Its operation relies on the interaction between an electron spin in a suitably magnetized insulator with an alternating radio frequency magnetic field. In its simplest form, it consists of a microwave planar gyromagnetic resonator symmetrically coupled by three transmission lines. This book explores the magnetic interaction involved in the stripline circulator's operation, the nature of the microwave resonator shape, and the network problem that arises in coupling the microwave resonator to the microwave circuit. The stripline circulator is an important device met across a wide range of industries, including wireless, military, radar, and satellite communications. The book's design tables are a unique feature, offering valuable design support. Written by an international authority on non-reciprocal microwave circuits and devices, the book is organized into logical blocks of chapters that focus on specific effects and circuit aspects of the stripline circulator. Among the highlights of coverage are: Spatial shape demagnetizing factors of magnetic insulators Standing wave solutions of wye gyromagnetic planar resonators Lumped element circulators Negative permeability tracking and semi-tracking circulators Four-port single-junction circulators Fabrication of very weakly and weakly magnetized microstrip circulators The final chapter explores important and continuing discrepancies between theoretical models and actual practice. For designers building circulators, isolators, and phase shifters; researchers working on the limitation of ferrite devices; and graduate students intending to work in the field, Dr. Helszajn's insights and perspectives are invaluable.
Author: Mark Russell Doyle
Publisher:
ISBN:
Category :
Languages : en
Pages : 72
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 22
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Book Description
New interest is shown in modernization of ferrite component technology. The workhorse of ferrite components is the Y-junction circulator; it is used as a 3-port circulator, 2-port isolator, or a single-p throw switch. For new technology it is useful to increase bandwidth capability, minimize size, and create designs compatible with monolithic circuits. Until now there has been no publicly available circulator analysis computer program. A concise compendium on microwave ferrite Y-junction circulators is provided in this report. It consists of background and tutorial information on ferrite media, junction circulator theory and evolution, modern improvements in the theory that permit wideband analysis, inclusion of dielectric losses in the ferrite, and a listing for a FORTRAN computer program to perform wideband circulator performance analysis. This theoretical information and computer program will be useful for further work on optimization of circulator bandwidth, size, and monolithic circuit compatibility. Also, it will be useful in examining quantitatively the effects of dielectric losses.
Author: A. J. Baden Fuller
Publisher: IET
ISBN: 9780863410642
Category : Technology & Engineering
Languages : en
Pages : 296
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Book Description
Includes a full mathematical treatment of the interaction of an electromagnetic wave with a gyromagnetic ferrite material.
Author: K.H.J. Buschow
Publisher: Elsevier
ISBN: 0444563776
Category : Science
Languages : en
Pages : 375
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Book Description
Volume 20 of the Handbook of Magnetic Materials, as the preceding volumes, has a dual purpose. As a textbook it is intended to help those who wish to be introduced to a given topic in the field of magnetism without the need to read the vast amount of literature published. As a work of reference it is intended for scientists active in magnetism research. To this dual purpose, Volume 20 is composed of topical review articles written by leading authorities. In each of these articles an extensive description is given in graphical as well as in tabular form, much emphasis being placed on the discussion of the experimental material in the framework of physics, chemistry and material science. It provides readers with novel trends and achievements in magnetism. Composed of topical review articles written by leading authorities Intended to be of assistance to those who wish to be introduced to a given topic in the field of magnetism As a work of reference it is intended for scientists active in magnetism research Provide the readership with novel trends and achievements in magnetism
Author: T. Okoshi
Publisher: Springer Science & Business Media
ISBN: 3642700837
Category : Science
Languages : en
Pages : 215
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Book Description
Until recently, three principal classes had been known in the electrical cir cuitry. They were as follows: 1) The lumped-constant circuit, which should be called a zero-dimensional circuit, in the sense that the circuit elements are much smaller in size as compared with the wavelength in all three spatial directions. 2) The distributed-constant circuit, which should be called a one-dimensional circuit, in the sense that the circuit elements are much smaller than the wavelength in two directions but comparable to the wavelength in one di rection. 3) The waveguide circuit, which should be called a three-dimensional circuit, in the sense that the circuit elements are comparable to the wavelength in all three directions. The principal subject of this book is the analysis and design (synthesis) theories for another circuit class which appeared in the late 1960s and became common in the 1970s. This new circuit class is 4) the planar circuit, which should be called a two-dimensional circuit, in the sense that the circuit elements are much smaller in size as compared with the wavelength in one direction, but comparable to the wavelength in the other two directions.
Author: Douglas K. Linkhart
Publisher: Artech House
ISBN: 1608075834
Category : Technology & Engineering
Languages : en
Pages : 386
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Book Description
Circulator design has advanced significantly since the first edition of this book was published 25 years ago. The objective of this second edition is to present theory, information, and design procedures that will enable microwave engineers and technicians to design and build circulators successfully. This resource contains a discussion of the various units used in the circulator design computations, as well as covers the theory of operation. This book presents numerous applications, giving microwave engineers new ideas about how to solve problems using circulators. Design examples are provided, which demonstrate how to apply the information to real-world design tasks.
Author: L. Thourel
Publisher: Elsevier
ISBN: 1483164551
Category : Technology & Engineering
Languages : en
Pages : 115
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Book Description
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.
Author: Theodore E. Kyriak
Publisher:
ISBN:
Category : Soviet Union
Languages : en
Pages : 542
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Book Description
Author: Richard Wallace
Publisher: Artech House
ISBN: 1630810096
Category : Technology & Engineering
Languages : en
Pages : 393
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Book Description
This authoritative new resource provides an overview and introduction to working with RF, microwave, and high frequency components. From transmission lines, antennas, millimeter waves, ferrites, hybrids, power dividers and filters, this book focuses on practical, time-to-market issues to help with projects in the field. Keeping mathematics to a minimum, this comprehensive volume is packed with over 700 illustrations that help clarify key concepts. The reader will gain an in-depth understanding of the special characteristics exploited in microwave and high frequency design. The book is also used in industrial training courses.
