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Communication apparatus for vehicle

  • US 20070030119A1
  • Filed: 10/14/2005
  • Published: 02/08/2007
  • Est. Priority Date: 07/08/2005
  • Status: Active Grant
First Claim
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1. A communication apparatus for a vehicle comprising:

  • an on-board unit installed on a vehicle; and

    a portable unit adapted to be carried by a user of said vehicle;

    wherein a response signal is sent from said portable unit to said on-board unit in response to a signal transmitted from said on-board unit;

    said portable unit includes a power generation circuit for supplying electric power to circuits in said portable unit by a power generation radio wave sent from said on-board unit; and

    said on-board unit sends a communication signal after sending said power generation radio wave.

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