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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.

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Book Details

ISBN: 9780470258781
ISBN-10: 0470258780
Format: Hardback
(233mm x 164mm x 31mm)
Pages: 592
Imprint: Wiley-Blackwell
Publisher: John Wiley and Sons Ltd
Publish Date: 18-Jul-2008
Country of Publication: United States


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Author Biography - J. Helszajn

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.

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