Minimum Redundancy Spacing Functions for Surface Acoustic Wave (SAW) Sensor Devices
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United States of America Patent
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Issued Date -
Mar 16, 2017
app pub date -
Sep 16, 2016
filing date -
Sep 16, 2015
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Abstract
A surface acoustic wave sensor system for determining environmental conditions on a substrate. The system comprises an interrogator for producing an RF interrogating signal transmitted by an antenna to an interdigital transducer mounted on the substrate for producing an incident surface acoustic wave responsive to the interrogating signal. A plurality of reflector arrays mounted on the substrate produce a like plurality of reflected surface acoustic waves; a spacing between adjacent ones of the plurality of reflector arrays comprising a non-uniform distance. The plurality of reflected surface acoustic waves are responsive to the environmental condition and exhibit a characteristic from which the environmental condition can be determined by a processing component.
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