Multi-frequency antenna feed
US6720932B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2001 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Nov 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q5/47
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multi-frequency antenna feed for incorporation into a single unit which combines at least two waveguides to provide simultaneous reception and/or transmission of signals in at least two separate frequency bands is described.This is achieved by creating a waveguide system of at least two waveguides sharing the same central axis; a central conventional waveguide which also acts as a center conductor for an outer coaxial waveguide and feeding the outer coaxial waveguide from a non-circular side feed, orthogonal to the waveguide axis, to set up a uniform field in the outer coaxial waveguide. The feeds are adjusted so that the phase center for each frequency band is at the same point in the feed for the same dish. Various embodiments of the invention are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.