Feed network for simultaneous generation of narrow and wide beams with a rotational-symmetric antenna
US6791507B2 · kind B2 · utility
19Cited by
9References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2003 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Feb 13, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An N-element rotational-symmetric array antenna can generate N fixed pencil-beams simultaneously with an omnidirectional beam. An N×N Butler matrix can be used to feed the array antenna, using fewer than N input ports of the Butler matrix to produce the pencil-beams. One or more of the modes generated by the Butler matrix can be individually accessed to produce one or more corresponding omnidirectional beams. The N×N Butler matrix can be driven by a feed network that provides both power dividing and beam-steering, which permits simultaneous generation of the N pencil-beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.