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Antenna & Wave PropagationBeamwidth

For a fixed physical aperture size, increasing operating frequency generally makes the antenna beam?

  • ANarrower
  • BWider
  • CUnchanged in every case
  • DIsotropic
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Correct Answer: A. Narrower
Explanation: Higher frequency means smaller wavelength, increasing electrical aperture size and generally narrowing the beam.
Reference: Standard antenna and wave propagation: beamwidth
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