Antenna rotator apparatus
US4446407A · kind A · utility
14Cited by
43References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1982 |
| Grant date | May 1, 1984 |
| Priority date | — |
| Expiry date | Mar 8, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A control circuit for an antenna rotator includes a difference amplifier which develops a motor drive signal of both positive and negative polarity for rotation of a DC motor in both clockwise and counterclockwise directions. A feedback loop circuit for control of the motor is provided by a sensor of antenna position, the sensor being coupled between the antenna and the amplifier. Friction in a gear train coupling the motor to the antenna isolates the circuit from wind induced vibrations of the antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.