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Microwave circulator design / Douglas K. Linkhart

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Machine generated contents note: 1.Theory of Operation -- 1.1.Units, Conversions, and Symbols -- 1.2.The Physical Basis of Ferrimagnetism -- 1.3.Ferrimagnetic Resonance -- 1.4.Microwave Propagation in Ferrites -- 1.5.Other Technologies -- 1.5.1.Semiconductor Circulators -- 1.5.2.Nanotechnology Circulators -- 1.5.3.Thin Ferrite Films -- 1.5.4.Active Circulators -- 2.Circulator Specification -- 2.1.The Parameters -- 2.2.Reflections and Segmentation -- 2.3.Junction Circulators -- 2.3.1.Single-Ferrite (Non-Composite) Junction Circulators -- 2.3.2.Composite-Ferrite Junction Circulators -- 2.4.Lumped-Constant Circulators -- 2.5.Differential Phase Shift Circulators -- 2.6.Switching Circulators -- 2.7.Okada Circulators -- 2.8.Field-Displacement Isolators -- 2.9.Resonance Isolators -- 3.Applications of Circulators -- 3.1.Load Isolation -- 3.2.Duplexing -- 3.3.Multiplexing -- 3.4.Parametric Amplifiers -- 3.5.Phase Shifting -- 4.Material Selection -- 4.1.Ferrites -- 4.1.1.Ferrite Classes -- Contents note continued: 4.1.2.Ferrite Manufacturing -- 4.1.3.Design Considerations -- 4.1.4.Test Methods -- 4.1.5.Specifications -- 4.1.6.Temperature Effects -- 4.1.7.Ferrite Selection -- 4.2.Magnet Selection -- 4.3.Magnetic Compensating Material Selection -- 4.4.Dielectric Selection -- 4.5.Metals Selection -- 5.Electrical Design -- 5.1.Junction Circulators -- 5.1.1.Basic Principles -- 5.1.2.Historical Papers -- 5.1.3.Above-Resonance Approximations -- 5.1.4.Below-Resonance Approximations -- 5.1.5.Network Synthesis -- 5.1.6.Center Conductor Geometries -- 5.1.7.Waveguide Junction Geometries -- 5.1.8.Stripline Circulator Synthesis Algorithm -- 5.1.9.Microstrip Circulator Synthesis Algorithm -- 5.1.10.Waveguide Junction Circulator Synthesis Algorithm -- 5.1.11.Okada Circulators -- 5.1.12.Circulators Having Composite Ferrites -- 5.2.Lumped-Constant Circulators -- 5.3.Differential Phase Shift Circulators -- 5.4.Resonance Isolators -- 5.5.Dummy Loads for Isolators -- Contents note continued: 5.6.Temperature Effects -- 5.7.Intermodulation Distortion -- 5.8.RF Power Effects -- 5.8.1.Steady-State Thermal Effects -- 5.8.2.Transient Thermal Effects -- 5.8.3.Voltage Breakdown -- 5.8.4.Spin-Wave Instability -- 6.Magnetic Design -- 6.1.Magnet Sizing -- 6.1.1.Ferrite Demagnetization Factors -- 6.1.2.Leakage Flux Approximation -- 6.1.3.Approximate Design of Magnetic Circuits -- 6.1.4.Simulation of Magnetic Circuits -- 6.2.Shielding -- 6.3.Temperature Compensation -- 6.4.Completing the Circuit -- 6.5.Special Cases -- 6.5.1.Switching Circulators -- 6.5.2.Self-Biased Circulators -- 6.5.3.Considerations for Microstrip Circulators -- 7.Mechanical Design -- 7.1.Thermal Considerations -- 7.1.1.Stripline Power Handling -- 7.1.2.Power Dissipation in Ferrites -- 7.1.3.Cooling of Ferrites -- 7.2.Venting -- 7.3.Coaxial Junction Circulators -- 7.3.1.Packaging Techniques -- 7.3.2.Dimensional Tolerances -- 7.3.3.Controlling Cavity Resonances -- 7.3.4.Transitions -- Contents note continued: 7.3.5.RFI Control -- 7.3.6.Dissimilar Metals -- 7.3.7.Finishes -- 7.4.Lumped-Constant Circulators -- 7.5.Waveguide Circulators -- 7.6.Resonance Isolators -- 8.Assembly and Testing -- 8.1.Assembly Techniques -- 8.2.Testing -- 8.2.1.Finding the Operating Point -- 8.2.2.Taking Data -- 8.2.3.RF Power Testing -- 8.2.4.Intermodulation Testing -- 8.2.5.Multipaction Testing -- 8.2.6.Magnetic Moment Measurement -- 8.2.7.Measurement Uncertainty and Gauge Studies -- 9.Tuning -- 9.1.Interaction Between Magnetic and Electrical Adjustments -- 9.2.Magnetic Adjustment -- 9.2.1.Above-Resonance Magnetic Adjustment -- 9.2.2.Below-Resonance Magnetic Adjustment -- 9.2.3.Magnet Charging, Calibration, and Stabilization -- 9.3.Electrical Adjustment -- 9.4.Eigenvalue Evaluation -- 10.Design Examples -- 10.1.Introduction to Examples -- 10.2.Above-Resonance Stripline Junction Circulator -- 10.3.Below-Resonance Stripline Junction Circulator -- 10.4.Waveguide Junction Circulator -- Contents note continued: 10.5.Microstrip Circulator -- 10.6.Differential Phase Shift Circulator -- 10.7.Lumped-Constant Circulator

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