Antenna system with plural horn feeds
US4559540A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1985 |
| Grant date | Dec 17, 1985 |
| Priority date | — |
| Expiry date | Jun 17, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q19/19
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna system having a main reflector, a sub-reflector, and a plurality of horns for radiating different frequencies includes a beam waveguide system which cancels cross polarization otherwise inherent in the system. If the antenna system uses a non-rotationally-symmetric sub-reflector the cross polarization caused thereby is cancelled by the beam waveguide system having at least two focusing reflectors and selected parameters. Alternatively the beam waveguide system can be used with a rotationally symmetric and stationary sub-reflector by being positioned to reflect said beam on the axis of the main reflector. Either the horns or the focusing reflectors may be rotatably switched, the other group being stationary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.