Multiple-channel feed network
US6661309B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2001 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | Dec 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2131
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multi-channel feed network includes a main waveguide section (either square or circular) for connection to a satellite antenna for propagating two orthogonal polarizations. The feed network further includes a low pass section connected on axis with the main waveguide, the low pass section having the same cross section as the main waveguide, and a high pass section also connected perpendicular to the main waveguide. The low pass section includes a band reject filter (BRF) formed from slots cut to reject higher frequency signals. The high pass section can be a rectangular waveguide which functions to filter low frequency signals. The feed network can be configured to support a number of different polarizations. Orthogonal linear polarizations are provided for the high frequency bands by adding additional high pass sections connected by power dividers, and for the low frequency bands by adding a conventional OMT. Adding a polarizer between the antenna and main waveguide section enables both the high pass and low pass sections to support left or right hand circular polarization. By adding a 90° degree hybrid coupler, the high pass section can support circular polarization alone. …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.