Stripline Circulators – Theory and Practice

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.

Preface. 1. Architecture of Symmetrical Stripline Junction Circulators. 2. Tensor Permeability in a Magnetic Insulator. 3. Spatial Shape Demagnetizing Factors of Disk, Equilateral Triangle, 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 Terminated Circulator. 8. Cutoff Space of Cloverleaf Resonators with Magnetic Walls. 9. Standing Wave Solution of Wye Gyromagnetic Planar Resonator. 10. Planar Resonators with Triplets of Radial and Circumferential Magnetic Walls. 11. Unloaded Quality Factors of Junction Circulators. 12. The Lumped Element Circulator. 13. The Stripline Circulator Using a Gyromagnetic Planar Disk Resonator. 14. Green's Function Description of Junction Circulator. 15. Finite Element Formulation of Junction Circulator. 16. Circulators Using Triangular and Irregular Hexagonal Planar Resonators. 17. Operation of the Tracking and Semitracking Stripline Circulators. 18. Complex Gyrator Circuit of Negative Permeability Tracking and Semitracking Circulators. 19. Synthesis of Wideband Planar Circulators Using Narrow Coupling Angles. 20. Complex Gyrator Circuit of Three-Port Circulators Using Gyromagnetic Resonators with Sixfold Symmetry. 21. Open-Circuit Parameters of Circulators Using Side-Coupled Wye Resonators: An Impedance Pole Approach. 22. The Four-Port Single Junction Stripline Circulator. 23. Frequency Responses of Quarter-Wave Coupled Reciprocal Stripline Junctions. 24. Scattering Matrices of Junction Circulators with Chebyshev characteristics. 25. Synthesis of Stepped Impedance transducers. 26. Fabrication of UHF Circulators Using Irregular Hexagonal Gyromagnetic Resonators. 27. Fabrication of Very Weakly and Weakly Magnetized Microstrip circulators. 28. The Stripline Circulator: Theory and Practice. Bibliography. Index.