Correction method for transverse defocussing of parabolic antenna
US4365252A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1980 |
| Grant date | Dec 21, 1982 |
| Priority date | — |
| Expiry date | Dec 3, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/1264
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A correction method for transverse defocussing of paraboloid oriented relative to the source initially aligned with the focus consists of securing said paraboloid to first platform, articulating said first platform through hinge means jointed to second platform, itself articulated through further hinge means jointed to a stationary part, and then orienting said hinge means to said focus, while providing moving means for said platforms, said moving means being servocontrolled responsive to pointing error detector thereby to hold permanently said focus close to the source. Provision is also made of a parabolic antenna comprising means for carrying out said method. The system is applied to radio and TV broadcast apparatus aboard satellites.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.