Multi-level RF identification system
Abstract
A radio frequency identification system having a radio frequency transceiver for generating a continuous wave RF interrogation signal that impinges upon an RF identification tag. An oscillation circuit in the RF identification tag modulates the interrogation signal with a subcarrier of a predetermined frequency and modulates the frequency-modulated signal back to the transmitting interrogator. The interrogator recovers and analyzes the subcarrier signal and determines its frequency. The interrogator generates an output indicative of the frequency of the subcarrier frequency, thereby identifying the responding RFID tag as one of a "class" of RFID tags configured to respond with a subcarrier signal of a predetermined frequency.
- Inventors:
- Issue Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1174959
- Patent Number(s):
- 6765476
- Application Number:
- 09/802,408
- Assignee:
- Battelle Memorial Institute Kl-53 (Richland, WA)
- Patent Classifications (CPCs):
-
G - PHYSICS G06 - COMPUTING G06K - RECOGNITION OF DATA
- DOE Contract Number:
- AC06-76RL01830
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION
Citation Formats
Steele, Kerry D., Anderson, Gordon A., and Gilbert, Ronald W. Multi-level RF identification system. United States: N. p., 2004.
Web.
Steele, Kerry D., Anderson, Gordon A., & Gilbert, Ronald W. Multi-level RF identification system. United States.
Steele, Kerry D., Anderson, Gordon A., and Gilbert, Ronald W. Tue .
"Multi-level RF identification system". United States. https://www.osti.gov/servlets/purl/1174959.
@article{osti_1174959,
title = {Multi-level RF identification system},
author = {Steele, Kerry D. and Anderson, Gordon A. and Gilbert, Ronald W.},
abstractNote = {A radio frequency identification system having a radio frequency transceiver for generating a continuous wave RF interrogation signal that impinges upon an RF identification tag. An oscillation circuit in the RF identification tag modulates the interrogation signal with a subcarrier of a predetermined frequency and modulates the frequency-modulated signal back to the transmitting interrogator. The interrogator recovers and analyzes the subcarrier signal and determines its frequency. The interrogator generates an output indicative of the frequency of the subcarrier frequency, thereby identifying the responding RFID tag as one of a "class" of RFID tags configured to respond with a subcarrier signal of a predetermined frequency.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {7}
}
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