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Chemical sensors based on chipless radio frequency identification (RFID) architectures

A radio frequency identification and sensor technology, applied in the field of chemical sensors, can solve the problem of high cost

Active Publication Date: 2017-11-21
XEROX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These sensors can include a large number of electronic components that may require manual assembly and are therefore expensive

Method used

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  • Chemical sensors based on chipless radio frequency identification (RFID) architectures
  • Chemical sensors based on chipless radio frequency identification (RFID) architectures
  • Chemical sensors based on chipless radio frequency identification (RFID) architectures

Examples

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Embodiment Construction

[0023] Exemplary embodiments of the present teachings will now be described in detail, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0024] Unless otherwise indicated, the term "chipless" as used herein describes a radio frequency identification (RFID) transponder that has neither integrated circuits nor discrete electronic components, such as transistors or coils; the terms "resonator" or " Resonant structure" means a structure having an associated resonance corresponding to a characteristic frequency; the term "spectral signature" means at least one identified resonance associated with an applied excitation frequency; the term "tag" means a transponder or a combination of transponder and other structure, other The structure may comprise a carrier on which the transponder is disposed or a device package in which the transponder is disposed...

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Abstract

A method and structure for a radio frequency identification (RFID) sensor that may be used to monitor various environmental conditions. The environmental condition measured depends on a sensor material used in the RFID sensor. The sensor material is selected based on a flux in electrical conductivity relative to its saturation of the environmental condition being monitored. The sensor material is placed between adjacent electrically conductive structures of the RFID sensor. Upon a change in the environmental condition being measure, the electrical conductivity of the sensor material changes, thereby increasing or decreasing an amplitude of a response by the RFID sensor to an interrogation by an RFID reader.

Description

technical field [0001] The present teachings relate generally to chipless radio frequency identification (RFID) tags, and more specifically to chemical sensors based on chipless RFID architectures. Background technique [0002] Radio frequency identification (RFID) technology has become increasingly common for inventory tracking, loss prevention, and other uses. RFID systems may include transponders or tags placed on objects and interrogators or readers that wirelessly receive information transmitted by the tags. RFID tags can be broadly classified as active tags, which include a local power source, such as a battery, or passive tags, which are excited by electromagnetic waves generated by the reader, which induce a current in an antenna within the tag. [0003] RFID tags may include electronic circuitry, which may be in the form of a chip or an integrated circuit (IC). The chip can store data for transmission to the reader. In contrast, chipless RFID tags have neither in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/07G01N27/02
CPCG01N27/02G06K19/0716G06K19/0672G06K19/0677G01N27/416G06K19/0723G06K7/10009C08F116/06C08F120/06C08G73/0611G06K7/10366
Inventor G·A·吉布森
Owner XEROX CORP