Antenna device in car radar system
US5963174A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1998 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Mar 5, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/20
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.