Patent ID: 6556125
Filing Date: 2003-04-29
Classification: E05B,G07C

Abstract:
In a motor vehicle having at least one door with a door surface, at least one door handle, and at least one locking unit, an access control device for the motor vehicle, comprising:a transmitting and receiving unit disposed at the vehicle for transmitting a request signal and for receiving a reply signal; an evaluation unit in said transmitting and receiving unit for comparing the reply signal with an expected code signal and for controlling the at least one locking unit in dependence on a result of the comparison; a portable encoder for receiving the request signal, for returning a coded reply signal, and for demonstrating authorization of a user carrying the encoder to lock and unlock at least one locking unit; and a transmitting and receiving antenna connected to said transmitting and receiving unit, said antenna having cores and at least two coils each wound onto a respective one of said cores, said coils disposed in at least one door handle at a distance from the door and at an inclination relative to the door surface and relative to one another.