Directivity and the Antenna Beam

Directivity and the Antenna Beam

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In this chapter, the author discusses how the energy radiated by an antenna is distributed in angle and examine the salient characteristics of the radiation pattern - beamwidth, gain, and sidelobes. It was then shown how the sidelobes may be reduced; how fast, versatile beam positioning may be accomplished with electronic scanning; and how high angular resolution and angular measurement accuracy may be achieved. Finally, how the beam may be optimized for ground mapping is discussed.

Chapter Contents:

  • Distribution of Radiated Energy in Angle
  • Characteristics of the Radiation Pattern
  • Electronic Beam Steering
  • Angular Resolution
  • Angle Measurement
  • Antenna Beams for Ground Mapping

Inspec keywords: airborne radar; radar antennas; antenna radiation patterns

Other keywords: antenna energy radiation; antenna gain; electronic scanning; antenna sidelobe; angular measurement accuracy; versatile beam positioning; airborne radar; high angular resolution accuracy; antenna directivity; antenna beam; ground mapping; radiation pattern beamwidth

Subjects: Single antennas; Radar equipment, systems and applications; Antenna theory

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