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Multiple-mode acoustic wave sensor

  • US 20060230834A1
  • Filed: 04/14/2005
  • Published: 10/19/2006
  • Est. Priority Date: 04/14/2005
  • Status: Active Grant
First Claim
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1. A multiple-mode acoustic wave sensor apparatus, comprising:

  • a wireless interrogation unit comprising a transmitter and a receiver;

    an acoustic wave device comprising a piezoelectric substrate and at least one electrode on said piezoelectric substrate; and

    a plurality of antennas configured on said piezoelectric substrate in association with said acoustic wave device, wherein each antenna among said plurality of antennas is responsive to varying interrogation signals transmitted wirelessly to said plurality of antennas from said wireless interrogation unit in order to excite multiple frequency modes via at least one interdigital transducer on said piezoelectric substrate and thereby passively detect multiple and varying parameters of a sensed material utilizing said acoustic wave device.

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