The Stripline Circulators

Beschreibung

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.

Autor*in

J. Helszajn

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Antennas & Propagation Communication Technology Electrical & Electronics Engineering Elektrotechnik u. Elektronik Kommunikationstechnik Mikrowellen- u. Hochfrequenztechnik u. Theorie Mikrowellentechnik RF / Microwave Theory & Techniques Sende- u. Empfangseinrichtungen

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