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Directional planar spiral antenna

  • US 9,105,972 B2
  • Filed: 05/23/2012
  • Issued: 08/11/2015
  • Est. Priority Date: 08/20/2009
  • Status: Active Grant
First Claim
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1. A directional planar spiral antenna comprising:

  • a spiral antenna comprisinga feed-point configured to transfer energy to and from said spiral antenna,spiral shaped current paths,an antenna impedance;

    an energy absorbent backing;

    an energy absorbent siding coupled with said energy absorbent backing and further coupled with said spiral antenna;

    a cavity behind said spiral antenna and in front of a portion of said energy absorbent backing;

    a cable connector having an input impedance wherein said cable connector is coupled to the feed-point;

    a container configured to hold said spiral antenna, said energy absorbent backing, said energy absorbent siding, said cavity, said cable connector; and

    ,wherein said energy absorbent siding is located between edges of the spiral antenna and edges of the container and is also positioned underneath the spiral antenna and wherein said spiral shaped current paths at an outer portion of said spiral antenna overlap at least a portion of said energy absorbent siding.

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