Passive wireless sensor
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United States of America Patent
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Dec 8, 2020
Grant Date -
Aug 4, 2016
app pub date -
Apr 13, 2016
filing date -
Oct 16, 2013
priority date (Note) -
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Abstract
Passive wireless sensors include an antenna. The antenna receives a combined signal. The combined signal includes a low frequency modulating signal modulated on a high frequency carrier wave. A demodulator receives the combined signal and extracts the modulating signal. A sensor receives the extracted modulating signal and produces an output signal with a time delay indicative of a property to be sensed. A modulator receives the output signal and the high frequency carrier wave and modulates the output signal onto the high frequency carrier wave to create a combined output signal broadcast by the antenna.
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