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Interrogator and tag of wireless communication system

  • US 20040150510A1
  • Filed: 03/28/2003
  • Published: 08/05/2004
  • Est. Priority Date: 03/28/2002
  • Status: Active Grant
First Claim
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1. A Tag for a wireless communication system including at least one Interrogator, the Interrogator transmitting a main carrier signal, said Tag transmitting a reflected signal to the Interrogator in response to reception of the main carrier signal, said Tag comprising:

  • a receiving/reflecting system that receives the main carrier transmitted by the Interrogator and transmits the reflected signal to the Interrogator;

    a modulated subcarrier signal hopping system, which includes;

    a frequency hopping system that applies frequency hopping to a subcarrier signal; and

    a subcarrier signal modulating system that modulates the subcarrier signal with a predetermined information signal;

    a main carrier modulating system that modulates the main carrier received through said receiving/reflecting system with the modulated subcarrier signal modulated by said subcarrier signal modulating system, the modulated main carrier being transmitted to the Interrogator through said receiving/reflecting system as the reflected signal.

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