Microwave Transmission Lines and Cavities

Microwave Transmission Lines and Cavities

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The author of this book makes only a limited claim to the originality of this chapter. It has been rewritten from Chapter 10 of US Department of the Air Force Manual 52-8, entitled Radar Circuit Analysis, published June 30, 1951. The entire chapter has been retyped, edited, supplemented, and reformatted. Some of this was done to more closely conform to latter-day technical writing standards, some to add more current information, some for clarification, and some to make it more closely resemble the style of the other chapters of this book. Most importantly, no information has been deleted or diluted, and useful information has been added. All the illustrations have been retouched or redrawn, and all the labeling in the illustrations has been retyped.

Chapter Contents:

  • Origin of this Chapter
  • Introduction
  • The Beginning
  • Need to Know
  • Waveguides: Guided and Unguided Electromagnetic Waves
  • Propagation on Wires and in Space
  • Electromagnetic Waves in Space
  • First Discoveries
  • Waveguides versus RF Lines
  • Advantages of Waveguides
  • Disadvantages of Waveguide
  • Waveguide Theory and the Two Analogies
  • Waveguide as Compared to a Two-Wire rf Line
  • Effect of Different Frequencies on a Waveguide
  • Electromagnetic Fields in a Waveguide
  • The Electric Field
  • The Magnetic Field
  • Waveguide Propagation by Electric Waves
  • Path of Wavefronts in a Waveguide
  • The Wavefront Crossing Angle
  • Numbering System of the Modes
  • Rectangular Waveguides
  • Circular Waveguides
  • Counting Wavelengths for Measuring Modes
  • Introducing Fields into a Waveguide
  • Excitation with Electric Fields
  • Excitation with a Magnetic Field
  • Excitation with Electromagnetic Fields
  • Bends, Twists, Joints, and Terminations
  • Bends
  • Rotating the Field
  • Joints
  • Rotary Joints
  • T-Junctions
  • The ATR Switch
  • Matching Devices
  • Terminating a Waveguide
  • Cavity Resonators
  • The Fields in a Cavity
  • Cavity Excitation
  • Tuning the Cavity
  • Uses of Cavities
  • Waveguide Test Equipment
  • The Early Frequency Meter
  • The Slotted Line
  • The Directional Coupler
  • Review Questions
  • Answers to Review Questions

Inspec keywords: radar; transmission lines

Other keywords: air force manual 52-8; microwave cavity; radar circuit analysis; microwave transmission lines

Subjects: Waveguides and microwave transmission lines; Radar equipment, systems and applications

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