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ANTENNA DEVICE

  • US 3,680,141 A
  • Filed: 11/30/1970
  • Issued: 07/25/1972
  • Est. Priority Date: 11/28/1969
  • Status: Expired due to Term
First Claim
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1. An antenna device comprising:

  • a main spherical reflector for reflecting electromagnetic waves;

    a sub-reflector disposed between the curvature center and reflecting surface of the main reflector so as to reflect electromagnetic waves to said surface and having a mirror surface which is arranged to compensate for the spherical aberration of said main spherical reflector;

    a parabolic reflector whose focal point is coincident with said curvature center so as to reflect electromagnetic waves to said sub-reflector;

    a primary radiator for radiating plane electromagnetic waves;

    a plane reflector for reflecting said electromagnetic waves to said parabolic reflector;

    means for rotating said sub-reflector around an axial line passing through said curvature center of said main spherical reflector, with the central axis of said sub-reflector directed to said curvature center; and

    means for moving said plane reflector in interlocking relationship with the rotation of said sub-reflector so as to cause the plane electromagnetic waves to be conducted from said primary radiator to said sub-reflector through said parabolic reflector.

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