Frequency-Domain Multi-Element Capacitive Proximity Sensor Array Based on a Bandstop Filter Design
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United States of America Patent
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Issued Date -
Jul 30, 2015
app pub date -
Jan 29, 2014
filing date -
Jan 29, 2014
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Abstract
A proximity sensor detects an object. The sensor includes a set of two or more sensing elements. Each sensing elements includes a bandstop filter for selecting a different notch resonant frequency for the element. The notch resonant frequencies are isolated from each other. A change in transmission around each notch frequency is measured detect to the object.
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