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Sensors, Vol. 18, Pages 2103: An Antenna Proximity Sensor for Mobile Terminals Using Reflection Coefficient

Sensors, Vol. 18, Pages 2103: An Antenna Proximity Sensor for Mobile Terminals Using Reflection Coefficient

Sensors doi: 10.3390/s18072103

Authors: Wonsub Lim Dongil Yang Youngoo Yang

This paper presents a new antenna proximity sensor for mobile terminals based on the measured reflection coefficient using a bidirectional coupler which is positioned between the main antenna and the front-end module. Using the coupled forward and reverse long-term evolution signals by the bidirectional coupler, the reflection coefficient looking into the antenna was calculated in the base-band processor. The measured reflection coefficients showed clear differences for both the types of objects, and the distances between the terminal and the objects. The proposed antenna proximity sensor showed a recognition distance that was approximately 5 mm longer than that of a conventional capacitive proximity sensor.

Autoren:   Lim, Wonsub ; Yang, Dongil ; Yang, Youngoo
Journal:   Sensors
Band:   18
Ausgabe:   7
Jahrgang:   2018
Seiten:   2103
DOI:   10.3390/s18072103
Erscheinungsdatum:   30.06.2018
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