Crossed-field Microwave Devices V3

Crossed-field Microwave Devices V3

Principal Elements of Crossed-Field Devices

1st Edition - January 1, 1961

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  • Editor: G Mourier
  • eBook ISBN: 9780323143653

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Crossed-field Microwave Devices, Volume I: Principal Elements of Crossed-Field Devices focuses on the developments, trends, and approaches in the study of crossed-field microwave devices. The selection first offers information on periodic structures and cathode gun and its static characteristics. Discussions focus on circuits for traveling wave crossed-field tubes; effect of tolerance on interdigital lines; mode spectrum of strapped type magnetron; and electron gun optics and associated static characteristics of injection systems. The text then takes a look at noise and space-charge modes, including preoscillation phenomena in space-charge clouds below the main oscillation threshold; cutoff characteristics of the static magnetron diode; magnetron diode oscillations; and noise in crossed-field electron beams. The manuscript then examines the interaction of beams and circuits, as well as small and large signal theory and experiment. The selection is a valuable reference for readers interested in the elements of crossed-field microwave devices.

Table of Contents

  • Contributors to Volume I



    Contributors to Volume II

    Contents of Volume II

    Chapter 1 ∙ Introduction

    Chapter 2 ∙ Periodic Structures

    2.1 General Properties of Periodic Structures

    I. Fundamental Considerations about Delay Lines

    II. Floquet's Theorem

    III. Orthonormality Properties of the Modes

    IV. Equality of the Magnetic and Electric Energies Stored in a Cell

    V. Space Harmonics

    VI. Group Velocity and Energy Velocity

    VII. The Reactance Theorem and Dispersion

    VIII. Perturbations by a Current—General Cases

    IX. Babinet's Principle

    List of Symbols


    2.2 Theory of Bar Lines

    I. Transverse Modes on Infinite Arrays of Bars

    II. Periodic Array

    III. Calculation of the Characteristic Admittance and Space Harmonic Intensity

    List of Symbols


    2.3 Circuits for Traveling Wave Crossed-Field Tubes

    I. The Interdigital Line

    II. The Ladder Line

    III. The Helix and the Vane Type Line

    IV. A Biperiodic Structure: The Multiple Interdigital Line

    V. The Infinitely Thin Zigzag Line

    VI. Main Parameters of the Interdigital Line, Half Ladder Line, and Vane Type Line

    List of Symbols


    2.4 The Interdigital Line as a Waveguide

    I. Introduction

    II. Region I—Enclosed Region

    III. Region II—Energy Between Fingers

    IV. Region III—Interaction Space Side of Fingers

    V. Propagation Factor and Low-Frequency Cutoff

    VI. Solution for Impedance

    VII. Example of Calculated Results

    Appendix—Static Field Analysis for Region II

    List of Symbols


    2.5 The Effect of Tolerance on Interdigital Lines

    I. Continuous Small Periodic Errors

    II. Stepwise Systematic Error (Misregister)

    III. Stepwise Random Errors

    IV. Conclusions

    List of Symbols


    2.6 Measurements

    I. The Delay Factor

    II. The Coupling Impedance

    III. The Matching of the Input and Output Circuits

    IV. Attenuation of the Structure

    List of Symbols


    2.7 Mode Spectrum of Strapped Type Magnetron

    I. Strapped Type

    List of Symbols


    Chapter 3 ∙ The Cathode Gun and Its Static Characteristics

    3.1 The Cathode edited

    3.1.1 The Coated Types

    3.1.2 The Matrix Types

    3.2 Electron Gun Optics and Associated Static Characteristics of Injection Systems

    3.2.1 Beam Launching in High Power Crossed-Field Tubes

    3.2.2 Static Characteristics of Injection Crossed-Field Tubes

