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What is a corner reflector antenna?

  • A.A dipole in front of two flat plates meeting at an angle
  • B.A reflector with its corners cut off to reduce the wind loading on it
  • C.A curved reflector whose surface is approximated by flat facets
  • D.A pair of reflectors used to fold the path in a dual reflector system

Answer: A

A corner reflector places a driven element in front of two flat sheets meeting at ninety or sixty degrees, and the images in the two planes reinforce the direct radiation, giving some ten to twelve decibels of gain from a very simple structure. It is cheap, broadband and easy to build. Faceted approximations, trimmed rims and folded paths describe other arrangements entirely. The image principle explains its behaviour completely, which is why it remains a textbook favourite.

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