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"Contents INTRODUCTION 1. RADAR IN WAR What Radar is Radar and the U-boats Radar in Naval Battles General Characteristics and Requirements 2. RADAR DISTINGUISHED FROM RADIO Relations among Frequency, Wave Length, Velocity Comparison of Power Transmitted and Received Power Received by a Radar Receiver Advantages of Microwaves 3. TRANSMISSION LINES, WAVE GUIDES, CAVITIES Characteristic Impedance of Infinite Line Electric and Magnetic Fields in Wave Guides Modes in Wave Guides The Magic or Hybrid T Resonance Effects in Wave Guides Evolution of the Cavity Resonator Segments of Transmission Lines Filters for Wave Guides 4. TUBES FOR RADAR OSCILLATORS Ineffectiveness of Ordinary Vacuum Tubes Movement of Charge Produces Current Operation of Magnetrons Manufacture of Magnetrons Klystrons 5. THE RECEIVER General Requirements of Radar Receiver Requirements of Superheterodyne in Radar Radar Crystals Local or Beating Oscillator Intermediate Amplifier Need for Frequency Control Details and Operation of Discriminator Video Amplifier 6. MODULATORS AND WAVE SHAPERS Phase Relations Production of sawtooth waves Multivibrators Electronic Switch Blocking Oscillator Pulse Transformer Modulator with Saturable Core Reactor Switch 7. INDICATORS AND CATHODE RAY TUBES Types of Indicators Electrostatic Cathode Ray Tube Cathode Ray Tube Screens Magnetic Cathode Ray Tube Sweep Circuit and Amplifier Producing Sweeps for Magnetically Controlled Indicators 8. ROTARY INDUCTORS Synchros Types of Synchro Combinations Synchro-generator Synchro-motor Resolvers D.C. Selsyns Servos Use of Servo-Amplifier with D.C. Motor Servo Employing an Amplidyne 9. TRANSMIT-RECEIVE DEVICES Purpose of T-R Switch Operation of T-R Switch Details of T-R Switch Cause of """"Spike"""" in Discharge Life of T-R Tube Details of Switching Action 10. ANTENNAS Antenna as Transmission Line Character of Fields Around Antennas Use of Reflectors with Antennas How Antennas are fed Effect of Earth on Transmission Radar Line of Sight Metal Lens Antenna II. OBSERVATIONS ON RADAR SYSTEMS Simple Radar in Block Form Three-centimeter Radar System Ten-centimeter Radar System Size of Target and Width of Beam Factors Determining Range of Radar Strength of Echo 12. MEASUREMENTS AND TESTING Measurements of Fields Important in Radar Wave Meters Echo Box Measurement of Low Power with Thermistor Measuring Loss in Dielectrics Care and Measurements of Magnetron Microwave Signal Generator 13. FUNDAMENTAL COMPONENTS IN RADAR Materials and Construction of Wire-wound Resistors Uses of Thermistors Materials and Properties of Coils Impedance of Transmission Lines in Practice Electromagnetic Delay Lines Lines with Distributed Parameters Methods of Varying Delay in Lines Bandwidth of Piezo-Electric Crystals Resistance Wire Treatment of Winding Noise Variable Condensers for Shift in Phase Converters Inverters Vibrators Circuit of a Vibrator General Requirements of Relays Magnetic Circuits of Relays Temperature Limitations of Relays Relation of Air Gap to Relay Operation 14. RADAR IN PEACETIME Guiding Airplanes for Landing Use of Beacons Navigating with Loran Radar as Altimeter Use of Radar to Prevent Collisions Corner Reflectors Limits of Radar Pseudo-Radar Radar in the Future GLOSSARY APPENDIX INDEX"

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