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Balanced dual-band embedded antenna

  • US 8,659,483 B2
  • Filed: 02/29/2012
  • Issued: 02/25/2014
  • Est. Priority Date: 02/29/2012
  • Status: Active Grant
First Claim
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1. A planar antenna, comprising:

  • a dielectric layer; and

    a first conductive layer mechanically coupled to the dielectric layer, the first conductive layer comprising;

    a first arm having a shape defined by a first outer border comprising a first conic section and a first inner border comprising a second conic section;

    a feed line coupled to the first arm at a feedpoint location at or near a central axis of the first arm; and

    a second arm offset from the first arm along the central axis of the first arm, the second arm defined by a shape at least in part mirroring a shape of the first arm; and

    wherein at least a portion of the feed line bifurcates the second arm into at least two portions;

    wherein the at least two portions of the second arm are conductively coupled to a return conductor;

    wherein the first and second arms comprise respective conductive strips including a lateral width that varies along the central axis;

    wherein the respective conductive strips include a lateral width tapering from a wider width near the feedpoint location to a narrower width away from the feedpoint location; and

    wherein the respective conductive strips include a lateral width that widens again at respective distal tips of the conductive strips away from the feedpoint location.

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