Multibeam antenna
US7522116B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2007 |
| Grant date | Apr 21, 2009 |
| Priority date | — |
| Expiry date | Feb 16, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/288
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna capable of generating multiple beams that are close together and have side lobes of low level includes optics comprising a single main reflector and a set of primary sources, each source suitable for generating a beam taken up by the optics that transmits it, or suitable for receiving a beam picked up by the optics of the antenna. The main reflector has an aperture of diameter D as a function of the center wavelength of the frequency band of the beams and the half-power beam width of the beams coming from the main antenna element, and a dimensionless number lying in the range 1.5 to 4. The optics present a profile that is modified relative to conventional optics comprising a parabolic main reflector by a correction that imparts an amplitude and phase distribution that is preferably circularly symmetrical, and compliant with a relationship for enlarging the reflected beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.