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System and method for tracking medical articles

  • US 9,916,427 B2
  • Filed: 12/28/2015
  • Issued: 03/13/2018
  • Est. Priority Date: 12/07/2009
  • Status: Active Grant
First Claim
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1. A system for reading a data carrier that is attached to an article, the data carrier being responsive to electromagnetic energy (EM) of a frequency f1 in response to which the data carrier provides unique identification data, the system comprising:

  • an enclosure having electrically conductive walls, the enclosure has a natural frequency of resonance f2 wherein the frequency f1 is different from the natural frequency of resonance of the enclosure f2;

    a probe mounted at one of the walls of the enclosure, the probe configured to inject EM into the enclosure, the position of the probe being selected so that reflected phase of EM from the walls is equal and in phase at the probe position wherein the position of the probe in relation to the walls of the enclosure is selected to optimize power transfer into the enclosure;

    a storage device located within the enclosure configured to receive data carriers with respective articles to be stored; and

    a receiving antenna disposed within the enclosure and configured to receive the unique identification data provided by the data carriers.

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