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Antenna using proximity-coupled feed method, RFID tag having the same, and antenna impedance matching method thereof

  • US 7,629,929 B2
  • Filed: 09/25/2006
  • Issued: 12/08/2009
  • Est. Priority Date: 09/26/2005
  • Status: Expired due to Fees
First Claim
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1. An antenna, comprising:

  • a radiation patch for deciding a resonant frequency of the antenna;

    a ground plate disposed in parallel to the radiation patch; and

    a feeder disposed between the radiation patch and the ground plate in parallel for providing a RF signal to an element connected to the antenna,wherein the feeder includes;

    a microstrip feed line proximately coupled to the radiation patch by being formed perpendicularly to the resonant length direction of the radiation patch anda ground side disposed to be separated in the ground plate direction from the feed line in parallel wherein the ground side of the feeder is shorted from the ground plate in a direct current (DC) manner.

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