Antenna device in car radar system
AssigneeCelsiustech Electronics AB
InventorsThomas Larsson, Arne Silen, Thomas Andersson
Life of this patent
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Abstract
An antenna device used in a car radar system for emitting and/or receiving electromagnetic radiation, comprises a rotatable reflector; a feeder fixed relative to the antenna device and interacting with the reflector; a motor for driving the reflector; and a tachometer for monitoring the rotation of the reflector and for controlling the drive motor. The drive motor and the tachometer are constituted by flag motors, each having a rotor with flat coils and a stator including permanent magnets, the rotor being rotatable in a magnetic field created by permanent magnets and having the coil ends directed towards the permanent magnets, the rotors of the flag motors being rigidly, mechanically connected to each other.
Claims11
An antenna device used in a car radar system for emitting and/or receiving electromagnetic radiation, comprising:
- a rotatable reflector;
- a feeder fixed relative to the antenna device and interacting with the reflector;
- a motor for driving the reflector;
- and
- a tachometer for monitoring the rotation of the reflector and for controlling the drive motor,
- the drive motor and the tachometer being constituted by flag motors, each having a rotor with flat coils and a stator including permanent magnets, said rotor being rotatable in a magnetic field created by permanent magnets and having the coil ends directed towards the permanent magnets, the rotors of the flag motors being rigidly, mechanically connected to each other.
Dependencies are inferred from the claim text.