Wireless Chemical Sensor and Sensing Method for Use Therewith
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United States of America Patent
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Issued Date -
Nov 12, 2009
app pub date -
May 11, 2009
filing date -
May 9, 2008
priority date (Note) -
Abandoned
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Abstract
A wireless chemical sensor includes an electrical conductor and a dielectric material on the conductor. The conductor is electrically unconnected and is shaped for storage of an electric field and a magnetic field. In the presence of a time-varying magnetic field, the conductor resonates to generate harmonic electric and magnetic field responses, each of which has a frequency associated therewith. The dielectric material is selected such that it experiences changes in dielectric attributes thereof in the presence of a chemical-of-interest. Shifts from the sensor's baseline frequency response indicate that the dielectric material has been exposed to the chemical-of-interest.
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