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Microstrip antenna for RFID device

  • US 7,750,813 B2
  • Filed: 12/13/2006
  • Issued: 07/06/2010
  • Est. Priority Date: 12/14/2005
  • Status: Active Grant
First Claim
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1. A radio frequency identification transponder comprising:

  • a microstrip patch antenna;

    a first feed and a second feed, each feed being coupled with an edge of the microstrip patch antenna, and the first feed being approximately 180 degrees out of phase with the second feed; and

    a matching circuit coupling the first and second feeds with an integrated circuit.

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