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WIDE-ANGLE PLANAR-BEAM ANTENNA ADAPTED FOR CONVENTIONAL OR DOPPLER SCAN USING DIELECTRIC LENS

  • US 3,795,002 A
  • Filed: 12/18/1972
  • Issued: 02/26/1974
  • Est. Priority Date: 12/18/1972
  • Status: Expired due to Term
First Claim
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1. An antenna system for radiating planar beams scannable in a first angular coordinate and of substantially constant beam width in the same angular coordinate over a wide range of angles in a second orthogonal angular coordinate, comprising:

  • a dielectric lens in the shape of a partial toroid having circular-shaped inside and outside perimeter surfaces and a full circle cross-sectional shape in a plane containing the axis of said toroid;

    a plurality of parallel-plate wave guide feeds coupled to said lens along a portion of said inside perimeter, said parallelplate wave guides being normal to the axis of said toroid and spaced in the direction of said axis, said parallel-plate wave guides further having their apertures abutting the inside surface of said toroid;

    a scan feed array including a first linear array of antenna elements;

    a plurality of second linear arrays of antenna elements, one within each of said parallel-plate wave guide feeds; and

    a plurality of coupling transmission lines for coupling each element of said first linear array in parallel with corresponding elements in each of said second linear arrays.

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