Slotted bifilar or quadrifilar helix antenna

  • US Patent No. 8314750
  • Issued: November 20, 2012
  • Status: Active

A slotted bifilar or quadrifilar helix antenna has a plurality of helical antenna elements. The antenna elements have an outer planar surface. A slot element is secured to an interior of the outer planar surface. The slot element extends radially inwardly to a slot element edge. At least two radially opposite slot element edges define a tapered slot. At a shorted point on the antenna, at least one radially opposite pair of slot elements are electrically shorted together. A feed point is axially offset from the shorted point along the antenna axis.

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