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Antenna Parameters

Antenna Parameters

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Antennas: Fundamentals, design, measurement — Recommend this title to your library

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This book is primarily concerned with the electromagnetic design and performance of antennas. Often of almost equal practical importance are the mechanical design factors, some of which will be mentioned throughout the book in connection with related discussions of electromagnetic behavior. It is desirable, however, for the reader to have some general feeling for the structural factors in the design of antennas, as an aid in relating the somewhat abstruse electromagnetic concepts to real physical structures. A thumbnail sketch of some of these aspects of antenna design will be given here, before the definition of electromagnetic parameters is taken up.

Chapter Contents:

  • 3.1 Antenna Structures
  • 3.1.1 Size
  • 3.1.2 Supports
  • 3.1.3 Feed Lines
  • 3.1.4 Conductors
  • 3.1.5 Insulators
  • 3.1.6 Weather Protection
  • 3.2 Radiation Pattern
  • 3.2.1 Coordinate Systems
  • 3.2.2 Definition of Pattern
  • 3.2.3 Patterns in a Plane
  • 3.2.4 Absolute and Relative Patterns
  • 3.2.5 Near-Field and Far-Field Patterns
  • 3.2.6 Free-Space and Earth-Reflection Patterns
  • 3.3 Directivity and Gain
  • 3.3.1 Definitions of Directivity and Gain
  • 3.3.2 Solid Angle
  • 3.3.3 Radiation Intensity
  • 3.3.4 Directivity
  • 3.3.5 Gain
  • 3.4 Effective Area and Friis Transmission Equation
  • 3.5 Beamwidth
  • 3.5.1 Practical Significance of Beamwidth
  • 3.5.2 Beamwidth Definition
  • 3.5.3 Principal-Plane Beamwidths
  • 3.6 Minor Lobes
  • 3.7 Radiation Resistance and Efficiency
  • 3.8 Input Impedance
  • 3.9 Bandwidth
  • 3.10 Polarization
  • 3.11 Interdependencies of Gain, Beamwidths, and Aperture Dimensions
  • References
  • Problems and Exercises

Inspec keywords: antenna radiation patterns

Other keywords: electromagnetic behavior; antenna parameters; antenna performance; electromagnetic parameters; antenna electromagnetic design; thumbnail sketch; mechanical design factors

Subjects: Single antennas; Antenna theory

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