Device for near-field radiofrequency communication with a portable element on board a motor vehicle
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United States of America Patent
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Jul 17, 2018
Grant Date -
Jun 15, 2017
app pub date -
Jul 23, 2015
filing date -
Jul 31, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Disclosed is a device (D′) for near-field radiofrequency communication with a portable element, the device including: at least one near-field communication primary antenna (A0) having a predetermined communication frequency (Fc); and a microcontroller (30′) electrically connected to the primary antenna, including a power supply source for the primary antenna and a receiver unit for the data (20′) received by the primary antenna. The communication device further includes: at least one passive relay antenna (A1 . . . A8), juxtaposed with the primary antenna, relay frequencies (F1 . . . F8), lying within a range of values around the predetermined communication frequency (Fc), but different from the predetermined communication frequency (Fc), electrically connected to the data receiver unit. Also included is a unit (C4) for adjusting the relay frequency. The communication device can be used to enlarge the near-field communication surface of the communication device.
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