Waveguide Junction Circulators - Theory & Practice

Waveguide Junction Circulators brings together for the first time all the design aspects of this class of device. In a typical application the circulator allows a single antenna to be used for both transmission and reception. Together with semiconductor, passive and electronic devices, the circulator constitutes an essential building block in modern radar, satellite and telecommunication equipment. Features include:
* Examination of the properties and adjustments of the 3-port junction circulator and focus on the gyromagnetic resonator
* Description of the design of practical classic circulator arrangements
* Discussion of aspects of filter theory in the design of the classic 3-port junction circulator
* Consideration of practical concerns such as insertion loss and commercial specifications
Written by a leading academic authority and experienced industrial consultant, Waveguide Junction Circulators is a vital information source for designers working in microwave engineering. This valuable guide provides the academic researcher with a firm foundation in the theoretical aspects of this class of device whilst offering the industrial engineer an experimental platform for commercial design.

Joseph Helszajn,, PhD, is an international authority on non-reciprocal microwave circuits and devices. He has made a significant contribution to the characterization of the complex gyrator circuits and gain-bandwidth products of planar gyromagnetic resonators and other gyromagnetic devices. Professor Helszajn is a Fellow of the Institute of Electrical and Electronic Engineers, the City and Guilds Institute, the Royal Society of Edinburgh and the Royal Academy of Engineering. He previously authored thirteen books, nine of which were published by Wiley.

Architecture of Symmetrical Waveguide Junction Circulators.

Scattering Matrix of m-Port Junction.

Eigenvalue Adjustment of 3-Port Circulator.

Impedance Matrix of Junction Circulator.

The Post Gyromagnetic Resonator.

Okada Resonator.

Isotropic, Anisotropic and Gyromagnetic Circular Waveguides.

Isotropic and Anisotropic Open Circular Waveguides.

The Dielectric Cavity Resonator.

The Gyromagnetic Cavity Resonator.

Impedance in Rectangular, Ridge and Radial Waveguides.

Junction Circulator Using Post Resonators.

Complex Gyrator Circuit of a Waveguide Junction Circulator Using an Okada Resonator.

Degree-1 and 2 Okada Circulators.

An Evanescent Mode Okada Junction Circulator.

Complex Gyrator Circuit of an H-Plane Junction Circulator Using E-Plane Turnstile Resonators.

Complex Gyrator Circuit of an Evanescent-Mode E-Plane Junction Circulator Using H-Plane Turnstile Resonators.

Waveguide Circulators Using Triangular and Prism Resonators.

Synthesis of Quarter-Wave Coupled Junction Circulators with Degrees 1 and 2 Complex Gyrator Circuits.

The 4-Port Single Junction Waveguide Circulator.

Microwave Switching Using Junction Circulators.

Insertion Loss of Waveguide Circulators.

Synthesis of Stepped Impedance Transducers.

Experimental Evaluation of Junction Circulators.

Circulator Specifications.

Gyromagnetic Effect in Magnetic Insulator.

Index.