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Focused field antenna for passive RFID tire pressure sensor tranponder

  • US 8,573,047 B2
  • Filed: 06/08/2012
  • Issued: 11/05/2013
  • Est. Priority Date: 07/27/2009
  • Status: Active Grant
First Claim
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1. A passive RFID transponder sensor system providing a transponder antenna serving a dual function of housing, a transponder sensor and increasing magnetic flux collecting area of the RFID transponder sensor system, comprising:

  • an electronic sensor device; and

    a transponder antenna, including an electrical transponder coil electrically connected to said electronic sensor device, said transponder antenna including an enclosure formed of a magnetically permeable metal within which said electrical transponder coil is disposed, said enclosure including a transponder antenna stem having a top portion with an exterior side configured to receive a magnetic flux entering said transponder antenna stem, and said enclosure including a portion configured to direct said magnetic flux through said electrical transponder coil.

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