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System for multi-standard RFID tags

  • US 20040085191A1
  • Filed: 08/21/2003
  • Published: 05/06/2004
  • Est. Priority Date: 01/06/2000
  • Status: Active Grant
First Claim
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1. An interrogator for a radio identification system having a plurality of tags, selected ones of said tags operating at a first frequency, and said other tags operating at another frequency, said interrogator comprising:

  • (a) a first radio frequency module having a transmitter for transmitting an output signal at said first frequency to said tags, and including a receiver for receiving return signals transmitted by said tags operating at said first frequency;

    (b) a second radio frequency module having a transmitter for transmitting an output signal at said second frequency to the tags, and including a receiver for receiving return signals transmitted by said tags operating at said second frequency;

    (c) a controller module coupled to said first and second radio frequency modules, said controller module including means for controlling said transmitters for transmitting said output signals to said tags, and including decoder means for decoding said return signals received from said tags.

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