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Tuning techniques for a slot antenna

  • US 6,642,897 B2
  • Filed: 04/18/2002
  • Issued: 11/04/2003
  • Est. Priority Date: 03/25/2000
  • Status: Expired
First Claim
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1. A device for identifying a container having a slot, comprising:

  • a wireless communication device mounted on the container to communicate remotely information associated with the container;

    a slot antenna formed by electronically associating said wireless communication device to the slot; and

    a variable reactance element including sub-elements whose proximity changes as a function of changes in a width associated with the slot, thereby changing reactance characteristics of said slot antenna.

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