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Multiple protocol transponder

  • US 7,016,311 B2
  • Filed: 04/09/2001
  • Issued: 03/21/2006
  • Est. Priority Date: 05/01/2000
  • Status: Active Grant
First Claim
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1. A multi protocol transponder for a communications network operative according to a communications protocol from a plurality of communications protocols under which the transponder is operative, the transponder comprising:

  • means for receiving a first RF signal transmitted according to the communications protocol;

    means for sequentially identifying the communications protocol from the first RF signal;

    means for executing the identified communications protocol to generate a second RF signal; and

    means for transmitting the second RF signal according to the identified communications protocol, wherein;

    said means for transmitting comprises;

    a transmit antenna;

    backscatter means for transforming the second RF signal to radiated energy by modulated backscatter; and

    active transmission means for transforming the second RF signal to radiated energy by active transmission, andthe means for executing the identified communications protocol having means for selecting either the backscatter means or the active transmission means for operation in response to the identified communications protocol.

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