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Planar antenna array and article of manufacture using same

  • US 8,106,849 B2
  • Filed: 08/28/2009
  • Issued: 01/31/2012
  • Est. Priority Date: 08/28/2009
  • Status: Active Grant
First Claim
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1. A planar antenna array comprising:

  • a substrate; and

    a plurality of close-packed antenna elements numbering N where N is selected from the group consisting of 1 and 3x, x being a positive integer, the plurality of close-packed antenna elements being disposed on the substrate, each of the plurality of close-packed antenna elements including a substantially continuous photonic transducer arranged as an outwardly expanding generally logarithmic spiral having six turns,wherein each of the outwardly expanding generally logarithmic spirals is described according to the following polar equation;


    r=ae

    with e being the base of natural logarithms, a being an arbitrary positive real constant, and b a number relative to the relationship that when θ

    is a turn, direction b satisfies the equation e

    right/left


    .

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