Multi-band ring focus antenna system
US6831613B1 · kind B1 · utility
15Cited by
8References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2003 |
| Grant date | Dec 14, 2004 |
| Priority date | — |
| Expiry date | Jun 20, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q19/19
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for feeding a compact main reflector of an RF antenna on a plurality of spectrally offset frequency bands. The method can include the steps of forming a focal ring for a main reflector (304) by positioning an RF source (301) at a first frequency within a first frequency band in the far field relative to a shaped non-linear surface of revolution so that the shaped non-linear surface of revolution forms a subreflector (302). A second focal ring can be formed for the main reflector (304) by positioning a second RF source (300) in the nearfield of the shaped non-linear surface of revolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.