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High gain, frequency tunable variable impedance transmission line loaded antenna having shaped top plates

  • US 6,486,844 B2
  • Filed: 05/31/2001
  • Issued: 11/26/2002
  • Est. Priority Date: 08/22/2000
  • Status: Expired due to Term
First Claim
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1. An antenna comprising:

  • a conductive plate;

    a first conductive element having a first edge;

    a second conductive element having a first edge electrically connected to said conductive plate said second conductive element further including a second edge opposingly spaced apart from the first edge of said second conductive element;

    a shaped conductive element having a plurality of independently excitable regions, wherein current flow through one or more of said regions determines the effective length of the antenna, and wherein a first location of said shaped conductive element spaced proximate to the first edge of said first conductive element so as to create a gap there between, and wherein a second location of said shaped conductive element is spaced proximate to the second edge of said second conductive element so as to create a gap there between;

    a first meanderline coupler electrically connected between said first conductive element and said shaped conductive element so as to provide a path across the gap there between;

    second meanderline coupler electrically connected between said second conductive element and said shaped conductive element so as to provide a conductive path across the gap there between; and

    wherein said first and said second meanderline couplers have a selectable electrical length.

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