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Conformal wide band surface wave radiating element

  • US 8,736,502 B1
  • Filed: 08/05/2009
  • Issued: 05/27/2014
  • Est. Priority Date: 08/08/2008
  • Status: Active Grant
First Claim
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1. An antenna element, comprising:

  • a top plate;

    a tapered feed, wherein the tapered feed is interconnected to and extends from the top plate, wherein the tapered feed has a length extending between a feed point and a tip, wherein the tapered feed has a depth, and wherein the depth of the tapered feed decreases from the feed point to the tip within a plane that is perpendicular to a portion of the top plate at which the tapered feed is joined to the top plate; and

    a ground plane forming a lens region, wherein the ground plane is interconnected to the top plate, wherein the lens region defines a cavity between the tapered feed and the ground plane, wherein the top plate defines at least a portion of an aperture that is adjacent at least a portion of the lens region, wherein the aperture overlies at least a portion of the cavity, wherein the aperture extends from a first edge proximate to the tip of the tapered feed to a second edge distal from the tip of the tapered feed and defined by the ground plane, wherein the cavity has a first depth proximate to the first edge of the aperture and a second depth proximate to the second edge of the aperture, wherein the first depth of the cavity is greater than the second depth of the cavity, and wherein the depth dimension of the cavity is parallel to the depth dimension of the tapered feed.

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