External antenna device for keyless access system for motor vehicle, has number-plate lamp formed for vehicle, and antenna integrated in lamp and comprising coil with coil windings that run around main direction of coil

摘要

The device has a number-plate lamp formed for a motor vehicle and an antenna (10) integrated in the lamp. The antenna has a coil comprising coil windings running around a main direction of the coil. The main direction is aligned transverse to a driving direction during normal arrangement of the lamp at the vehicle for illumination of a number-plate. A housing (16) has a common plug connection (26) for an illuminant (22) of the lamp and for the antenna. The housing has a light exit opening for light that is emitted from the lamp.