A communication apparatus for a vehicle achieves reduction in size and cost of a portable unit by making unnecessary an oscillation circuit and a battery in the portable unit. The apparatus is provided with an on-board unit installed on the vehicle and a portable unit carried by a user of the vehicle. A response signal is sent from the portable unit to the on-board unit in response to a signal transmitted from the on-board unit. The portable unit includes a power generation circuit for supplying electric power to circuits in the portable unit by a power generation radio wave sent from the on-board unit, and the on-board unit sends a communication signal after sending the power generation radio wave.
Communication apparatus for vehicle
2015-09-08
Patent
Elektronische Ressource
Englisch
VEHICLE COMMUNICATION SYSTEM, VEHICLE COMMUNICATION APPARATUS, AND MANAGEMENT APPARATUS
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