System and method for implementing a multi-beam antenna without duplex filters within a base station
US6697643B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2000 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Aug 8, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/086
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to cellular systems and methods for providing a multi-beam antenna configuration within a base station without utilizing duplex filters. The multi-beam antenna configuration of the present invention produces overlaid beams in both the uplink and downlink to cover the same area. Each beam has orthogonally oriented polarization directions (e.g., linear polarized slanted ±45°) for the uplink and downlink. Adjacent uplink beams shall also have shifted polarization directions in order to attain polarization diversity between different beams. In order to implement this polarization configuration, for each beam, there is a selective filter in front of the low noise amplifier for the uplink, and no duplex filter in front of the amplifier in the downlink direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.