ANTENNA DEVICE

摘要

The invention relates to an antenna device for emitting and/or receiving electromagnetic radiation, such as radar radiation in a car radar apparatus. Sweeping is realized by means of a fixed feeder (15) and a rotatable reflector (6). The reflector (6) is driven by a drive motor (11, 12) and its motion is monitored by a tachometer (13, 14). According to the invention, the drive motor and the tachometer are constituted by so-called flag motors which are mutually motionally coupled to each other by mechanical means.