    3.2.3 A New Type of Crossed-Field Electron Gun

    Chapter 4 ∙ Dynamic Phenomena: Noise and Space-Charge Modes

    4.1 Preoscillation Phenomena in Space-Charge Clouds below the Main Oscillation Threshold

    I. Magnetron Theory and the "Steady State."

    II. The Failure of the Cutoff Relation

    III. The Nature of Preoscillation

    IV. A First-Order Theory for an Oscillating Double Stream Model

    V. Implications of the Theory

    VI. A Qualitative Picture of Magnetron Starting


    List of Symbols


    4.2 Symmetrical States and Their Breakup

    I. Introduction

    II. Thermal Spread

    III. Collisions

    IV. Relativity and Self-Magnetic Fields

    V. End Effects and Imperfections

    VI. Space Charge

    VII. Symmetrical Clouds

    VIII. Brillouin Flow in Planar Devices

    IX. The Establishment of the Brillouin State in Transience

    X. Stability

    XI. Rotating Axes—Larmor Frame

    XII. Rotating Axes—the Wave Frame

    XIII. The Threshold

    XIV. Efficiency of DC Energy Conversion, and Back-Bombardment

    XV. The Build-Up of Asymmetries

    XVI. Turbulence and Multiple Streaming

    List of Symbols


    4.3 Statistical Theory of the Magnetron Space Charge

    I. Introduction

    II. Phase-Space Description of the Space-Charge Distribution

    III. Approximate Determination of the Space-Charge Distribution

    IV. Confirmation and Conclusion

    List of Symbols


    4.4 Electron Interaction in the Static Magnetron

    I. Early Observations

    II. More Recent Experiments

    III. Present Status of the (Static) Magnetron Problem

    IV. Concluding Remarks

    List of Symbols


    4.5 Cutoff Characteristics of the Static Magnetron Diode

    I. Introduction

    II. The Current before Cutoff

    III. Thermal Effects at Cutoff

    IV. The Magnetron Diode after Cutoff

    List of Symbols


    4.6 Magnetron Diode Oscillations

    I. Introduction and General Discussion

    II. Theory of Velocity-Resonance Oscillations

    III. Experimental Observations of Oscillations

    IV. Conclusions

    List of Symbols


    4.7 Noise in Magnetrons

    I. Sources of Noise

    List of Symbols


    4.8 Noise in Crossed-Field Electron Beams

    I. Introduction

    II. Review of Experiments

    III. Reviews of Theoretical Investigations

    IV. Conclusions

    List of Symbols


    4.9 Enhanced Emission

    I. Introduction

    II. Enhanced Emission from Pure Metal Cathodes

    III. Present Understanding of Enhanced Emission

    IV. Significance of Enhanced Emission in Magnetron Design and Development

    List of Symbols


    Chapter 5 ∙ Dynamic Phenomena: Interaction of Beams and Circuits

    5.1 Small Signal Theory and Experiment

    5.1.1 The RF Theory of Crossed-Field Devices

    5.1.2 Small Signal Theory

    5.2 Large Signal Theory and Experiment

    5.2.1 Comments about Large Signal Theory

    5.2.2 Nonlinear Theory of Injected-Beam Crossed-Field Devices

    5.2.3 Crossed-Field Electron Interaction in Space-Charge Limited Beams

    5.2.4 The Large Signal Behavior of Crossed-Field Traveling Wave Devices

    5.2.5 Numerical Analysis of Beam Type Crossed-Field Traveling Wave Tubes

    5.2.6 Planar Magnetron Theory and Applications

    5.2.7 Effect of the Elimination of Higher-Order Space Harmonics on Magnetron Characteristics

    5.2.8 Calculation of the Performance Chart of a Magnetron

    5.2.9 Space-Charge Considerations of Magnetrons

    5.2.10 Field Patterns and Oscillation Build-Up in Magnetrons

    Appendix to Volume I

    Subject Index

Product details

  • No. of pages: 670
  • Language: English
  • Copyright: © Academic Press 1961
  • Published: January 1, 1961
  • Imprint: Academic Press
  • eBook ISBN: 9780323143653

About the Editor

G Mourier

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