Antenna structure with proximity sensor
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United States of America Patent
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Feb 27, 2018
Issued Date -
N/A
app pub date -
Jan 14, 2014
filing date -
Jan 14, 2014
priority date (Note) -
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Abstract
An antenna structure includes a dielectric layer, on one side thereof a patterned conductive layer, a proximity sensor and a capacitor are provided. The patterned conductive layer includes a first and a second conductive layer that together form a coupled-fed antenna and respectively have a first and a second feed terminal connected to a signal feed line and a ground signal line. The proximity sensor includes a peripheral circuit connected to the second feed terminal, and a capacitance to digital circuit. The capacitor is connected between the ground signal line and the second feed terminal. By integrating the coupled-fed antenna and the proximity sensor on one circuit substrate, a part of the antenna can be used as the proximity sensor's capacitor electrode to reduce the volume and manufacturing cost of the antenna, and the proximity sensor is not interfered by other parts of the antenna and thereby has increased sensitivity.
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