Helszajn The Stripline Circulators

Theory and Practice
1. Auflage 2008
ISBN: 978-0-470-26414-0
Verlag: John Wiley & Sons
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, Band 1, 608 Seiten, E-Book

Reihe: Wiley Series in Microwave and Optical Engineering

Stripline circulator theory and applications from the world'sforemost authority
The stripline junction circulator is a unique three-portnon-reciprocal microwave junction used to connect a single antennato both a transmitter and a receiver. Its operation relies on theinteraction between an electron spin in a suitably magnetizedinsulator with an alternating radio frequency magnetic field. Inits simplest form, it consists of a microwave planar gyromagneticresonator symmetrically coupled by three transmission lines.
This book explores the magnetic interaction involved in thestripline circulator's operation, the nature of the microwaveresonator shape, and the network problem that arises in couplingthe microwave resonator to the microwave circuit. The striplinecirculator is an important device met across a wide range ofindustries, including wireless, military, radar, and satellitecommunications. The book's design tables are a unique feature,offering valuable design support.
Written by an international authority on non-reciprocalmicrowave circuits and devices, the book is organized into logicalblocks of chapters that focus on specific effects and circuitaspects of the stripline circulator. Among the highlights ofcoverage are:
* Spatial shape demagnetizing factors of magnetic insulators
* Standing wave solutions of wye gyromagnetic planarresonators
* Lumped element circulators
* Negative permeability tracking and semi-tracking circulators
* Four-port single-junction circulators
* Fabrication of very weakly and weakly magnetized microstripcirculators
The final chapter explores important and continuingdiscrepancies between theoretical models and actual practice. Fordesigners building circulators, isolators, and phase shifters;researchers working on the limitation of ferrite devices; andgraduate students intending to work in the field, Dr. Helszajn'sinsights and perspectives are invaluable.

Autoren/Hrsg.

Helszajn, J.

Inhaltsverzeichnis

Preface.
1. Architecture of Symmetrical Stripline JunctionCirculators.
2. Tensor Permeability in a Magnetic Insulator.
3. Spatial Shape Demagnetizing Factors of Disk, EquilateralTriangle, and Irregular Hexagonal Magnetic Insulators.
4. Scattering Matrix of m-Port Junction.
5. Eigenvalue Adjustment of Three-Port Circulator.
6. Impedance Matrix of Junction Circulator.
7. The One-Port Topology of the Degree-1 and Degree-2 TerminatedCirculator.
8. Cutoff Space of Cloverleaf Resonators with MagneticWalls.
9. Standing Wave Solution of Wye Gyromagnetic PlanarResonator.
10. Planar Resonators with Triplets of Radial andCircumferential Magnetic Walls.
11. Unloaded Quality Factors of Junction Circulators.
12. The Lumped Element Circulator.
13. The Stripline Circulator Using a Gyromagnetic Planar DiskResonator.
14. Green's Function Description of Junction Circulator.
15. Finite Element Formulation of Junction Circulator.
16. Circulators Using Triangular and Irregular Hexagonal PlanarResonators.
17. Operation of the Tracking and Semitracking StriplineCirculators.
18. Complex Gyrator Circuit of Negative Permeability Trackingand Semitracking Circulators.
19. Synthesis of Wideband Planar Circulators Using NarrowCoupling Angles.
20. Complex Gyrator Circuit of Three-Port Circulators UsingGyromagnetic Resonators with Sixfold Symmetry.
21. Open-Circuit Parameters of Circulators Using Side-CoupledWye Resonators: An Impedance Pole Approach.
22. The Four-Port Single Junction Stripline Circulator.
23. Frequency Responses of Quarter-Wave Coupled ReciprocalStripline Junctions.
24. Scattering Matrices of Junction Circulators with Chebyshevcharacteristics.
25. Synthesis of Stepped Impedance transducers.
26. Fabrication of UHF Circulators Using Irregular HexagonalGyromagnetic Resonators.
27. Fabrication of Very Weakly and Weakly Magnetized Microstripcirculators.
28. The Stripline Circulator: Theory and Practice.
Bibliography.
Index.

Über Autor(innen)

Joseph HELSZAJN, PhD, DSc, is a Chartered Engineer and a Fellow of the Institution of Electrical Engineers, the Institute of Electrical and Electronic Engineers, the City and Guilds Institute, the Royal Society of Edinburgh, and the Royal Academy of Engineering. He is the recipient of the 1995 Institution of Electrical Engineers J.J. Thomson Medal and was appointed an Officer of the Order of the British Empire in the 1997 Queen's Birthday Honours List. Dr. Helszajn is the recipient of the honorary degree of Doctor of Engineering from Napier University (2004) and the honorary degree of Doctor of the University from Heriot-Watt University (2007), both located in the United Kingdom.