RADAR, THE ELECTRONIC EYE

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 Transm