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Antenna array of radiators with plural orthogonal ports

  • US 5,532,706 A
  • Filed: 12/05/1994
  • Issued: 07/02/1996
  • Est. Priority Date: 12/05/1994
  • Status: Expired due to Term
First Claim
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1. A phased array antenna comprising:

  • a plurality of radiators arranged in an array, each of said radiators comprising a first port and a second port and a radiating aperture electromagnetically coupled to said first port and to said second port, said first port introducing a first radiation with a first polarization, said second port introducing a second radiation with a second polarization orthogonal to said first polarization;

    first signal means having a first set of branches operatively coupling energy of said first radiation with the respective first ports of said radiators;

    second signal means having a second set of branches operatively coupling energy of said second radiation with the respective second ports of said radiators, said second signal means being operative independently of said first signal means; and

    beamformer means coupled to said first and said second signal means for forming at least one beam of electromagnetic power from said array of radiators, wherein said beamformer means comprises a first beamformer coupled to the first ports of respective ones of said radiators and a second beamformer coupled to the second ports of respective ones of said radiators, said first beamformer providing a first set of beams and said second beamformer providing a second set of beams independently of said first set of beams, wherein each set of beams comprises at least one beam, andwherein each of said beamformers comprises a plurality of branches, an individual one of said branches is coupled via a respective one of said signal means to a port of an individual one of said radiators, each of said branches of respective ones of said beamformers is bifurcated into two signal carrying paths to enable operation of said antenna in a mode of frequency reuse, each of said paths of each of said branches having a phase shifter and an attentuator.

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