Chemical and biological sensors, systems and methods based on radio frequency identification
First Claim
1. A detection system utilizing at least one radiofrequency identification (RFID) sensor comprising:
- an RFID sensor comprising;
a substrate;
an antenna disposed upon said substrate;
a sensor material disposed adjacent to at least a portion of the antenna and the sensor material being selected to be sensitive to one of chemical or biological environment; and
a reader for receiving and processing signals from said RFID tag, wherein said reader is configured to measure a signal in the form of a complex impedance from said RFID tag wherein said signal comprises a plurality of frequencies and changes in the real and imaginary parts of the complex impedance;
wherein said changes in the real and imaginary parts of the complex impedance comprise a frequency shift of the maximum of the imaginary part of the complex impedance (F1 shift), a frequency shift of the minimum of the imaginary part of the complex impedance (F2 shift), a frequency shift of the maximum of the real part of the complex impedance (Fp), and changes in magnitude of the real part of the complex impedance (Zp); and
,wherein said complex impedance is related to a nature and a concentration of analyte species and is derived from multivariate analysis.
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Accused Products
Abstract
An embodiment of the invention described herein is directed to a detection system utilizing at least one radiofrequency identification (RFID) sensor comprising: an RFID sensor comprising: a substrate; an antenna; a sensor material selected to be sensitive to one of chemical or biological environment; and a reader, wherein said reader is configured to measure a signal in the form of a complex impedance from said RFID tag wherein said signal comprises a plurality of frequencies and a frequency shift of the maximum of the imaginary part of the complex impedance, a frequency shift of the minimum of the imaginary part of the complex impedance, a frequency shift of the maximum of the real part of the complex impedance, and changes in magnitude of the real part of the complex impedance; and, wherein said complex impedance is related to a nature and a concentration of analyte species derived from multivariate analysis.
11 Citations
18 Claims
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1. A detection system utilizing at least one radiofrequency identification (RFID) sensor comprising:
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an RFID sensor comprising; a substrate; an antenna disposed upon said substrate; a sensor material disposed adjacent to at least a portion of the antenna and the sensor material being selected to be sensitive to one of chemical or biological environment; and a reader for receiving and processing signals from said RFID tag, wherein said reader is configured to measure a signal in the form of a complex impedance from said RFID tag wherein said signal comprises a plurality of frequencies and changes in the real and imaginary parts of the complex impedance; wherein said changes in the real and imaginary parts of the complex impedance comprise a frequency shift of the maximum of the imaginary part of the complex impedance (F1 shift), a frequency shift of the minimum of the imaginary part of the complex impedance (F2 shift), a frequency shift of the maximum of the real part of the complex impedance (Fp), and changes in magnitude of the real part of the complex impedance (Zp); and
,wherein said complex impedance is related to a nature and a concentration of analyte species and is derived from multivariate analysis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A detection system comprising:
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a radiofrequency (RF) wireless sensor; a sensor reader configured to transmit RF energy to said RF wireless sensor, configured to receive and process signals from said RF wireless sensor, and configured to measure a plurality of frequency shifts and changes in magnitude corresponding to real and imaginary parts of the complex impedance of said RF wireless sensor at least three frequencies, wherein said frequency shifts comprise a frequency shift of the maximum of the imaginary part of the complex impedance (F1 shift), a frequency shift of the minimum of the imaginary part of the complex impedance (F2 shift), a frequency shift of the maximum of the real part of the complex impedance (Fp) and a magnitude of the real part of the complex impedance (Zp); and
,a multivariate signal processor that derives the concentration of at least one species of interest from multivariate analysis of the measured and computed parameters of frequency shifts and changes in the magnitude. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification