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Antenna device and method of antenna configuration

  • US 9,252,484 B2
  • Filed: 12/12/2012
  • Issued: 02/02/2016
  • Est. Priority Date: 12/13/2011
  • Status: Active Grant
First Claim
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1. A communication antenna device (D), on board a motor vehicle, for communicating with an antenna of a portable device, said antenna device (D) including:

  • a communication antenna (A) including at least two parts, a first part (A1), comprising a maximum number of primary windings (E1MAX) and a second part (A2) comprising a maximum number of secondary windings (E2MAX),a microcontroller (10) electrically connected to said antenna (A),said antenna device (D) being characterized in that it further includes;

    at least one first switching means (M1), located between the microcontroller (10), the first part (A1) and the second part (A2), for connecting the first part (A1) and/or the second part (A2) to the microcontroller (10),at least one second switching means (M2), located between the microcontroller (10), and each primary winding (E1i) of the first part (A1) for connecting a determined number of primary windings (E1i) of the first part (A1) to the microcontroller (10), andat least one third switching means (M3), located between the microcontroller (10), and each secondary winding (E2j) of the second part (A2) for connecting a determined number of secondary windings (E2j) of the second part (A2) to the microcontroller (10),means of controlling (20) the first, second and third switching means (M1, M2, M3).

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