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Antenna and Sensor System for Sharply Defined Active Sensing Zones

  • US 20110304437A1
  • Filed: 06/05/2011
  • Published: 12/15/2011
  • Est. Priority Date: 06/09/2010
  • Status: Abandoned Application
First Claim
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1. A compound antenna system having a sharply defined coverage zone, comprising:

  • an antenna structure having a feed point for coupling signals to and from said compound antenna system; and

    a shield structure;

    said shield structure disposed or extending forward from said antenna structure toward said coverage zone;

    said shield structure having an open aperture between said antenna structure and said coverage zone;

    said open aperture configured for allowing direct line of sight radio frequency communication between said antenna structure and objects within said coverage zone;

    said shield structure configured for providing radio frequency attenuation and/or blocking for signals from or to objects outside of said coverage zone;

    wherein an edge of said shield structure is aligned between said antenna structure and an edge of said coverage zone.

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