Please download the dossier by clicking on the dossier button x
×

RIFID TAGS AND METHODS OF DESIGNING RFID TAGS

  • US 20090015407A1
  • Filed: 07/13/2007
  • Published: 01/15/2009
  • Est. Priority Date: 07/13/2007
  • Status: Abandoned Application
First Claim
Patent Images

1. A radio frequency identification (RFID) tag comprising:

  • a tag antenna;

    a matching circuit coupled to the tag antenna;

    a shorting device coupled to the tag antenna and the matching circuit, wherein conductivity of the shorting device affects a reflection coefficient of the tag antenna; and

    a tag circuit coupled to the matching circuit and the shorting device, the tag circuit configured to control the shorting device;

    wherein a difference between a reflection coefficient of the tag antenna when the shorting device is conductive and a reflection coefficient of the tag antenna when the shorting device is non-conductive is greater than or equal to approximately 0.8.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×