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Versatile anttenna array for multiple pencil beams and efficient beam combinations

  • US 5,784,031 A
  • Filed: 02/28/1997
  • Issued: 07/21/1998
  • Est. Priority Date: 02/28/1997
  • Status: Expired due to Term
First Claim
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1. Apparatus for generating a desired radiation pattern using a multiple element antenna array, said desired radiation pattern including a plurality of spatially overlapping beams, said apparatus comprising:

  • a plurality of exciter inputs, each exciter input accepting an excitation signal for a corresponding beam of said desired radiation pattern;

    a beamforming network that receives each said excitation signal and generates an output signal for each element of said array so that said array outputs said desired radiation pattern; and

    an exciter input for every other beam of said desired radiation pattern including a substantially 180 degree phase shifter to apply a substantially 180 degree phase shift prior to input to said beamforming network to minimize interference between adjacent beams of said desired radiation pattern.

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